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32results about How to "Increase the electrochemical reaction area" patented technology
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Electrolytic tank and application for electrochemical reduction reaction of carbon dioxide
ActiveCN105316700AImprove the electrochemical reaction speedIncrease the electrochemical reaction areaCellsElectrolytic organic productionElectrochemical responseVapor–liquid separator
The invention discloses an electrolytic tank and application for an electrochemical reduction reaction of carbon dioxide. The electrolytic tank comprises a cathode chamber, an anode chamber and a gas-liquid separator, wherein the cathode chamber is divided into an upper cavity and a lower cavity; the lower cavity is a container with an open upper end, and the upper cavity is a container with an open lower end; the upper cavity is disposed above the lower cavity; first flange plates are disposed at the opening ends of the two cavities respectively; the two cavities are connected through the first flange plates. Compared with a traditional H-type electrolytic tank, the electrolytic tank can remarkably increase the converting rate of the carbon dioxide and improve electrochemical reaction speed and is easy to operate, and the calculation is convenient.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Lead-carbon battery for motorcycle and preparation method thereof
ActiveCN104835965AGood for high rate dischargeImprove charge acceptanceLead-acid accumulator electrodesFiberPower flow
The invention discloses a lead-carbon battery for a motorcycle. The lead-carbon battery comprises positive grid, a positive lead plaster coated on the positive grid, a negative grid and negative lead plaster coated on the negative grid, wherein the positive lead plaster is prepared from the following raw materials in parts by weight: 100 parts of lead powder, 9-10 parts of dilute sulfuric acid which is 1.400 in density, 0.02-0.03 part of short fiber, 0.15-0.3 part of graphite and 13-14 parts of purified water; and the negative lead plaster is prepared from the following raw materials in parts by weight: 100 parts of lead powder, 0.95-1.15 parts of expanding agent, 1-4 parts of complex carbon material, 7-8 parts of dilute sulfuric acid which is 1.400 in density, 0.015-0.025 part of short fiber and 11-14 parts of purified water. The positive and negative active substance utilization ratio of the prepared lead-carbon battery for the motorcycle is increased by 15-25 percent in comparison to a conventional battery. When the battery is started for discharging at large current at the multiplying power of 8-10 times, the output power is stable.
Owner:QINGYUAN KAIJIE POWER SUPPLY CO LTD
A nanometer Zn @ C negative electrode material for secondary zinc-based battery and preparation method thereof
InactiveCN109119604ALarge specific surface areaIncrease the electrochemical reaction areaMaterial nanotechnologyCell electrodesSolventCrystallite
The invention belongs to the battery material field, in particular to a nanometer Zn @ C negative electrode material for a secondary zinc-based battery and a preparation method thereof. C in the negative electrode material is a nano carbon material, the thickness of the negative electrode material is 50-100 [mu]m and a Zn grain size is 20-80 nm; the preparation method comprises the following steps: adding nano-carbon material into nano-zinc plating solution for electroplating, then washing with water and drying to obtain the nano-Zn @ C negative electrode material; DC, high frequency forward pulse current or high frequency bi-directional pulse current can be used for electroplating; The nanometer zinc plating solution comprises zinc sulfate, boric acid and grain refiner, the pH value is 1to 3, and the solvent is water. The negative electrode material prepared by the invention has good adhesion, no zinc shedding after 20 times of 90 DEG bending tests, strong dendritic growth inhibitionability, excellent specific capacity, cycle life, coulomb efficiency and magnification performance, and is proved to be good in effect by magnification test and suitable for large-scale industrial production.
