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180results about How to "Excellent electrochemical properties" patented technology
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Negative electrode active material and use of secondary lithium battery
The invention has a grain structure with an outer shell and several inner cores. The grain size is from 100 nanometers to 100 microns. The inner cores are compound grain that includes active substance and conducting additive. The outer shell is a carbon layer. The active substance takes 20-95wt% of total cathode active material, and is mixture of one or several transition metallic compound selected from silicon and lithium storage whose thermodynamic equilibrium potential is less than 1.5v. The cathode material can be made by using mechanical process or thermal method, and can be directly used as cathode material or used with other existing cathode material.
Owner:LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
Graphene-coated mesoporous metallic oxide, and preparation method and use thereof
InactiveCN102437320AHigh charge and discharge capacityImprove cycle performanceCell electrodesMesoporous silicaSilicon dioxide
The invention relates to a graphene-coated mesoporous metallic oxide, and a preparation method and use thereof. The preparation method for the graphene-coated mesoporous metallic oxide comprises the following steps of: 1) synthesizing mesoporous metallic oxides with different pore passage structures by taking mesoporous silicon dioxides with the different pore passage structures as templates; 2) preparing a graphene oxide by using an oxidation method; 3) absorbing mesoporous metallic oxide particles on the surface of the graphene oxide by using a heterocoagulation method; 4) reducing the graphene oxide into graphene by adding a reducing agent; and 5) performing centrifugal separation, washing and drying. The graphene-coated mesoporous metallic oxide provided by the invention has high electrochemical properties, and can be used as an electrode material of a lithium battery.
Owner:BEIJING NORMAL UNIVERSITY
Positive electrode material of lithium ion battery and preparing method thereof
ActiveCN103151521AReduce the effect of tap densityImprove cycle performanceCell electrodesSodium-ion batteryIron phosphate
The invention relates to a lithium titanate-carbon co-cladded lithium manganese iron phosphate positive electrode material. According to the invention, the characteristic of zero stress of a lithium titanate material is utilized for inhibition of deformation of a positive electrode during charging and discharging so as to improve cycle performance and resistance to over-charge and over-discharge of the positive electrode material, and conductivity and electrochemical properties of the positive electrode material are improved through co-cladding of the lithium titanate material and carbon; meanwhile, tap density of lithium titanate is as high as 1.68 g / cm<3>, which enables influence of carbon cladding on the tap density of the positive electrode material to be reduced. A preparation method for the positive electrode material provided by the invention is simple, is easy to operate and can easily realize industrial application.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Preparation method and applications of graphene aerogel
The invention provides a preparation method and applications of graphene aerogel. The graphene aerogel is prepared by the following steps: oxidizing a graphene water solution, and then preparing the graphene aerogel through a hydrothermal method. The graphene aerogel can be used as an ion-selective electrode, and can be especially used as an ion-selective electrode to detect the nitrate ions. The graphene aerogel is innovatively used as an ion-selective electrode applied in electrochemical detection, the detection results are excellent, and the application range of graphene aerogel based materials is enlarged.
Owner:JIANGSU UNIV
Method for preparing anode material of ferroferric oxide and carbon composite lithium battery
InactiveCN102623692ASmall particle sizeLarge specific surface areaCell electrodesCarbon compositesOxide composite
Owner:XINJIANG UNIVERSITY
Lithium-sulfur battery positive-pole composite material with imitated cellular structure and preparation method thereof
ActiveCN105514378AGood electrical conductivityImprove conductivityCell electrodesLi-accumulatorsSurface-active agentsOxide
The invention discloses a lithium-sulfur battery positive-pole composite material with an imitated cellular structure and a preparation method thereof. In the positive-pole composite material, a conductive polymer film layer and nanometer oxide inlaid inside the conductive polymer film layer form a cell membrane, an elemental sulfur particle serves as a cell nucleus, and the three portions jointly form the imitated cellular structure. The composite material is prepared by conducting ultrasonic dispersion on the elemental sulfur particle and the nanometer oxide in water in the presence of a surface active agent, adding a conductive polymer monomer and an acid solution, performing even stirring and then adding an oxidizing agent to perform stirring reaction. The preparation method is simple in process, low in cost, low in energy consumption, controllable in sulfur content and good in repeatability and enables large-scale production to be easily achieved. The composite material is made into a lithium-sulfur battery positive pole, loss of active substances in the charging-discharging process can be effectively inhibited, improvement of the specific discharge capacity of a battery material and the utilization ratio of the active substances is facilitated, and accordingly the battery cycle performance is greatly improved.
