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Preparation method of less-layer MoS2/phosphorus-doped graphene electrochemical sodium-storage combined electrode
ActiveCN105161691AHigh electrochemical sodium storage capacityMultiple sodium storage active sitesMaterial nanotechnologyCell electrodesDoped graphenePhosphonium salt
The invention discloses a preparation method of a less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode. The method comprises steps as follows: S1, dispersing graphene oxide into water, adding quaternary phosphonium salt, evenly mixing the mixture, then sequentially adding molybdate and a sulfur source, and evenly mixing the mixture; S2, subjecting a mixed disperse system obtained in S1 to a hydrothermal reaction, performing cooling, performing centrifugal collection of a solid product, performing washing and drying, performing heat treatment in the argon or nitrogen atmosphere, and a less-layer MoS2 / phosphorus-doped graphene composite nanomaterial is prepared; S3, taking the composite nanomaterial obtained in S2 as an electrochemical sodium-storage substance to prepare the composite electrode. The graphene oxide, the molybeate and the sulfur source are used as raw materials, and the less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode is successfully prepared with a hydrothermal method, the heat treatment method and the like assisted by quaternary phosphonium salt. The method has the advantages of simplicity, convenience and easiness of industrial application enlargement.
Owner:LINGNAN NORMAL UNIV
Multi-edge MoS2 nano piece/graphene composite nanomaterial and preparation method thereof
InactiveCN104091931AGood dispersionHigh surface energyMaterial nanotechnologyCell electrodesSodium molybdateRoom temperature
The invention discloses a multi-edge MoS2 nano piece / graphene composite nanomaterial and a preparation method thereof, wherein the multi-edge MoS2 nano piece / graphene composite nanomaterial is formed by compounding few layers of multi-edge MoS2 nano pieces and graphene; the ratio of the amount of substance of MoS2 to the graphene is (1:1)-(1:4); the preparation method comprises the steps of firstly, carrying out ultrasonic dispersion on graphene oxide into deionized water, feeding ionic liquid, and fully stirring; sequentially feeding L-cysteine and sodium molybdate, fully mixing for fully dissolving to obtain a mixed disperse system, transferring the mixed disperse system into a hydrothermal reaction kettle, and carrying out hydrothermal reaction for 24 hours at the temperature of 230-250 DEG C; and naturally cooling to the room temperature to obtain a solid hydrothermal product, carrying out centrifugal collection on the solid hydrothermal product, washing, drying, and carrying out heat treatment to obtain the multi-edge MoS2 nano piece / graphene composite nanomaterial. The method has the characteristics of being simple and convenient, and has the advantage of being easy to expand in industrialized application. The prepared composite nanomaterial is wide in application range.
Owner:ZHEJIANG UNIV
Preparation method of small-layer-number MoSe2 nanosheet/nitrogen and phosphorus co-doped graphene composite nanomaterial
ActiveCN105152126AImprove electrocatalytic activitySimple methodMaterial nanotechnologyElectrodesDoped graphenePhosphonium salt
The invention discloses a preparation method of a small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial. The method includes the steps that S1, graphene oxide is dispersed into water, quaternary phosphonium salt is added and evenly mixed, and then molybdate, selenium powder and hydrazine are sequentially added and evenly mixed; S2, a mixed dispersion system obtained in the S1 is subjected to hydrothermal reaction and cooled, a solid product is collected through centrifugation, washed, dried and subjected to heat treatment under nitrogen or argon atmosphere, and then the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial can be obtained through preparation. With graphene oxide, molybdate, selenium powder and hydrazine as raw materials, the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial is successfully prepared through the hydrothermal method assisted by quaternary phosphonium salt and the subsequent heat treatment method. The method has the advantages of being simple and convenient to implement, and the industrialized application range of the method can be easily widened.
Owner:LINGNAN NORMAL UNIV
Multi-edge MoS2 nanosheet/graphene electrochemical lithium storage composite electrode and preparation method thereof
InactiveCN104124434AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesLithiumComposite electrode
The invention discloses a multi-edge MoS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. The electrochemical lithium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano material, the ratio of the amount of substance of MoS2 to graphene in the composite nano material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80-85% of multi-edge MoS2 nanosheet / graphene composite nano material, 5-10% of acetylene black and 5-10% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano material, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil with the slurry, and rolling to obtain the composite electrode. The prepared multi-edge MoS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage volume.