Owner:JINAN UNIVERSITY
Fuel cell electrode with catalyst growing on ordered structure microporous layer in situ and preparation method of membrane electrode
ActiveCN112331858AImprove stabilityReduce transmission resistanceCell electrodesFuel cellsPtru catalystNanowire
The invention discloses a fuel cell electrode with a catalyst growing on an ordered structure microporous layer in situ and a preparation method of a membrane electrode, and relates to the field of fuel cells. The fuel cell electrode comprises an electrode substrate layer, a hydrophobic layer, an ordered structure hydrophilic layer and a catalyst, wherein a hydrophobic layer is prepared on the electrode substrate layer, a hydrophilic layer with an ordered structure is prepared on the hydrophobic layer, and catalysts are uniformly distributed on the hydrophilic layer with the ordered structure.According to the invention, the platinum-based catalyst directly grows on the hydrophilic layer with the ordered structure in situ, so that the catalyst shows different morphologies such as nanoparticles, nanowires, nanorods and nano dendrites on the microporous layer, the electrochemical active surface area and catalytic activity are increased, the transmission resistance between the microporouslayer and the catalytic layer is reduced, and the performance of the battery can be effectively improved; in addition, the catalysts with special morphologies such as nanowires, nanorods, nano dendrites and the like have excellent stability, so that the durability of the battery is effectively improved.
Owner:JIANGSU UNIV
Fuel cell electrode in-situ preparation method based on microporous layer with double-layer ordered structure
ActiveCN112382767AImprove stabilityReduce transmission resistanceCell electrodesPtru catalystNanowire
The invention discloses a fuel cell electrode in-situ preparation method based on a microporous layer with a double-layer ordered structure, and relates to the field of fuel cells, and the method comprises the following steps: treatment of an electrode substrate layer, preparation of a hydrophobic layer, preparation of an ordered hydrophilic layer and in-situ growth of a platinum-based catalyst onthe hydrophilic layer. In the fuel cell electrode prepared by the method, the Pt-based catalyst directly grows on the ordered microporous layer in situ, so that the Pt-based catalyst shows differentforms such as nanowires and nano dendrites, the electrochemical active surface area and the catalyst stability are increased, the transmission resistance between the microporous layer and the catalystlayer is reduced, and the performance of the cell can be effectively improved. Under a low-temperature fuel cell operation condition, the electrode shows more excellent cell performance than a traditional electrode.
Owner:JIANGSU UNIV
Method for preparing graphene-loaded Fe1.5(PO4)OH hollow octahedron lithium ion battery positive electrode material
ActiveCN106848280AImprove electrochemical performanceImprove conductivityCell electrodesOctahedronFerrous salts
The invention discloses a method for preparing a graphene-loaded Fe1.5(PO4)OH hollow octahedron lithium ion battery positive electrode material. The method comprises the following steps: dissolving commercially available graphene oxide in deionized water; performing ultrasonic treatment to form turbid liquid A in which graphene oxide is uniformly dispersed; adding analytically pure soluble bivalent ferrous salts, urea and ammonium dihydrogen phosphate or diammonium hydrogen phosphate into a mixed solution of deionized water and ethylene glycol or glycerin, stirring and adding the mixture into the turbid liquid A to prepare a mixed solution B; carrying out microwave reaction on the mixed solution B so as to obtain a product C; and finally, performing centrifugal collection on the product C, washing, performing freeze drying, thereby obtaining the Fe1.5(PO4)OH hollow octahedron lithium ion battery positive electrode material in in-situ growth on the graphene surface. According to the method disclosed by the invention, the time is short, the reaction is fast, the yield is high, raw material price is low and the method is suitable for large-scale production.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing super capacitor electrode material made of nickel oxide nanosheet grown on micro carbon tube
InactiveCN104916451AImprove conductivityLarge specific surface areaHybrid capacitor electrodesHybrid/EDL manufactureCarbonizationMaterials science