Owner:XIANGTAN UNIV
Thermal stable and super-hydrophobic ceramic-carbon nanotube composite membrane and application of membrane distillation water treatment thereof
ActiveCN107096393ALow resistance transmissionGuaranteed bondingMembranesGeneral water supply conservationReaction temperatureCarbon nanotube
The invention relates to a thermal stable and super-hydrophobic ceramic-carbon nanotube composite membrane and application of membrane distillation water treatment thereof, and belongs to the technical field of inorganic membranes. The composite membrane is prepared by the following steps of adopting a chemical vapor deposition method, using a ceramic hollow fiber membrane as a carrier, changing the different preparation conditions, such as a loading amount of a catalyst, reaction temperature and reaction time, and controlling the structure, loading amount and load state of the carbon nanotube, so as to obtain the ceramic-carbon nanotube hollow fiber composite membrane with different structures and properties. The composite membrane has the advantages that by regulating and optimizing the preparation conditions, the thermal stable and super-hydrophobic composite membrane with a carbon nanotube complete covering structure is obtained; the seawater freshening, high-salt wastewater zero drainage, and other wastewater high-efficiency treatment, such as electroplating heavy metal wastewater, dyeing and printing wastewater and antibiotic wastewater, can be realized via the composite membrane; and the good membrane distillation property is realized.
Owner:DALIAN UNIV OF TECH
Preparation method for carbon/tin/graphene composite nanofibers for lithium ion battery
InactiveCN106159210ASimple preparation processReduce manufacturing costCell electrodesNanotechnologyFiberHigh rate
The invention discloses a preparation method for carbon / tin / graphene composite nanofibers for a lithium ion battery, and belongs to the technical fields of nanomaterials and a chemical power supply. The preparation method comprises the steps of dissolving polyacrylonitrile, stannous chloride and graphene into N, N-dimethylformamide, and stirring uniformly to form a spinning solution; then preparing a polyacrylonitrile / stannous chloride / graphene composite nanofiber membrane through an electrospinning technique; and carrying out carbonization to obtain the carbon / tin / graphene composite nanofiber negative electrode material. The preparation process provided by the invention is simple, and the production cost is low; the composite nanofiber material prepared by the invention is used for the negative electrode material of the lithium ion battery, and the material has an excellent electrochemical property, a good cycling performance and high rate capability; the shortcoming of a poor cycling performance of a tin-based negative electrode material is overcome; and therefore, the carbon / tin / graphene composite nanofibers, which can used as the new generation of the negative electrode material of the lithium ion battery, can be widely applied in portable equipment.
Owner:JIANGNAN UNIV
Method for preparing high-performance carbon material from molasses
The invention discloses a method for preparing a high-performance carbon material from molasses. The method comprises the following concrete steps: firstly, subjecting beet molasses with sugar-containing concentration of 8.8% to 52.5% to dehydration and carbonization for 2 to 10 h under the condition of 120 to 180 DEG C, carrying out washing and then carrying out drying for 12 h under the condition of 120 DEG C so as to obtain a colloidal carbon sphere with a size of 1 [mu]m to 10 [mu]m, then pretreating the obtained colloidal carbon sphere for 1 h under the condition of 500 DEG C, then carrying out activating treatment with concentrated phosphoric acid or KOH, subjecting an obtained product to washing until the pH is equal to 6 to 7, then carrying out drying for 12 h under the condition of 120 DEG C, and carrying out heating treatment for 1 h under the condition of 800 DEG C by filling of nitrogen so as to obtain a porous carbon material. The invention has the following beneficial effects: the colloidal carbon prepared from the molasses by hydrothermal treatment, after regulation of the KOH, has more developed porosity, can maintain morphology of the carbon sphere, and has a particle size of 1 [mu]m to 10 [mu]m; whether the colloidal carbon is regulated by the phosphoric acid or etched by potassium hydroxide, the obtained porous carbon material has high yield and small loss; and specifically, the porous carbon prepared from phosphoric acid has a yield up to 79.2%.