Owner:ZHEJIANG UNIV
Molybdenum disulfide/nitrogen doped carbon composite material and preparation method and application thereof
ActiveCN109273691AImprove conductivityImprove structural stabilityCell electrodesCarbon compositesStructural stability
The invention discloses a molybdenum disulfide / nitrogen doped carbon composite material and a preparation method and application thereof. The preparation method of the molybdenum disulfide / nitrogen doped carbon composite material comprises the following steps: S1. Preparing an acidic galactosamine solution; 2, adding a molybdenum source and a sulfur source into that galactosamine solution to obtain a mixed solution; The molar ratio of galactosamine to molybdenum atom in molybdenum source is (1.4-14.3): 3, carrying out a hydrothermal reaction on that mixed solution, and after post-treatment, obtaining a solid product; 4, heating a solid product in an inert atmosphere to obtain molybdenum disulfide / nitrogen doped carbon composite material. The preparation method of the molybdenum disulfide / nitrogen doped carbon composite material provided by the invention uses galactosamine as carbon source and nitrogen source, and combines hydrothermal method and heat treatment technology. The molybdenum disulfide / nitrogen doped carbon composite prepared by the preparation method improves the conductivity and structural stability of molybdenum disulfide.
Owner:LINGNAN NORMAL UNIV
Graphene-like WS2/nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode preparation method
ActiveCN105336919AEnhanced electrochemical sodium storage performanceSimple methodCell electrodesDoped graphenePhosphonium salt
The present invention discloses a graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene composite nanometer material; and S3, adopting the composite nanometer material obtained in the step S2 as the electrochemical sodium storage active substance to prepare the composite electrode. According to the present invention, graphene oxide, ammonium thiotungstate and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal and heat treatment method and other methods are used to successfully prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode; and the method has advantages of simpleness, convenience, and easy industrial application expanding.
Owner:LINGNAN NORMAL UNIV
Se-doped less-layer WS2 nano-sheet/nitrogen and phosphorus co-doped graphene composite nanometer material preparation method
ActiveCN105327708AImprove electrocatalytic activitySimple methodPhysical/chemical process catalystsElectrolysis componentsDoped graphenePhosphonium salt
The present invention discloses a Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate, selenium powder and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material. According to the present invention, graphene oxide, ammonium thiotungstate, selenium powder and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal method and the subsequent heat treatment method are used to successfully prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material; and the method has advantages of simpleness, convenience, and easy industrial application expanding.
Owner:LINGNAN NORMAL UNIV
Preparation method of graphene-like MoS2/nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode
ActiveCN105304862AFacilitate the expansion of industrial applicationsEasy to expand industrial applicationMaterial nanotechnologyCell electrodesAmmonium molybdateGraphite oxide
The invention discloses a preparation method of a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode. The method comprises the following steps of: S1, dispersing graphene oxide in water, adding quaternary phosphonium salt to carry out uniform mixing, then sequentially adding ammonium thiomolybdate and hydrazine and carrying out uniform mixing; S2, performing a hydrothermal reaction on a mixed disperse system obtained in S1, carrying out cooling, centrifugally collecting a solid product, washing and drying the solid product, and then carrying out heat treatment in the argon or nitrogen atmosphere to prepare and obtain a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene composite nano material; S3, using the composite nano material obtained in S2 as an electrochemical lithium storage active substance to prepare the composite electrode. According to the preparation method, the graphene oxide, the ammonium thiomolybdate and the hydrazine are used as raw materials and by methods of quaternary phosphonium salt assisted hydrothermal, heat treatment and the like, the graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode is successfully prepared. The method disclosed by the invention has the advantages of simplicity, convenience and easiness in enlarging industrial application.