A method for preparing a super capacitor electrode material made of a nickel oxide nanosheet grown on a micro carbon tube. The method comprises the following steps: cleaning collected willow catkins, putting the willow catkins in a carbonization furnace, and carbonizing the willow catkins under protective atmosphere to obtain a micro carbon tube; adding the micro carbon tube to N,N-dimethyl formamide, and carrying out ultrasonic processing to obtain a solution A; dissolving Ni(NO3)2.6H2O powder in deionized water to form a solution B, slowly adding the solution A to the solution B drop by drop for hydrothermal reaction, and cooling the mixed solution to room temperature; washing a product obtained in the previous step with deionized water, drying the product, and calcining the product under protective atmosphere to obtain a final product. The method of the invention has the advantages of simple process, mild preparation conditions, simple operation, low energy consumption, good rate performance, and good cycle performance.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
A lithium ion battery negative electrode material in which TiO2 nanoparticles are embedded in a CoS hollow shell and a preparation method thereof
ActiveCN109167022ALarge specific surface areaImprove electrochemical activityMaterial nanotechnologyCell electrodesVulcanizationSodium-ion battery
The invention discloses a lithium ion battery negative electrode material in which TiO2 nanoparticles are embedded in a CoS hollow shell, belonging to the technical field of lithium ion batteries. Thepreparation method of the invention is to synthesize TiO2 nanometer particles by the hydrolysis method of isopropyl titanate, Then a layer of MOF-affinity PVP was coated on the surface of TiO2 nanoparticles to make TiO2 nanoparticles absorbed in the growth process of ZIF67. The surface of TiO2 nanoparticles was mosaic and embedded in ZIF67 to form a kind of jujube cake structure. Finally, the final product was obtained by hydrothermal vulcanization with thioacetamide. The CoS hollow shell embedding TiO2 nanoparticles provided by the invention is used as the negative electrode material of thelithium ion battery, and the CoS hollow shell embedding TiO2 nanoparticles have good charge-discharge performance and cycle stability, and have important application value in the lithium ion battery.
Owner:CHINA JILIANG UNIV
Anode applied to direct hydroboron fuel battery and preparation method of anode
ActiveCN103840175AReduce the rate of hydrolysisReduce generationCell electrodesElectrochemical responseNickel
The invention relates to an anode applied to a direct hydroboron fuel battery and a preparation method of the anode. The anode consists of a catalyst layer and a diffusion layer which are mutually overlapped, wherein the diffusion layer is characterized in that a carbon material or foamed nickel is used as a substrate, and a leveling layer of which the surface is of a micro columnar structure is formed on the substrate; the catalyst layer is that an electrocatalyst for catalyzing a hydroboron to oxidize, and a mixture of a hydrogen evolution inhibitor and an adhesive are used as the raw materials for preparing the catalyst layer on the surface of the leveling layer. The anode prepared by adopting the method has the advantages that the electrochemical reaction area is expanded, the area of an interface between a gas diffusion layer and a catalytic active layer is increased, the active resistance and the ohmic resistance are reduced, the fuel utilization rate is increased, and the performance and the stability of the direct hydroboron fuel battery are improved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Fuel cell electrode with catalysts grown in situ on ordered structure microporous layer and method for preparing membrane electrode assembly
InactiveUS20220140354A1Reduce transmission resistanceReduce contact resistanceCell electrodesFuel cellsPtru catalystFuel cells
A fuel cell electrode with catalysts grown in situ on an ordered structure microporous layer and a method for preparing a membrane electrode assembly (MEA) are disclosed. The fuel cell electrode includes an electrode substrate layer, a hydrophobic layer, an ordered structure hydrophilic layer and catalysts. The hydrophobic layer is prepared on the electrode substrate layer. The ordered structure hydrophilic layer is prepared on the hydrophobic layer. The catalysts are uniformly distributed on the ordered structure hydrophilic layer.