Owner:JILIN UNIV
Isomorphous, high performance cobalt nickel @ cobalt nickel core-shell structure material and preparation method and application thereof
InactiveCN107293414AImprove diffusion and mass transfer performanceFast transferMaterial nanotechnologyHybrid capacitor electrodesNickel saltCobalt salt
The invention discloses an isomorphous, high performance cobalt nickel @ cobalt nickel core-shell structure material and a preparation method and application thereof. The preparation method of the isomorphous, high performance cobalt nickel @ cobalt nickel core-shell structure material comprises the following steps: 1) pre-treating the foam nickel; 2) mixing the nickel salt, cobalt salt, urea and solvent to prepare a solution A, then placing the solution A in an airtight condition to carry out hydrothermal reaction, and then separating the solid and the liquid and performing washing and drying on the separated solid to prepare the foam nickel covered with precursor; 3) mixing the nickel salt, cobalt salt, six methylene four amine (MHT) and the solvent to prepare a solution B, then placing the foam nickel covered with precursor and the solution B in an airtight condition to carry out hydrothermal reaction, and then separating the solid and the liquid and performing washing, drying and calcining to obtain the isomorphous and high performance NiCo2O4 @ NiCo2O4 core-shell structure material. The cobalt nickel @ cobalt nickel core-shell structure material prepared through the method has excellent electrochemical performances.
Owner:ANHUI NORMAL UNIV
Flexible fabric electrode as well as preparation method and application thereof
ActiveCN110060885AExcellent electrochemical propertiesImprove adhesionCarbon compoundsHybrid capacitor electrodesFiberNanoparticle
The invention belongs to the technical field of supercapacitors, and particularly relates to a flexible fabric electrode as well as a preparation method and application thereof. According to the method, the cleaned fiber fabric is subjected to interface modification by dopamine, and a porous interface layer composed of polydopamine nanoparticles is formed on the fiber fabric; then an electrochemical active material is loaded by utilizing the excellent adhesion of the porous interface layer, so that the adhesion effect of the active material and the fiber fabric substrate is enhanced; and finally the flexible fabric electrode with high loading capacity, large specific surface area and high conductivity is obtained through high-temperature carbonization. The method is simple and efficient, and a universal method for functionalization of the fabric electrode is provided. The surface of the existing fabric is changed by the simple method, the low-cost fabric on the market is converted intothe flexible wearable supercapacitor with excellent electrochemical performance, so that the flexible fabric electrode has wide application in flexible energy storage.
Owner:SOUTH CHINA UNIV OF TECH
Surface-modified manganese dioxide product loaded by N-doped hollow carbon sphere, preparation method of surface-modified manganese dioxide product loaded by N-doped hollow carbon sphere, and application of surface-modified manganese dioxide product loaded by N-doped hollow carbon sphere
InactiveCN107946085AImprove performanceImprove reducibilityHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceNitrogen
The present invention discloses a preparation method of a surface-modified manganese dioxide (MnO2) product loaded by an N-doped hollow carbon sphere (N-HCS). The method comprises the following stepsof: (1) preparing a hollow carbon sphere (HCS); (2) preparing a polydopamine-modified hollow carbon sphere (PDA-HCS); (3) preparing a graphene-modified N-doped hollow carbon sphere (N-HCS@Gr); (4) preparing a polyaniline-modified N-HCS@Gr (N-HCS@Gr@PANI); and (5) preparing a surface-modified MnO2 product loaded by an N-doped hollow carbon sphere (N-HCS@Gr@PANI@MnO2). The N-HCS@Gr@PANI@MnO2 productfully combines excellent performances of the N-doped hollow carbon sphere, a large superficial area and an excellent conductivity of graphene, reductibility and conductivity of the PANI and excellentcapacitance characteristics of the MnO2 itself, and therefore, the N-HCS@Gr@PANI@MnO2 product expresses very high specific capacitance and is electrode material of a super electrochemical capacitor with a wide application prospect.
