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40results about How to "Improve ion conduction" patented technology
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Alkali fuel cell unaffected by carbonation
InactiveUS20070128500A1Improve performanceImprove ion conductionElectrolyte holding meansFuel cells groupingCarbonationIon
An alkali fuel cell comprises a solid stack consisting of a first electrode, a solid membrane conducting hydroxide ions and a second electrode, each electrode comprising an active layer that is in contact with the solid membrane. The material forming the active layer of each electrode comprises at least a catalytic element, an electronic conductive element and an element conducting hydroxide ions. The element conducting hydroxide ions is a polymer having vinylaromatic units comprising a quaternary ammonium function and a hydroxide ion OH− is associated with each quaternary ammonium function. One such alkali fuel cell is unaffected by carbonation and maintains good electrochemical performances.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
All-solid-state lithium ion battery and fabrication method thereof
ActiveCN106159314AEasy to assembleReduce manufacturing costFinal product manufactureElectrode collector coatingAll solid statePowder method
The invention relates to a lithium ion battery and a fabrication method thereof, in particular to an all-solid-state lithium ion battery and a fabrication method thereof. The all-solid-state lithium ion battery comprises a positive current collector, a positive active material layer, a negative current collector, a negative active material layer and a solid electrolyte, wherein the positive active material layer is fabricated on the positive current collector by a powder method, and the negative active material layer is fabricated on the negative current collector by a thin film method. By the fabrication method, the all-solid-state lithium ion battery which has excellent integral performance, is low in production cost and is suitable for large-scale industrial production can be obtained.
Owner:MICROVAST POWER SYST CO LTD
Polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and preparation method thereof
The invention belongs to the field of polymer anion exchange membranes and preparation thereof, and particularly relates to polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and a preparation method thereof. The preparation method comprises the following steps: firstly, performing bromination and Suzuki coupling on 4,4'-difluorodiphenyl sulfone to prepare an active difluorosulfone monomer containing an octamethoxy structure; then, performing copolycondensation on the monomer, 4,4'-difluorodiphenyl sulfone and biphenol to prepare polyarylether sulfone containing a polymethoxy structure, further utilizing a demethylation reaction to convert the prepared polyether sulphone containing the polymethoxy structure into a polymer containing a hydroxylstructure, and finally utilizing a Williamson reaction to react the polymer containing the hydroxyl structure with (5-bromopentyl)trimethylammonium bromide to obtain the polyethersulfone containing multiple flexible side chain quaternary ammonium salt structures. The polyarylethersulfone has excellent film-forming property, and the prepared polymer film has high alkali-resistant stability, ionicconductivity and dimensional stability, and has important potential application value in application of alkaline fuel cells.
Owner:CHANGZHOU UNIV
Ionic conductive solid electrolyte, method of manufacturing the same and electrochemical system using the same
InactiveUS7101638B2Low costEasy to manufactureNon-metal conductorsSolid electrolyte cellsMolybdateTungstate
An object of the present invention is to provide a low cost and highly ionic conductive solid electrolyte which is an organic-inorganic composite compound and is water-absorbing as well as water-resistive. Another object of the present invention is to provide electrochemical systems utilizing the above-mentioned electrolyte. The solid electrolyte of the present invention is a composite compound comprising tungstic and / or molybdic acid compound and polyvinylalcohol (PVA), and containing water. Tungstate and / or molybdate and other salt are neutralized by an acid in the aqueous solution dissolving PVA. Then, the water as the solvent of the aqueous solution is removed, and then the unnecessary salts are removed, thereby obtaining the composite compound.
Owner:NIPPON KODOSHI
Method for improving specific capacitance of electric double-layer capacitor
ActiveCN106935415AHigh specific capacitanceLower internal resistanceHybrid capacitor separatorsHybrid capacitor electrolytesCapacitanceState of art
The invention relates to a method for improving specific capacitance of an electric double-layer capacitor, belongs to the technical field of a capacitor and solves the problems that since liquid absorption rate of a capacitor diaphragm for electrolyte is low, equivalent internal resistance of the electric double-layer capacitor is large, ionic conductance is low and specific capacitance is low in the prior art. The method comprises the following steps: to begin with, peeling an eggshell membrane from an eggshell, cleaning and cutting the eggshell membrane to a required size; then, preparing an egg white base gel electrolyte solution formed by egg white, water and neutral salt; placing the cut eggshell membrane into the egg white base gel electrolyte solution for more than 10 mins; wiping unnecessary electrolyte solution on the surface of the eggshell membrane to obtain an egg white base gel electrolyte; and assembling the egg white gel electrolyte into an electric double-layer capacitor. The method is simple and environment friendly; and by utilizing affinity between the egg white and the eggshell membrane as well as gel property of the egg white in increasing viscosity of the electrolyte, the eggshell membrane is allowed to absorb larger amount of electrolyte solution, so that internal resistance of the capacitor is reduced, ionic conduction is improved, and specific capacitance of the capacitor is improved.