Owner:JIANGSU UNIV
An alkaline water electrolysis full battery
ActiveCN111218693BImprove electrocatalytic activityImprove surface roughnessCellsOrganic diaphragmsElectrochemical responseElectrical battery
The invention relates to an electrode for an alkaline water electrolysis full battery and a preparation method thereof. The full battery includes a water electrolysis cell body, and the water electrolysis cell body is separated into a cathode cavity and an anode cavity which are not connected to each other by a diaphragm. The cavity and the anode cavity are respectively equipped with a cathode and an anode, and the diaphragm is a sulfonated polyether ketone ion exchange membrane; the anode is a hydrated cobalt-nickel sulfide nanosheet or a hydrated cobalt-nickel sulfide strip formed in situ on the surface of the nickel-based substrate bring. The electrode with this structure has the characteristics of high surface roughness and large electrochemical reaction area. The existence of two-dimensional nanosheets can not only promote electron transfer and material transport, but also provide more reactive sites for water electrolysis reactions. Thereby reducing the onset potential of OER and increasing the speed of water electrolysis reaction. Since the substrate Ni is relatively stable in an alkaline environment, the incorporation of Co elements makes the structure of nickel sulfide more stable, thereby maintaining its structure and catalytic performance during continuous water electrolysis.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Hollow fiber pore-forming agent and application thereof in fuel cells
ActiveCN112853530AReduce activation polarizationLower internal resistanceHollow filament manufactureCell electrodesElectrochemical responseFiber
The invention relates to a hollow fiber pore-forming agent and application thereof in fuel cells. The pore-forming agent is PAN-PVP coaxial hollow fiber prepared from peroxyacetyl nitrate and polyvinylpyrrolidone as raw materials, and a preparation method of the pore-forming agent comprises the following steps of preparing a PAN-PVP mixed solution from peroxyacetyl nitrate and polyvinylpyrrolidone; and then operating on a coaxial high-voltage electrostatic spinning machine, placing methyl silicone oil in an inner needle hole, placing the PAN-PVP mixed solution in an outer needle hole, and rotating a roller collector to collect the PAN-PVP coaxial hollow fiber. The PAN-PVP hollow fiber can form a three-dimensional network cross-linked cavity after a fuel cell anode is fired to remove the fiber, so that the connection of the anode in the hole is improved, the internal specific surface area of an electrolyte is increased, the activation polarization of the cell is integrally reduced, the electrochemical reaction area is increased, the internal resistance of the cell is reduced, and the substance diffusion is accelerated, and therefore, the output performance of the cell is finally improved, and attenuation of specific capacity is slowed down.
Owner:XIAMEN UNIV
A high-power annular energy storage battery
ActiveCN104701025BIncrease charging and discharging powerIncrease the electrochemical reaction areaHybrid capacitor electrolytesHybrid capacitor electrodesElectrochemical responseElectrical battery
A high-power ring-shaped energy storage battery, including several layers of ring-shaped walls made of solid electrolyte coaxially set together, the two ends of the ring-shaped wall are respectively fixed on the insulating circular base and the circular upper cover, all the ring-shaped walls Together with the circular base and the circular upper cover, several layers of airtight chambers are enclosed together. The adjacent airtight chambers are filled with positive electrode materials or negative electrode materials at intervals. When the battery is running, the positive and negative electrode materials are both in liquid state; The bottom of the body draws out the positive and negative current lead-out poles respectively and gathers them to form the positive and negative poles of the battery. The battery provided by the invention has a large electrochemical reaction area and a current flow area, has excellent electronic conductivity, can reach a sufficiently large current density, and ensures a sufficiently high charge and discharge rate and power, and has a simple structure and low cost. It is cheap, can determine size parameters according to different capacity requirements, is easy to expand in scale, and can meet different capacity and space requirements.
Owner:XI AN JIAOTONG UNIV
Three-dimensional porous lithium manganate thin film electrode, preparation method and application thereof
The invention discloses a three-dimensional porous lithium manganate film electrode, a preparing method of the three-dimensional porous lithium manganate film electrode and the application of the three-dimensional porous lithium manganate film electrode as the positive pole of a lithium ion battery. The preparing method includes the steps that a high-molecular polymer porous film with a hydrophilic surface is obtained through pretreatment; the chemical bath deposition method is used for depositing manganese oxide to the surface of the high-molecular polymer porous film with the hydrophilic surface so as to obtain a precursor film containing manganese; the precursor film containing manganese is soaked into a solution containing lithium, and the mixed solution reacts in the protective atmosphere for 0.5-8 h at the temperature of 250 DEG C-400 DEG C and then reacts in the air atmosphere for 1-10 h at the temperature of 500 DEG C-900 DEG C to obtain the three-dimensional porous lithium manganate film electrode finally. The three-dimensional porous lithium manganate film electrode is an overall electrode, does not need addition of an adhesion agent or a conductive agent, has excellent rate performance and cycling stability and can be widely applied to the fields of high-performance lithium ion batteries and the like as the positive pole of the lithium ion battery.