Owner:HUNAN UNIV OF SCI & TECH
Preparation method of high-molecular-weight polylactic acid stereoscopic compound
InactiveCN103254461AImprove thermal stabilityExcellent electrochemical propertiesSolventThermal stability
The invention discloses a preparation method of a high-molecular-weight polylactic acid stereoscopic compound. The high-molecular-weight polylactic acid stereoscopic compound comprises the following raw materials in parts by weight: 2-30 parts of levorotatory polylactic acid, 2-30 parts of dextrorotary polylactic acid and 50-95 parts of ionic liquid. The stereoscopic compound is characterized by being obtained in a way that the levorotatory polylactic acid and the dextrorotary polylactic acid are formed into gel in the ionic liquid. The method disclosed by the invention is simple, practical and easy to operate, and thus can realize industrial large-scale continuous production. Meanwhile, according to the difference of the required materials in performance, inorganic filler can be additionally added. Compared with conventional solvent, the ionic liquid has non-volatility, high ionic conductivity and heat stability. Thus, the polylactic acid ionic gel can also be used as a solid electrolyte, and is hopefully used in the aspects of battery diaphragms, artificial intelligent drivers and the like.
Owner:EAST CHINA UNIV OF TECH
Preparation method and application for delta-MnO2 thick film pseudocapacitor electrode
InactiveCN105355462AIncrease loadIncrease surface areaHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceFiber
The invention discloses a preparation method for a delta-MnO2 thick film pseudocapacitor electrode. The preparation method comprises the following steps of immersing carbon fiber paper into a potassium permanganate solution for 0.5 hour, then performing hydrothermal growth to form a GZO nanowire array to be used as a three-dimensional framework, and finally performing positive electrode disposition in different times on the framework with high conductivity to obtain the delta-MnO2 thick film. The synthetic method provided by the invention is simple, and low in cost; and the obtained pseudocapacitor electrode is high in quality specific capacitance and area specific capacitance, relatively high in potential window and high in the cycling stability.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method and application of primordial water hyacinth biomass carbon porous electrode material
ActiveCN109850896ARich and well-developed pore structureGood chemical stabilityCarbon compoundsWater contaminantsPerturbateurs endocriniensPorous electrode
The invention belongs to the technical field of a preparation and application of a primordial water hyacinth biomass carbon material with a porous structure, and specifically discloses a preparation method of a novel electrode material and an application of the electrode material as a cathode in an electro-Fenton system to degrade endocrine disruptors. The electrode material takes water hyacinth biomass powder as a precursor, zinc chloride powder is added in different proportions to perform activating, the novel biomass carbon material is prepared by high temperature calcination under the protection of an inert gas, and finally a porous electrode is obtained as the cathode material for E-Fenton to degrade endocrine disruptors. The material has relatively good electrical conductivity and relatively large specific surface area. The material can be used as a novel electrode material, and a good degradation effect is especially shown in the electro-Fenton experiment.
Owner:SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
Dual-metal hydroxide@ nickel molybdate@ graphene nanocomposite and preparation method and application thereof
ActiveCN107680821AImprove conductivityFacilitated DiffusionMaterial nanotechnologyHybrid capacitor electrodesDispersityCapacitance
The invention provides a dual-metal hydroxide@ nickel molybdate@ graphene nanocomposite and a preparation method and an application thereof. Compared with the prior art, the preparation method disclosed in the invention achieves high product purity, high dispersity, high crystalline form and controllability, low production cost and high reproducibility; the prepared dual-metal hydroxide@ nickel molybdate@ graphene nanocomposite is grown on carbon cloth and can be directly used as a flexible electrode material of a supercapacitor, so that high stability, high specific capacitance, high energy density and power density are realized; and in addition, the carbon cloth has the flexible electrode and foldable and wearable properties, so that the nanocomposite has infinite development in the future wearable electrochemical energy storage equipment.