Owner:王馨瑜
Method for preparing carbon quantum dot modified lithium-sulfur battery positive electrode materials
ActiveCN109494346AIncrease capacityHigh magnificationElectrode carriers/collectorsElectrode collector coatingHigh current densityBattery charge
The invention provides a method for preparing carbon quantum dot modified lithium-sulfur battery positive electrode materials, and belongs to the field of preparation of lithium-sulfur battery positive electrode materials. The method has the advantages that carbon quantum dots with functionalized polyethyleneimine surfaces are used for preparing lithium-sulfur battery positive electrodes, shuttling effects in battery charge and discharge procedures can be inhibited under polysulfide adsorption effects of polyethyleneimine, and accordingly the long cycle performance of lithium-sulfur batteriescan be guaranteed; the method for preparing the carbon quantum dot modified lithium-sulfur battery positive electrode materials includes simple and convenient processes, the capacity, the rates and the cycle performance of the lithium-sulfur batteries under working conditions of high load and high current density can be obviously improved, and accordingly the method has a potential application value in the field of lithium-sulfur batteries.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Silicon or silicon oxide@titanium oxide core-shell structure composite material and preparation thereof
ActiveCN109920995AHigh purityGood dispersionCell electrodesSecondary cellsReaction temperatureSilicon oxide
The invention discloses a silicon or silicon oxide@titanium oxide core-shell structure composite material, and belongs to the technical field of lithium ion battery negative electrode materials. The composite material is a core-shell double-layer structure, the inner layer contains silicon or silicon oxide(SiOx), and the outer layer contains titanium oxide and densely and evenly wraps the inner layer. The invention also discloses a preparation method of the composite material. The preparation method includes the following steps of: adding powder containing silicon or silicon oxide and a surfactant into a reactor, mixing with a dispersion solution, adding a precursor solution into the mixture, heating to a coating reaction temperature for coating reaction, and obtaining an intermediate product; and roasting the intermediate product under the protection of an inert atmosphere to obtain the composite material. The composite material has the characteristics of easy dispersibility, high Sicontent, significantly-improved conductivity, high specific capacity and good cycle stability. The preparation method is simple in process, has no pollution, is low in cost and short in procedure, andis easy to realize batch production.
Owner:TSINGHUA UNIV
Ternary positive electrode material@titanium nitride core-shell-structured composite material and preparation method thereof
ActiveCN113097459AHigh purityGood dispersionCell electrodesSecondary cellsInternal resistanceTitanium nitride
The invention discloses a ternary positive electrode material@titanium nitride core-shell-structured composite material, belonging to the technical field of positive electrode materials of lithium ion batteries. The composite material is of a compact double-layer structure, wherein the inner layer is a nickel-cobalt-aluminum or nickel-cobalt-aluminum ternary positive electrode material, and the outer layer is a high-crystallinity titanium oxide TiN; on the basis that the total weight of the composite material is 100%, the mass fraction of the inner layer is 30-95%, and the mass fraction of the outer layer is 5-70%; and the outer layer is TiN with high crystallinity, the crystallinity of the outer layer is not lower than 90%, and the purity of the outer layer is not lower than 99.5%. In addition, the invention also discloses a preparation method of the composite material. Compared with an original ternary positive electrode material which is not subjected to coating treatment, the composite material of the invention has the characteristics of remarkably improved conductivity, relatively high specific capacity, good cycling stability, improved rate capability and reduced internal resistance. The preparation method is simple in process, free of pollution, low in cost, short in flow and easy for industrial amplification.
Owner:TSINGHUA UNIV
Single-phase perovskite-based solid electrolyte, solid oxide fuel cell comprising same, and method for manufacturing same
InactiveUS20180198150A1Less impuritiesImprove ion conductionCell electrodesFinal product manufactureStrontium carbonateFuel cells
This invention relates to a single-phase perovskite-based solid electrolyte, a solid oxide fuel cell including the same, and a method of manufacturing the same. The method of the invention includes stirring and pulverizing a mixed oxide including lanthanum oxide (La2O3), strontium carbonate (SrCO3), gallium oxide (Ga2O3) and magnesium oxide (MgO); and obtaining an LSGM powder by subjecting the pulverized mixed oxide to primary calcination at a first temperature and then secondary calcination at a second temperature that is higher than the first temperature.