Owner:LINGNAN NORMAL UNIV
Molybdenum diselenide/nitrogen-doped carbon composite nano material, and preparation method and application thereof
ActiveCN109279583AImprove electrical conductivity and structural stabilityUniform shape and sizeCarbon preparation/purificationMetal selenides/telluridesCarbon sourceSelenium
The invention discloses a molybdenum diselenide / nitrogen-doped carbon composite nano material, and a preparation method and application thereof. The preparation method of the molybdenum diselenide / nitrogen-doped carbon composite nano material comprises the following steps: S1, dissolving a selenium source in hydrazine hydrate to obtain a solution A; S2, preparing an acidic galactosamine solution,and adding a molybdenum source to obtain a solution B, wherein the molar ratio of galactose amine to molybdenum atoms in the molybdenum source is (3-15):1; S3, uniformly mixing the solution A and thesolution B, then carrying out a hydrothermal reaction, and carrying out post-treatment to obtain a solid product; and S4, carrying out heat treatment on the solid product in an inert atmosphere to obtain the molybdenum diselenide / nitrogen-doped carbon composite nano material. According to the invention, the galactose amine is used as a carbon source and a nitrogen source, and the molybdenum diselenide / nitrogen-doped carbon composite nano material is prepared by adopting a hydrothermal method and a heat treatment technology. The molybdenum diselenide / nitrogen-doped carbon composite nano material improves conductivity and structural stability of molybdenum diselenide.
Owner:LINGNAN NORMAL UNIV
Perovskite solar cell taking polyaniline as hole transmission layer and manufacturing method of cell
InactiveCN106601915AImprove solubilityImprove bindingSolid-state devicesSemiconductor/solid-state device manufacturingHole transport layerAniline
The invention relates to a perovskite solar cell taking polyaniline as a hole transmission layer. The perovskite solar cell comprises transparent conductive glass, a compact layer, a perovskite light absorption layer, the hole transmission layer and a metal back electrode. The perovskite solar cell is characterized in that co-doped poly(beta-aminoethoxy) aniline derivatives of halogen acids and transition metal halide is taken as the hole transmission layer, chemical composition of the hole transmission layer is PFMX4, PF stands for the poly(beta-aminoethoxy) aniline derivatives, M stands for Fe, Co, Ni, Cu and Mn transition metal ions or mixtures thereof, and X stands for F, Cl, Br and I. The perovskite solar cell is advantaged in that the hole transmission layer has conductivity, resistance of the perovskite solar cell can be reduced, and photoelectric conversion efficiency of the perovskite solar cell can be improved.
Owner:TIANJIN VOCATIONAL INST
Multi-edge MoS2 nano piece/graphene electrochemical magnesium storage composite electrode and preparation method thereof
InactiveCN104091925AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesMaterials scienceNanomaterials
The invention discloses a multi-edge MoS2 nano piece / graphene electrochemical magnesium storage composite electrode and a preparation method thereof, wherein an electrochemical magnesium storage active substance is a composite nanomaterial of few layers of multi-edge MoS2 nano pieces and graphene; the ratio of the amount of substance of MoS2 to the graphene in the composite nanomaterial is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of the multi-edge MoS2 nano piece / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps of firstly, preparing the multi-edge MoS2 nano piece / graphene composite nanomaterial, mixing the obtained composite nanomaterial with the acetylene black and the polyvinylidene fluoride to prepare even paste, evenly coating foamy copper taken as a current collector with the paste, drying, and rolling to obtain the electrochemical magnesium storage composite electrode. The electrochemical magnesium storage composite electrode has the high electrochemical magnesium storage capacity.
Owner:ZHEJIANG UNIV
Multi-edge WS2/graphene electrochemical lithium storage composite electrode and preparation method
InactiveCN104103810AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesLithiumComposite electrode
The invention discloses a multi-edge WS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. An electrochemical lithium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80%-85% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 5%-10% of acetylene black and 5%-10% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil is coated with the slurry, and the electrode is prepared through rolling. The prepared multi-edge WS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage capacity.
Owner:ZHEJIANG UNIV
Multi-edge WS2/graphene electrochemical magnesium storage composite electrode and preparation method
InactiveCN104103833AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesCopper foilSlurry
The invention discloses a multi-edge WS2 / graphene electrochemical magnesium storage composite electrode and a preparation method thereof. An electrochemical magnesium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared multi-edge WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil as a current collector is uniformly coated with the slurry, and after the slurry is dried, the composite electrode is obtained through rolling. The prepared multi-edge WS2 / graphene electrochemical magnesium storage composite electrode has high electrochemical magnesium storage capacity.