Owner:ANHUI NORMAL UNIV
Colloid electrolyte for lead-acid battery and preparation method thereof
InactiveCN102208690APlay a thickening roleAvoiding the Drawbacks of Hydration StratificationFinal product manufactureLead-acid accumulators constructionHYDROSOLOxygen
The invention belongs to the technical field of colloid lead-acid battery electrolytes and relates to a novel colloid electrolyte for a lead-acid battery and a preparation method thereof. In the colloid electrolyte, a silica sol is taken as a gel and contains 0.001%-0.009% of hydroxyethyl cellulose. The preparation method comprises the following steps: 1, preparing a hydroxyethyl cellulose water solution with the mass percent of 0.05%-0.5%; 2, preparing silicon dioxide into a silica sol and adding the silica sol to a sulfuric acid solution as well as stirring; and 3, adding the hydroxyethyl cellulose water solution in the step 1 to the solution obtained in the step 2, and dispersing. The hydroxyethyl cellulose is adopted to be an additive of the silica solution colloid electrolyte, thus playing a thickening role in a pure silica solution electrolyte, avoiding the defect of hydration layering of the pure silica solution colloid electrolyte, improving the stability of the pure silica solution colloid electrolyte, inhibiting the colloid electrolyte from hydrogen evolution and oxygen evolution to reduce self discharge, increasing the discharge capacity of a lead negative electrode, improving the charge acceptance of the lead negative electrode, restraining sulfation of the negative electrode and being beneficial to prolonging the service life of the battery.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Copper oxide@nickel molybdate/ foamed copper composite electrode material and preparation method thereof
InactiveCN109786135AIncrease capacitanceExcellent and stable electrochemical propertiesMaterial nanotechnologyHybrid capacitor electrodesCapacitanceMetallic materials
The invention relates to a copper oxide@nickel molybdate / foamed copper composite electrode material and a preparation method thereof, and belongs to the field of an inorganic non-metal material. A nickel-molybdate precursor is coated on a copper hydroxide nanowire on a surface of foamed copper in an in-situ way and is calcined under an atmosphere of inert gas to obtain the copper oxide@nickel molybdate / foamed copper composite electrode material with a core-shell structure. The core-shell nanowire array structure is directly grown on the foamed copper and is used as a positive electrode of asupercapacitor. Copper oxide is used as a core, nickel molybdate is used as a shell coated on the surface of the copper oxide, the active sites participating the electrochemical process are increased,and the capacitance value of the electrode material is improved. The material is simple in preparation process, has excellent and stable electrochemical performance, is suitably used as the electrodematerial of the supercapacitor and has wide application space in the field of the electrode material of the supercapacitor.
Owner:JILIN UNIV
Sodium ion battery negative electrode material and preparation method thereof
InactiveCN109768239AShorten the diffusion distanceIncrease contact areaCell electrodesSecondary cellsCarbon layerNanowire
The invention belongs to the technical field of sodium ion batteries, and particularly relates to a sodium ion battery negative electrode material and a preparation method thereof. The sodium ion battery negative electrode material is a composite material formed by coating an antimony sulfide nanowire with a nitrogen-doped carbon layer; the obtained composite material is used for a sodium ion battery, and by virtue of the controllable synthesis method and a stable structure, the electrochemical capacity and the cycling performance of the sodium ion battery are effectively improved, the defectsof an existing electrode material are overcome, and the cycling performance of the battery is effectively improved. The method comprises the following steps of synthesizing the antimony sulfide nanowire through a one-step hydrothermal method firstly, then enabling dopamine to be uniformly loaded on the antimony sulfide nanowire through a reaction, and finally obtaining the composite material formed by coating the antimony sulfide nanowire with the nitrogen-doped carbon layer through heat treatment.