Owner:宜兴市欣驰能源科技有限公司
A kind of lead-carbon battery for motorcycle and preparation method thereof
ActiveCN104835965BGood for high rate dischargeImprove charge acceptanceLead-acid accumulator electrodesFiberGraphite
Owner:QINGYUAN KAIJIE POWER SUPPLY CO LTD
An electrolytic cell for electrochemical reduction of carbon dioxide and its application
ActiveCN105316700BImprove conversion rateIncrease concentrationCellsElectrolytic organic productionElectrochemical responseVapor–liquid separator
The invention discloses an electrolytic cell for electrochemical reduction of carbon dioxide and its application, comprising a cathode chamber, an anode chamber and a gas-liquid separator; It is a container with an open lower end, the upper cavity is placed above the lower cavity, and a first flange is provided at the opening ends of the two cavities, and the two cavities are connected through the first flange; it is different from the traditional H Compared with the type electrolytic cell, it can significantly improve the conversion rate of carbon dioxide, increase the electrochemical reaction speed, and at the same time, it is easy to operate and convenient to calculate.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Electric vehicle battery plate
ActiveCN104835940BImprove the effect of current collectionGood high current discharge performanceLead-acid accumulator electrodesElectrochemical responseElectric-vehicle battery
A high-performance electric vehicle battery electrode plate includes a positive plate and a negative plate. The size of the positive plate is 66.5 mm in width, 143 mm in height and 2.06 mm in thickness, the [alpha] value of the positive plate is 1:13 and the MS value of the positive plate is 3.5 g / cm<2>, thereby increasing the electrochemical reaction area and further improving high-current discharge performance of the battery. The size of the negative plate is 66.5 mm in width, 144 mm in height and 1.42 mm in thickness, the [alpha] value of the positive plate is 1:11 and the MS value of the positive plate is 2.3 g / cm<2>, thereby increasing the electrochemical reaction area and further improving high-current discharge performance of the battery. According to the invention, during design of the polar plates, by means of accurate design of the [alpha] value and the MS value and improvement of shape structure and design with combination of the shape and structure of the battery, the electrochemical reaction area of the plates can be increased, and further the high-current discharge performance of the battery is enhanced and circulating service life of the battery is prolonged.
Owner:ANHUI ZHONGNENG POWER SUPPLY CO LTD
A method for in-situ preparation of fuel cell electrodes based on a double-layer ordered microporous layer
ActiveCN112382767BImprove stabilityReduce transmission resistanceCell electrodesPtru catalystNanowire
The invention discloses an in-situ preparation method of a fuel cell electrode based on a double-layer ordered microporous layer, and relates to the field of fuel cells. The method includes treating the electrode base layer, preparing a hydrophobic layer, preparing an ordered hydrophilic layer, and preparing In situ growth of platinum-based catalysts on the hydrophilic layer. In the fuel cell electrode prepared by the present invention, the Pt-based catalyst is directly grown in situ on the ordered microporous layer, so that the Pt-based catalyst exhibits different forms such as nanowires and nanodendrites, which increases the electrochemically active surface area and catalyst stability. It reduces the transmission resistance between the microporous layer and the catalytic layer, and can effectively improve the performance of the battery. Under low-temperature fuel cell operating conditions, the electrode exhibits better battery performance than conventional electrodes.
Owner:JIANGSU UNIV
High-capacity positive lead paste and preparation method thereof
PendingCN113644270AImprove bindingSlow down the PCL-1 phenomenonElectrode manufacturing processesLead-acid accumulatorsPolyesterFiber
The invention belongs to the technical field of lead storage batteries, and discloses a high-capacity positive lead paste. The high-capacity positive lead paste is prepared from, by mass, lead powder, sulfuric acid, deionized water, antimony trioxide, bismuth trioxide, zinc oxide, polyester staple fibers, high-structure carbon black and red lead. By adding the additives such as the high-structure carbon black, the pore volume and pore diameter of the positive active material are improved, and migration of sulfate radicals and hydrogen ions is improved, so that the utilization rate of the active material is improved, more capacity can be released under the same discharge current density, and the cycle life of the battery is prolonged.