Owner:ZHEJIANG UNIV
Multi-edge WS2/graphene electrochemical sodium storage composite electrode and preparation method thereof
InactiveCN104091954AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesCvd grapheneSubstance amount
The invention discloses a multi-edge WS2 / graphene electrochemical sodium storage composite electrode and a preparation method thereof. The chemical sodium storage active substance is a composite nano material of few-layer multi-edge WS2 nano sheet and graphene; the substance amount ratio of the WS2 to graphene in the composite nano material is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of multi-edge WS2 nano sheet / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the following steps: preparing a few-layer multi-edge WS2 nano sheet / graphene composite nano material; blending the prepared composite nano material, acetylene black and polyvinylidene fluoride into uniform slurry; uniformly smearing the slurry on a copper foil serving as a current collector; and drying and rolling to obtain the multi-edge WS2 / graphene electrochemical sodium storage composite electrode. Through the invention, the prepared multi-edge WS2 / graphene electrochemical sodium storage composite electrode has high electrochemical sodium storage capacity.
Owner:ZHEJIANG UNIV
A kind of molybdenum diselenide/nitrogen-doped carbon composite nanomaterial and its preparation method and application
ActiveCN109279583BImprove conductivityImprove structural stabilityCarbon preparation/purificationMetal selenides/telluridesCarbon compositesPhysical chemistry
The invention discloses a molybdenum diselenide / nitrogen-doped carbon composite nano material, and a preparation method and application thereof. The preparation method of the molybdenum diselenide / nitrogen-doped carbon composite nano material comprises the following steps: S1, dissolving a selenium source in hydrazine hydrate to obtain a solution A; S2, preparing an acidic galactosamine solution,and adding a molybdenum source to obtain a solution B, wherein the molar ratio of galactose amine to molybdenum atoms in the molybdenum source is (3-15):1; S3, uniformly mixing the solution A and thesolution B, then carrying out a hydrothermal reaction, and carrying out post-treatment to obtain a solid product; and S4, carrying out heat treatment on the solid product in an inert atmosphere to obtain the molybdenum diselenide / nitrogen-doped carbon composite nano material. According to the invention, the galactose amine is used as a carbon source and a nitrogen source, and the molybdenum diselenide / nitrogen-doped carbon composite nano material is prepared by adopting a hydrothermal method and a heat treatment technology. The molybdenum diselenide / nitrogen-doped carbon composite nano material improves conductivity and structural stability of molybdenum diselenide.
Owner:LINGNAN NORMAL UNIV
A kind of se-doped ws with few layers 2 Preparation method of nanosheet/nitrogen and phosphorus co-doped graphene composite nanomaterial
ActiveCN105327708BImprove electrocatalytic activitySimple methodPhysical/chemical process catalystsElectrolysis componentsDoped graphenePhosphonium salt
The present invention discloses a Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate, selenium powder and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material. According to the present invention, graphene oxide, ammonium thiotungstate, selenium powder and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal method and the subsequent heat treatment method are used to successfully prepare the Se-doped less-layer WS2 nano-sheet / nitrogen and phosphorus co-doped graphene composite nanometer material; and the method has advantages of simpleness, convenience, and easy industrial application expanding.
Owner:LINGNAN NORMAL UNIV
multi-edge mos 2 Nanosheet/graphene electrochemical sodium storage composite electrode and preparation method
InactiveCN104124435BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesCopper foilMaterials science
The invention discloses a multi-edge MoS2 / graphene electrochemical sodium storage composite electrode and a preparation method thereof. The electrochemical sodium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano materials, the ratio of the amount of substance of MoS2 to graphene in the composite material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80% of multi-edge MoS2 nanosheet / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano materials, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil serving as a current collector with the slurry, drying and rolling to obtain the electrochemical sodium storage composite electrode. The prepared electrochemical sodium storage composite electrode has high electrochemical sodium storage volume.
Owner:ZHEJIANG UNIV
A low-layer mose 2 Preparation method of nanosheet/nitrogen and phosphorus co-doped graphene composite nanomaterial
ActiveCN105152126BImprove electrocatalytic activitySimple methodMaterial nanotechnologyElectrodesDoped graphenePhosphonium salt
The invention discloses a preparation method of a small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial. The method includes the steps that S1, graphene oxide is dispersed into water, quaternary phosphonium salt is added and evenly mixed, and then molybdate, selenium powder and hydrazine are sequentially added and evenly mixed; S2, a mixed dispersion system obtained in the S1 is subjected to hydrothermal reaction and cooled, a solid product is collected through centrifugation, washed, dried and subjected to heat treatment under nitrogen or argon atmosphere, and then the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial can be obtained through preparation. With graphene oxide, molybdate, selenium powder and hydrazine as raw materials, the small-layer-number MoSe2 nanosheet / nitrogen and phosphorus co-doped graphene composite nanomaterial is successfully prepared through the hydrothermal method assisted by quaternary phosphonium salt and the subsequent heat treatment method. The method has the advantages of being simple and convenient to implement, and the industrialized application range of the method can be easily widened.