Owner:INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
Graphene-based flexile self-support mixed gel electrode and preparation method thereof
InactiveCN108390064AUnique two-dimensional structureExcellent ElectricalElectrode manufacturing processesHybrid capacitor electrodesState of artFiltration
The invention relates to a graphene-based flexile self-support mixed gel electrode and a preparation method thereof. In preparation, graphene oxide is reduced by adopting a hydrothermal method firstlyto obtain a graphene dispersion liquid; next, an active material and the graphene dispersion liquid are mixed uniformly to obtain a mixed dispersion object; and finally, the mixed dispersion object is subjected to suction filtration and washing to obtain the graphene-based flexile self-support mixed gel electrode. Compared with the prior art, graphene is adopted in the invention to replace a conductive agent, a binder and a current collector in the conventional electrode, so that the a self-support mixed gel electrode thin film with high flexibility is obtained; and the electrode has excellent specific capacity and rate capability, can be applicable to multiple active materials and solution systems, and has relatively high application prospect in the fields of a battery, a supercapacitorand other energy storage systems or other functional composite materials.
Owner:TONGJI UNIV
Preparation method of bi-metal selenide sodium-ion battery cathode material
ActiveCN110752356AExcellent electrochemical propertiesPromotes electrochemical reactionsNegative electrodesSecondary cellsElectrical batterySodium-ion battery
The invention relates to a preparation method of a bi-metal selenide sodium-ion battery cathode material. According to the preparation method, an MoSe2@CoSe2@C heterostructure is synthesized through asimple process so as to realize the aim of enhance the electrochemical performance of the sodium-ion batteries. According to the method, an MoO3 nanorod is firstly synthesized, a layer of Co-MOF nanosheet is grown on the surface of the MoO3 nanorod, and high-temperature selenylation calcination is carried out to obtain a core-shell structure with a uniform heterogenous interface, so that the iondiffusion kinetics can be improved and the electron conductivity can be improved, thereby improving the electrochemical performance of the batteries. Compared with the pure MoSe2, an SIB taking the MoSe2@CoSe2@C heterostructure as a cathode shows a remarkably improved specific capacity and excellent cycling stability and rate performance.
Owner:INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
Platinum green light material containing Schiff base ligand and preparation method of platinum green light material
ActiveCN106632489AGood thermal stabilityGood electrochemical propertiesSolid-state devicesSemiconductor/solid-state device manufacturingDecompositionSchiff base
The invention relates to synthesis and property determination of a novel Schiff base ligand and complex and belongs to the field of coordination chemistry of inorganic chemistry, and the Schiff base complex can effectively realize green light emission. A molecular formula of a monomer is C19H20BrClF3NO2PtS, with the molecular weight of 693.87; PtL.DMSO is a 2,4,5-trifluoroaniline5-tert-butyl-3-bromosalicylaldehyde platinum complex and belongs to a monoclinic system, and a space group is P(2)1 / n; lattice parameters are shown as follows: a=10.594(3)angstrom, b=8.767(3) angstrom, c=24.400(7) angstrom, alpha=gamma=90.00 degrees, and beta=95.451(4) degrees. According to the designed novel Schiff base platinum complex luminescent material, the maximum ultraviolet absorption wavelength is 442 nm, the maximum phosphorescent emission wavelength is 606 nm, and the decomposition temperature is 248 DEG C. The novel complex is convenient to synthesize, can be prepared by a simple instrument, has good heat stability and is not prone to decomposition at the high temperature.