Owner:HENAN CHAOWEI POWER SUPPLY
Bifunctional electrode for alkaline water electrolysis, and preparation method and application thereof
ActiveCN113005468AImprove electrocatalytic activityMany surface active sitesEnergy inputElectrodesPtru catalystConductive materials
The invention provides a bifunctional electrode for an alkaline water electrolysis total battery, and a preparation method and application thereof. The electrode not only can catalyze a cathode hydrogen evolution reaction of alkaline water electrolysis, but also can catalyze an oxygen evolution reaction of an anode of alkaline water electrolysis. In the difunctional electrode, two elements S and O exist at the same time, sulfide can promote rapid occurrence of HER, and oxide can promote occurrence of OER. According to the bifunctional electrode, the fiber surface of a porous conductive material is uniformly coated with a catalyst to form a three-dimensional electrode, so that the reaction area in the thickness direction of the electrode is expanded, electron transfer and substance transmission can be promoted, more reaction active sites can be provided for water electrolysis reaction, the initial potential of OER is reduced, and, the speed of water electrolysis reaction is also increased.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
a co 2 Preparation method of electrode catalyst for electrochemical reduction
ActiveCN113061931BStable structureHigh selectivityElectrolytic organic productionElectrode shape/formsPtru catalystFaraday efficiency
The present invention provides a CO 2 A method for preparing an electrode catalyst for electrochemical reduction, in a soluble strongly acidic mixed solution containing soluble Cu salt and a second alloy element, at room temperature and in an inert atmosphere, using a thin sheet-shaped conductive material as a substrate, using a rapid current deposition process Precipitated hydrogen bubbles are used as templates to obtain. Catalysts prepared by this method are sensitive to CO 2 The electrochemical reduction has excellent electrocatalytic activity and structural stability. The faradaic efficiency of CO is greater than 90%, and the optimum is 98%. The continuous and stable operation exceeds 30h, and the decrease in faradaic efficiency of effective products is less than 5%.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A titanium-based pore-forming agent and its application in fuel cells
ActiveCN112853540BEffective control diameterEffective control lengthCell electrodesConjugated synthetic polymer artificial filamentsElectrochemical responseElectrical battery
The invention relates to a titanium-based pore-forming agent and its application in fuel cells. The pore-forming agent is prepared by using butyl titanate or tetrabutyl titanate, polyacrylonitrile and polyvinylpyrrolidone as raw materials TiO 2 ‑PAN‑PVP coaxial composite fiber, which is prepared by preparing butyl titanate or tetrabutyl titanate into TiO 2 Sol, polyacrylonitrile and polyvinylpyrrolidone are prepared as PAN-PVP mixed solution, and then operated on a coaxial high-voltage electrospinning machine, the inner pinhole is placed with PAN-PVP mixed solution, and the outer pinhole is placed with TiO 2 Sol, rotating drum collector to collect TiO 2 ‑PAN‑PVP coaxial composite fiber, in the process of preparing the anode, after removing the fiber by high pressure heating, TiO 2 Remains in the channel, which helps to improve the connection of the anode inside the hole; TiO 2 It is nano-particles with a large specific surface area, which can increase the electrochemical reaction area; reduce the activation polarization of the battery as a whole, reduce the internal resistance of the battery, and accelerate the diffusion of substances, thereby ultimately improving the output performance of the battery and slowing down the attenuation of the specific capacity.