Owner:LINGNAN NORMAL UNIV
multi edge ws 2 Nanosheet/graphene composite nanomaterial and preparation method thereof
InactiveCN104103818BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesIonic liquidNanocomposite
The invention discloses a multi-edge WS2 nanosheet / graphene composite nanomaterial and a preparation method thereof. The multi-edge WS2 nanosheet / graphene composite nanomaterial is composited by multi-edge WS2 nanosheets with a few layers and graphene, and a substance ratio of WS2 nanosheets to graphene is (1:1)-(1:4). The preparation method comprises the steps as follows: graphene oxide is ultrasonically dispersed in deionized water firstly, added with an ionic liquid, sufficiently stirred and then sequentially added with L-cysteine and ammonium thiotungstate, and L-cysteine and ammonium thiotungstate are sufficiently stirred and dissolved; and the hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 24 hours at the temperature of 240 DEG C and is naturally cooled to the room temperature, and solid products are collected centrifugally, sufficiently washed by deionized water, dried and subjected to thermal treatment finally to prepare the multi-edge WS2 nanosheet / graphene composite nanomaterial. The method has the advantages of simplicity and convenience and is prone to enlargement of industrial application.
Owner:ZHEJIANG UNIV
mos2 nanosheet/graphene composite nanomaterial with holes and preparation method thereof
InactiveCN104103829BGood dispersionEnhanced interactionMaterial nanotechnologyCell electrodesCysteine thiolateHydrogen atmosphere
The invention discloses a MoS2 perforated nanosheet / graphene composite nanomaterial and a preparation method thereof. The MoS2 perforated nanosheet / graphene composite nanomaterial is composited by a single layer or a few layers of MoS2 perforated nanosheets and graphene, and a substance ratio of MoS2 to graphene is (1:1)-(1:3). The preparation method of the MoS2 perforated nanosheet / graphene composite nanomaterial comprises the steps as follows: graphene oxide is ultrasonically dispersed in deionized water firstly, added with cationoid pillar [5] arene supermolecules, sufficiently stirred and then sequentially added with L-cysteine and sodium molybdate, and L-cysteine and sodium molybdate are sufficiently stirred and dissolved; and the hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 20-24 hours at the temperature of 230-250 DEG C and is naturally cooled to the room temperature and solid products are collected centrifugally, sufficiently washed by deionized water, dried and subjected to thermal treatment in nitrogen / hydrogen atmosphere to prepare the MoS2 perforated nanosheet / graphene composite nanomaterial. The method has the advantages of simplicity and convenience.
Owner:ZHEJIANG UNIV
Multi-edge ws2/graphene electrochemical magnesium storage composite electrode and preparation method
InactiveCN104103833BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesSlurryCopper foil
The invention discloses a multi-edge WS2 / graphene electrochemical magnesium storage composite electrode and a preparation method thereof. An electrochemical magnesium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared multi-edge WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil as a current collector is uniformly coated with the slurry, and after the slurry is dried, the composite electrode is obtained through rolling. The prepared multi-edge WS2 / graphene electrochemical magnesium storage composite electrode has high electrochemical magnesium storage capacity.
Owner:ZHEJIANG UNIV
A low-layer MOS 2 Preparation method of phosphorus-doped graphene electrochemical sodium storage composite electrode
ActiveCN105161691BHigh electrochemical sodium storage capacityMultiple sodium storage active sitesMaterial nanotechnologyCell electrodesPhosphonium saltNitrogen gas
The invention discloses a preparation method of a less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode. The method comprises steps as follows: S1, dispersing graphene oxide into water, adding quaternary phosphonium salt, evenly mixing the mixture, then sequentially adding molybdate and a sulfur source, and evenly mixing the mixture; S2, subjecting a mixed disperse system obtained in S1 to a hydrothermal reaction, performing cooling, performing centrifugal collection of a solid product, performing washing and drying, performing heat treatment in the argon or nitrogen atmosphere, and a less-layer MoS2 / phosphorus-doped graphene composite nanomaterial is prepared; S3, taking the composite nanomaterial obtained in S2 as an electrochemical sodium-storage substance to prepare the composite electrode. The graphene oxide, the molybeate and the sulfur source are used as raw materials, and the less-layer MoS2 / phosphorus-doped graphene electrochemical sodium-storage combined electrode is successfully prepared with a hydrothermal method, the heat treatment method and the like assisted by quaternary phosphonium salt. The method has the advantages of simplicity, convenience and easiness of industrial application enlargement.