Owner:TAIZHOU UNIV
Preparation method of capacitor material having 3D hollow structure and application thereof
ActiveCN108695076ALarge structural surface areaExcellent electrochemical propertiesMaterial nanotechnologyHybrid capacitor electrodesVulcanizationNanowire
The invention, which belongs to the technical field of energy material preparation, relates to a preparation method for growing a NiCo2S4 nanowire by using silk as a substrate to form a capacitor material. The specific preparation process comprises: growing a nickel-cobalt precursor on silk; carrying out hydrothermal vulcanization treatment on the obtained nickel-cobalt precursor to remove the silk and thus forming a hollow structure; and then carrying out oxidative calcination treatment to obtain a capacitor material having a 3D hollow structure. According to the invention, the spinous structure of the NiCo2S4 nanowire is kept well; a large specific surface area and more active sites are provided; the electron / ion in the electrolyte solution can be absorbed conveniently, so that the electrochemical performance of the material becomes excellent and stable. In addition, the hollow structure has the diameter of 8 to 9 nm and thus a convenient passage is provided for electron / ion transport, so that the reaction is carried out continuously and effectively. The prepared capacitor material having the excellent electrochemical performance and the outstanding cycle stability is a potentialmaterial and has broad application prospects.
Owner:QINGDAO UNIV
Preparation method and application of three-dimensional multi-dimension porous crystal titanium carbide
ActiveCN107640772AHighly corrosiveImprove uniformityHybrid capacitor electrodesCell electrodesCapacitanceTwo dimensional crystal
The invention discloses a preparation method and application of three-dimensional multi-dimension porous crystal titanium carbide, relates to a preparation method and application of crystal titanium carbide, and aims to solve the problem that existing two-dimensional crystal titanium carbide is liable to stack, and especially has low mass specific capacitance when the mass is relatively large. Themethod comprises the following steps: I, preparing a two-dimensional layered titanium carbide nanosheet; II, calcining to obtain the three-dimensional multi-dimension porous crystal titanium carbide.The mass specific capacitance of the three-dimensional multi-dimension porous crystal titanium carbide prepared by the method is about 129F / g when the mass is 10mg. By adopting the preparation method, the three-dimensional multi-dimension porous crystal titanium carbide can be obtained.
Owner:HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for preparation of flexible self-support electrode with graphene as conductive binder and electrode
InactiveCN108390063AUnique two-dimensional structureExcellent ElectricalElectrolytic capacitorsHybrid capacitor electrodesSlurryCalcination
The invention relates to a method for preparation of a flexible self-support electrode with graphene as a conductive binder and an electrode. The preparation method includes: firstly mixing a grapheneoxide solution with an electrode active material evenly to obtain a mixed slurry; then drying the mixed slurry to obtain a three-dimensional aerogel; then molding the three-dimensional aerogel; and then conducting high-temperature calcination under gas protection so as to obtain the flexible self-support electrode. Compared with the prior art, the method provided by the invention uses graphene toreplace the conductive agent, binder and current collector used in the traditional electrode, and acquires a good flexibility self-support electrode film, which can be applicable to a variety of active materials and solution systems, and has great application prospects in batteries, supercapacitors and other energy storage systems or other functional composite material fields.
Owner:TONGJI UNIV
Nickel doped cobaltosic oxide nanometer flower-shaped composite material, preparation method and application thereof
ActiveCN107162066AStable in natureGood natureCell electrodesSecondary cellsAlcoholCobalt(II,III) oxide
The invention discloses a nickel doped cobaltosic oxide nanometer flower-shaped composite material, a preparation method and an application thereof. The method comprises the following steps: dissolving a nickel solution in ethyl alcohol, dissolving a cobalt salt into a mixed solution of the ethyl alcohol and water and performing ultrasonic treatment for a period of time; and then, mixing the two solutions, stirring, adding urea in the stirring process and stirring for a period of time, wherein the doped volume of nickel is 0.9%-2.3% by mole fraction; after uniformly stirring, transferring into a polytetrafluoroethylene reaction kettle for performing hydrothermal reaction; after completing the reaction, washing and drying, thereby acquiring a nickel doped cobaltosic oxide nanometer flower-shaped composite material. The nickel doped cobaltosic oxide nanometer flower-shaped composite material is high in product stability and stable in property, not only has excellent properties of cobaltosic oxide nanometer oxide but also can promote the conductivity. The preparation method is characterized by simple operation, low raw material cost, low reaction temperature, excellent electrochemical property and wide application in the fields of catalysis, sensing and energy storage.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
Preparation method of silicon doping carbon quantum dots by adoption of solvothermal method and applications thereof
InactiveCN103834396AHigh fluorescence quantum yieldLow toxicityMicrobiological testing/measurementNano-carbonProcess equipmentHydroquinone Compound
The invention relates to the field of carbon quantum dot preparation, and particularly relates to a preparation method of silicon doping carbon quantum dots by adoption of a solvothermal method and applications thereof. The preparation method includes: adding hydroquinone into a stainless steel high-pressure reactor the liner of which is polytetrafluoroethylene; adding acetone according to a ratio that 5 mL of the acetone is added for per 0.97 g of the hydroquinone; adding dropwise silicon tetrachloride into the reactor, putting the sealed reactor in an air dry oven, heating at 150-220 DEG C for 1-5 h, cooling to room temperature, and concentrating and evaporating the liquid mixture in the reactor to dryness by adoption of a rotary evaporation manner to obtain the silicon doping carbon quantum dots. The preparation method is simple, efficient and mild, and is low in operation cost and simple in preparation process equipment. The prepared silicon doping carbon quantum dots can be applied in cell biological imaging.