Owner:XIAMEN UNIV
a co 2 Electrode for electrochemical reduction and its preparation and application
ActiveCN110938846BImprove surface roughnessIncrease the electrochemical reaction areaElectrolytic organic productionElectrodesHydrogenation reactionSide reaction
The present invention relates to a CO 2 Electrode for electrochemical reduction and its preparation and application. The electrode is made by soaking the base material in the electroplating solution containing the main salt and additives after removing impurities, and performing electrochemical deposition under the protection of an inert atmosphere and stirring conditions to obtain surface growth. Electrodes with micron Cu particles; the proportion of side atoms of Cu particles deposited on the surface of the prepared electrode substrate is much higher than that of corner atoms, which is conducive to improving the coverage of CO* on the electrode surface, and providing support for the subsequent CO* dimerization reaction and The hydrogenation reaction provides a favorable environment, which has the effect of significantly inhibiting the side reaction of hydrogen evolution, and at the same time has a high C 2 h 4 selective.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Lithium-ion battery negative electrode material and preparation method thereof
ActiveCN107768650BEasy reunionLarge specific surface areaMaterial nanotechnologySecondary cellsNanoparticleTio2 nanoparticles
The invention discloses a TiO2 hollow mesoporous spherical shell coating TiO2 nanoparticle lithium ion battery cathode material and a preparation method thereof, and belongs to the technical field oflithium ion batteries. The preparation method of the lithium ion battery cathode material comprises the steps of coating a layer of SiO2 on the surfaces of TiO2 nanoparticles P25 through a classic stober method, then coating the surface of the SiO2 with a layer of TiO2 through an isopropyl titanate hydrolyzing method and removing the SiO2 layer to obtain the TiO2 hollow mesoporous spherical shellcoating TiO2 nanopartile material. When the TiO2 hollow mesoporous spherical shell coating TiO2 nanoparticle disclosed by the invention is used as the lithium ion battery cathode material, the TiO2 hollow mesoporous spherical shell coating TiO2 nanoparticle shows a good charge-discharge property and cycling stability. The preparation method disclosed by the invention has the advantages of simple synthesizing technology, moderate reaction condition, lower cost and suitability for large-scale synthesis.
Owner:CHINA JILIANG UNIV
A three-dimensional limn 2 o 4 Preparation method of thin-film positive electrode and three-dimensional all-solid-state thin-film lithium-ion battery
ActiveCN106207099BLarge specific surface areaImproved magnification performanceFinal product manufactureVacuum evaporation coatingSolid state electrolyteLithium-ion battery
Owner:THE NORTHERN RES INST OF NJUST
High-power annular energy storage battery
ActiveCN104701025AIncrease charging and discharging powerIncrease the electrochemical reaction areaHybrid capacitor electrolytesHybrid capacitor electrodesElectrochemical responseChemical reaction
The invention discloses a high-power annular energy storage battery. The high-power annular energy storage battery comprises several layers of annular walls which are coaxially sleeved together and made of solid electrolyte, the ends of the annular walls are fixed on an insulating round pedestal while the other ends are fixed on a round upper cover, all the annular walls, round pedestal and round upper cover jointly form several layers of closed cavities sleeved together, anode material and cathode material alternatively fill the spaces between adjacent closed cavities at intervals, and when the battery runs, both the anode material and cathode material are in the liquid state; anode current and cathode current are led from the bottoms of the closed cavities and respectively gathered to form an anode and a cathode of the battery. The high-power annular energy storage battery has large electro-chemical reaction area and current flow area and good electronic conductivity; the high-power annular energy storage battery is capable of providing a large enough current density to guarantee a high enough charging / discharging speed rate and power, and moreover, the high-power annular energy storage battery is simple in structure, low in cost, capable of confirming size parameters according to different capacity requirements, easy to expand scale and capable of meeting different capacity and space requirements.
Owner:XI AN JIAOTONG UNIV
Preparation method and application of ZnMn2O4 tube-in-tube nanofibers
InactiveCN113373550AIncrease evaporation rateIncrease the annealing rateMaterial nanotechnologyMicroscopic fiber electrodesFiberSpinning
The invention relates to the technical field of battery catalysts, in particular to a preparation method of ZnMn2O4 tube-in-tube nanofibers. The preparation method comprises the following steps that (1), zinc salt and manganese salt are dissolved in ethanol or a mixed solvent of DMF and ethanol, then PVP is added into the obtained metal salt solution, and a spinning solution is obtained after the PVP is completely dissolved; (2), the spinning solution is prepared into the fiber membrane by using a single-nozzle electrostatic spinning method; (3), the fiber membrane is dried, heated and pretreated to obtain the pretreated fiber membrane; and (4), annealing treatment is carried out on the pretreated fiber membrane to obtain the ZnMn2O4 tube-in-tube nanofibers. The ZnMn2O4 tube-in-tube nanofibers are prepared by regulating and controlling the volatilization rate of the solvent in the spinning solution and the subsequent heat treatment process, and has the advantages that the specific surface area is relatively large, and the tube-in-tube structure can effectively relieve the problem of volume expansion of the material in the charge-discharge cycle process, so that the lithium storage performance of the material is improved.