Owner:LINGNAN NORMAL UNIV
A graphene-like mos 2 /Nitrogen, phosphorus co-doped graphene electrochemical lithium storage composite electrode preparation method
ActiveCN105304862BMultiple lithium storage active sitesEasy to expand industrial applicationMaterial nanotechnologyCell electrodesDoped graphenePhosphonium salt
The invention discloses a preparation method of a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode. The method comprises the following steps of: S1, dispersing graphene oxide in water, adding quaternary phosphonium salt to carry out uniform mixing, then sequentially adding ammonium thiomolybdate and hydrazine and carrying out uniform mixing; S2, performing a hydrothermal reaction on a mixed disperse system obtained in S1, carrying out cooling, centrifugally collecting a solid product, washing and drying the solid product, and then carrying out heat treatment in the argon or nitrogen atmosphere to prepare and obtain a graphene-like MoS2 / nitrogen and phosphorus co-doped graphene composite nano material; S3, using the composite nano material obtained in S2 as an electrochemical lithium storage active substance to prepare the composite electrode. According to the preparation method, the graphene oxide, the ammonium thiomolybdate and the hydrazine are used as raw materials and by methods of quaternary phosphonium salt assisted hydrothermal, heat treatment and the like, the graphene-like MoS2 / nitrogen and phosphorus co-doped graphene electrochemical lithium storage composite electrode is successfully prepared. The method disclosed by the invention has the advantages of simplicity, convenience and easiness in enlarging industrial application.
Owner:LINGNAN NORMAL UNIV
multi-edge mos 2 Nanosheet/Graphene Electrochemical Lithium Storage Composite Electrode and Preparation Method
InactiveCN104124434BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesComposite electrodeCopper foil
The invention discloses a multi-edge MoS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. The electrochemical lithium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano material, the ratio of the amount of substance of MoS2 to graphene in the composite nano material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80-85% of multi-edge MoS2 nanosheet / graphene composite nano material, 5-10% of acetylene black and 5-10% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano material, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil with the slurry, and rolling to obtain the composite electrode. The prepared multi-edge MoS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage volume.
Owner:ZHEJIANG UNIV
multi edge ws 2 /Graphene electrochemical lithium storage composite electrode and preparation method
InactiveCN104103810BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesLithiumComposite electrode
The invention discloses a multi-edge WS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. An electrochemical lithium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80%-85% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 5%-10% of acetylene black and 5%-10% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil is coated with the slurry, and the electrode is prepared through rolling. The prepared multi-edge WS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage capacity.
Owner:ZHEJIANG UNIV
Multi-edge ws2/graphene electrochemical sodium storage composite electrode and preparation method
InactiveCN104091954BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesCopper foilSlurry
Owner:ZHEJIANG UNIV
A graphene-like ws 2 Preparation method of nitrogen/phosphorus co-doped graphene electrochemical sodium storage composite electrode
ActiveCN105336919BEnhanced electrochemical sodium storage performanceSimple methodCell electrodesDoped graphenePhosphonium salt
The present invention discloses a graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode preparation method, which comprises: S1, dispersing graphene oxide in water, adding a quaternary phosphonium salt, uniformly mixing, sequentially adding ammonium thiotungstate and hydrazine, and uniformly mixing; and S2, carrying out a hydrothermal reaction on the mixed dispersion system obtained in the step S1, cooling, collecting the solid product through centrifugation, washing, drying, and carrying out a heat treatment in a nitrogen or argon atmosphere so as to prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene composite nanometer material; and S3, adopting the composite nanometer material obtained in the step S2 as the electrochemical sodium storage active substance to prepare the composite electrode. According to the present invention, graphene oxide, ammonium thiotungstate and hydrazine are adopted as the raw materials, and the quaternary phosphonium salt assisted hydrothermal and heat treatment method and other methods are used to successfully prepare the graphene-like WS2 / nitrogen and phosphorus do-coped graphene electrochemical sodium storage composite electrode; and the method has advantages of simpleness, convenience, and easy industrial application expanding.