Owner:ZHEJIANG NORMAL UNIVERSITY
Solid-phase catecholamine extraction functional composite material and preparation method and application thereof
ActiveCN108452784AEasy to operateWide applicabilityComponent separationOther chemical processesSolid phasesGraphene nanoparticles
The invention discloses a solid-phase catecholamine extraction functional composite material with magnetic 3D graphene nanoparticles as a core. A functional polymer, which is arranged on the surface of the solid-phase catecholamine extraction functional composite, is mainly synthesized from ethyl orthosilicate, trimethoxysilylpropanethiol and atropic acid, has a specific affinity site for catecholamines and is of a crosslinked network-like structure. Accordingly, the invention also provides a corresponding preparation method. The solid-phase extraction functional composite material is used foradsorption and dynamic extraction and separation of catecholamines such as trace adrenaline, which are illegally added in the pretreatment of cosmetic samples with complex matrix, and can be appliedto rapid separation and detection of catecholamines. The preparation method is simple, the cost is low, the recovery rate is high, the relative standard deviation is small, and the method has the characteristics of less use of organic solvents and convenient, fast and efficient solid phase extraction operation.
Owner:GUANGXI UNIV FOR NATITIES
Chromium-base negative electrode active material for secondary lithium battery
InactiveCN1773752AHigh reversible capacityImprove cycle performanceActive material electrodesLi-accumulatorsCarbon filmGraphite
A Cr based negative electrode active material used on secondary lithium cell is oxide Cr2 ¿C xMxO3 of transition metal Cr doped with varied atoms as 0.001 not greater than x not greater than 1.5, M being li, Ag, mg, Ni, Cu, Zn, Sn, Co, Fe, Ca, Sr, Ti, Mn , Ce, Mo or Zr, material particle diameter being 50nm to 20 micron. The said material also can include conductive additives with the amount of 1 ¿C 20 wt% to said material, or can have carbon film shell on said material core, or can apply 20 ¿C 98 wt % ratio to mix with existing negative electrode material for being used as negative electrode material of secondary lithium cell.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Asymmetric electrochemical capacitor and preparation method of asymmetric electrochemical capacitor
ActiveCN103050291AHigh specific capacitanceImprove cycle performanceHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceHigh energy
The invention provides an asymmetric electrochemical capacitor and a preparation method of the asymmetric electrochemical capacitor. The prepared asymmetric electrochemical capacitor comprises a positive electrode, a negative electrode, electrolyte, a diaphragm and a current collector, wherein the positive electrode is made of p-BC@MnO2, and the negative electrode is made of p-BC / N, wherein the p-BC is pyrolyzed bacterial cellulose. The asymmetric electrochemical capacitor provided by the invention has the advantages that the bacterial cellulose with low cost and rich yield is used as electrode raw materials, the prepared asymmetric electrochemical capacitor has high specific capacitance, good cyclicity and high stability, and high energy density and power density are realized.
Owner:UNIV OF SCI & TECH OF CHINA
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