Owner:UNIV OF JINAN
A preparation method of graphene-loaded iron hydroxyphosphate hollow octahedral lithium-ion battery positive electrode material
The invention discloses a method for preparing a graphene-loaded Fe1.5(PO4)OH hollow octahedron lithium ion battery positive electrode material. The method comprises the following steps: dissolving commercially available graphene oxide in deionized water; performing ultrasonic treatment to form turbid liquid A in which graphene oxide is uniformly dispersed; adding analytically pure soluble bivalent ferrous salts, urea and ammonium dihydrogen phosphate or diammonium hydrogen phosphate into a mixed solution of deionized water and ethylene glycol or glycerin, stirring and adding the mixture into the turbid liquid A to prepare a mixed solution B; carrying out microwave reaction on the mixed solution B so as to obtain a product C; and finally, performing centrifugal collection on the product C, washing, performing freeze drying, thereby obtaining the Fe1.5(PO4)OH hollow octahedron lithium ion battery positive electrode material in in-situ growth on the graphene surface. According to the method disclosed by the invention, the time is short, the reaction is fast, the yield is high, raw material price is low and the method is suitable for large-scale production.
Owner:SHAANXI UNIV OF SCI & TECH
A hollow fiber pore-forming agent and its application in fuel cells
ActiveCN112853530BReduce activation polarizationLower internal resistanceCell electrodesHollow filament manufactureElectrochemical responseElectrical battery
The invention relates to a hollow fiber pore-forming agent and its application in fuel cells. The pore-forming agent is PAN-PVP coaxial hollow fiber, and its preparation method is to combine polyacrylonitrile, polyvinylpyrrolidone Prepare a PAN-PVP mixed solution, and then operate it on a coaxial high-voltage electrospinning machine, place methyl silicone oil in the inner pinhole, place a PAN-PVP mixed solution in the outer pinhole, and rotate the drum collector to collect the PAN-PVP coaxial hollow fiber. The PAN-PVP hollow fiber of the present invention can form a three-dimensional network cross-linked cavity after the anode of the fuel cell is fired to remove the fiber, which helps to improve the connection of the anode inside the hole, increases the internal specific surface area of the electrolyte, and reduces the battery overall. Activate the polarization, increase the electrochemical reaction area, reduce the internal resistance of the battery, and accelerate the diffusion of substances, thereby ultimately improving the output performance of the battery and slowing down the decline in specific capacity.
Owner:XIAMEN UNIV
A kind of anode for direct borohydride fuel cell and preparation method thereof
ActiveCN103840175BLower activation resistanceIncrease the electrochemical reaction areaCell electrodesElectrochemical responseAdhesive
The invention relates to an anode applied to a direct hydroboron fuel battery and a preparation method of the anode. The anode consists of a catalyst layer and a diffusion layer which are mutually overlapped, wherein the diffusion layer is characterized in that a carbon material or foamed nickel is used as a substrate, and a leveling layer of which the surface is of a micro columnar structure is formed on the substrate; the catalyst layer is that an electrocatalyst for catalyzing a hydroboron to oxidize, and a mixture of a hydrogen evolution inhibitor and an adhesive are used as the raw materials for preparing the catalyst layer on the surface of the leveling layer. The anode prepared by adopting the method has the advantages that the electrochemical reaction area is expanded, the area of an interface between a gas diffusion layer and a catalytic active layer is increased, the active resistance and the ohmic resistance are reduced, the fuel utilization rate is increased, and the performance and the stability of the direct hydroboron fuel battery are improved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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