Owner:LINGNAN NORMAL UNIV
Multi-edge WS2 nanosheet/graphene composite nanomaterial and preparation method
InactiveCN104103818AGood dispersionImprove bindingMaterial nanotechnologyCell electrodesIonic liquidSubstance Ratio
The invention discloses a multi-edge WS2 nanosheet / graphene composite nanomaterial and a preparation method thereof. The multi-edge WS2 nanosheet / graphene composite nanomaterial is composited by multi-edge WS2 nanosheets with a few layers and graphene, and a substance ratio of WS2 nanosheets to graphene is (1:1)-(1:4). The preparation method comprises the steps as follows: graphene oxide is ultrasonically dispersed in deionized water firstly, added with an ionic liquid, sufficiently stirred and then sequentially added with L-cysteine and ammonium thiotungstate, and L-cysteine and ammonium thiotungstate are sufficiently stirred and dissolved; and the hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 24 hours at the temperature of 240 DEG C and is naturally cooled to the room temperature, and solid products are collected centrifugally, sufficiently washed by deionized water, dried and subjected to thermal treatment finally to prepare the multi-edge WS2 nanosheet / graphene composite nanomaterial. The method has the advantages of simplicity and convenience and is prone to enlargement of industrial application.
Owner:ZHEJIANG UNIV
multi-edge mos 2 Nanosheet/Graphene Electrochemical Magnesium Storage Composite Electrode and Preparation Method
InactiveCN104091925BGood dispersionImprove bindingMaterial nanotechnologyCell electrodesNanomaterialsCurrent collector
The invention discloses a multi-edge MoS2 nano piece / graphene electrochemical magnesium storage composite electrode and a preparation method thereof, wherein an electrochemical magnesium storage active substance is a composite nanomaterial of few layers of multi-edge MoS2 nano pieces and graphene; the ratio of the amount of substance of MoS2 to the graphene in the composite nanomaterial is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of the multi-edge MoS2 nano piece / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps of firstly, preparing the multi-edge MoS2 nano piece / graphene composite nanomaterial, mixing the obtained composite nanomaterial with the acetylene black and the polyvinylidene fluoride to prepare even paste, evenly coating foamy copper taken as a current collector with the paste, drying, and rolling to obtain the electrochemical magnesium storage composite electrode. The electrochemical magnesium storage composite electrode has the high electrochemical magnesium storage capacity.
Owner:ZHEJIANG UNIV
mo 0.5 w 0.5 s 2 Nanotile and graphene composite nanomaterial and preparation method
InactiveCN104091933BGood dispersionSufficiently hydrophilicMaterial nanotechnologyCell electrodesNitrogen gasLithium-ion battery
The invention discloses a Mo0.5W0.5S2 nanotile and graphene composite nanomaterial and a preparation method thereof. The Mo0.5W0.5S2 nanotile and graphene composite nanomaterial is formed by compounding a Mo0.5W0.5S2 nanotile with few layers and graphene, wherein the mass ratio of the Mo0.5W0.5S2 nanotile to graphene ranges from 1 to 1-1 to 4. The preparation method comprises the following steps of firstly, ultrasonically dispersing graphene oxide into deionized water; then, adding a gemini surfactant, and sufficiently stirring; next, sequentially adding L-cysteine, ammonium thiomolybdate and ammonium thiotungstate, and sufficiently stirring to dissolve L-cysteine, ammonium thiomolybdate and ammonium thiotungstate; and transferring the mixed dispersion system into a hydrothermal reaction kettle to carry out hydrothermal reaction at the temperature of 230-250 DEG C for 20-24h, then, naturally cooling to the room temperature, centrifuging to collect a solid product, sufficiently washing with deionized water, drying, and finally, carrying out heat treatment at a nitrogen and hydrogen mixed atmosphere to obtain the Mo0.5W0.5S2 nanotile and graphene composite nanomaterial. The method disclosed by the invention has the characteristics of simplicity and convenience; in addition, no organic solvent is needed to be consumed. The prepared composite nanomaterial is widely applied as a lithium ion battery electrode material and an electrocatalytic material.
Owner:ZHEJIANG UNIV
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