Owner:KOREA INST OF IND TECH
Lithium-sulfur battery positive copolymer sulfur material and prepared lithium-sulfur battery made from material
ActiveCN109546149AEasy to operateSimple processCell electrodesLi-accumulatorsTriple bondCarbon nitrogen
The invention provides a lithium-sulfur battery positive copolymer sulfur material. The lithium-sulfur battery positive copolymer sulfur material is prepared through steps as follows, (1), sublimed sulfur powder and organic polymerization agent are collected to obtain uniform mixture through grinding, and the organic polymerization agent is nitrile organic substance; (2), the uniform mixture of the sublimed sulfur and the organic polymerization agent is sealed in a container under the high temperature condition and is insulated and stirred; and (3), the copolymerized sulfur obtained in the step (2) is pulverized to obtain positive electrode copolymerized sulfur particles. The invention further provides a lithium-sulfur battery made from the lithium-sulfur battery positive copolymer sulfurmaterial. The lithium-sulfur battery positive copolymer sulfur material is advantaged in that preparation requirements can be met through simple heating equipment, and the preparation process has characteristics of convenient operation and simple process. The preparation method is advantaged in that chemical bonding between the organic matter and the sulfur is produced through bond opening reaction of nitrile compounds'unique carbon-nitrogen triple bond and the 8-membered ring structure of the sublimated sulfur at the high temperature, and the polymeric sulfur copolymer can be formed.
Owner:BEIHANG UNIV
Electrode and preparation method thereof
PendingCN113097442ALow tortuosityFast ion conductionFinal product manufactureElectrode carriers/collectorsPhysicsComposite material
The invention relates to the technical field of lithium ion batteries, in particular to an electrode and a preparation method thereof. The electrode comprises a current collector, a plurality of through hole layers and a plurality of active layers, the through hole layers and the active layers are arranged on the current collector, and the through hole layers are arranged between the current collector and the active layers or between any adjacent active layers. The electrode is composed of a plurality of active layers and through hole layers, each through hole layer is composed of a net structure of a high polymer, the high polymer is dissolved in electrolyte when the electrode is used, namely a pore structure with controllable pore size and distribution is formed, so that each active layer can be in contact with more electrolyte, and the problems that electrolyte infiltration of a thick electrode is difficult and ion transmission is slow are solved. Besides, the morphology of the through hole layer is controllable, compared with a traditional porous electrode, the tortuosity of pores is lower, ion conduction is faster, the ion conductivity of the pole piece is improved, and then the energy, the power density and the rate capability of a battery cell are guaranteed.
Owner:RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
Pressure-sensitive adhesive compositions, pressure-sensitive adhesive layers, and pressure-sensitive adhesive sheets
InactiveUS20130034728A1Reduce stainsModerate adhesionSemi-permeable membranesSynthetic resin layered productsAntistatic agentPressure sensitive
The present invention provides a pressure-sensitive adhesive composition which is excellent in removability, peel adhesive power temporal stability and staining properties; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet. The present invention also provides a pressure-sensitive adhesive composition which can prevent electrification of a non-antistatic protected adherend when peeled off using an ionic compound which is an antistatic agent, and is less likely to cause lifting and is also excellent in removability; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet.
Owner:NITTO DENKO CORP
Silicon nickel alloy-graphene electrode material and preparation method and application thereof
InactiveCN109616631AImprove cycle stabilityImprove conductivitySecondary cellsNegative electrodesNickel alloyGraphene electrode
The invention discloses a silicon nickel alloy-graphene electrode material and preparation method and application thereof. The electrode material is a silicon nickel alloy-graphene material, wherein graphene is in full contact with silicon nickel alloy, and silicon particle wraps an intermediate phase of the silicon nickel alloy. The preparation method comprises the steps of taking silicon powderand nickel powder as raw materials, and preparing silicon nickel alloy by a plasma discharging sintering (SPS) mode; and pulverizing the silicon nickel powder, performing ball-milling and combinationwith graphene powder to obtain the silicon nickel alloy-graphene electrode material. The invention also provides application of the silicon nickel alloy-graphene electrode material in preparation of alithium ion battery negative electrode. The silicon nickel alloy-graphene electrode material has the advantages of high reversible capacity, good cycle stability and the like, and mass production canbe achieved.
Owner:SOUTHEAST UNIV
Negative electrode material, electrochemical device, and electronic device
ActiveCN113517442AImproved magnification performancePromote expansionSecondary cellsNegative electrodesChemical physicsSilicon oxygen
The invention relates to a negative electrode material, an electrochemical device and an electronic device. The negative electrode material comprises a silicon-based compound; in an X-ray diffraction pattern of the negative electrode material, the peak intensity of 2 theta at 22.0-24.0 degrees is I1, the peak intensity of 2 theta at 44.0-46.0 degrees is I2, and the I2 a I1 meets the relational expression I2 / I1 > 1. According to the negative electrode material disclosed by the invention, SiOx bulk phase doping is carried out by using a doping element, the doping element and silicon form a chemical bond, the bond length between silicon and oxygen is increased, and the energy barrier of the silicon-oxygen material in lithium intercalation is reduced, so that the electron and ion conduction of the silicon-oxygen material is improved, and the rate capability of the material and the expansion in the cycle process are remarkably improved.
Owner:NINGDE AMPEREX TECH
Electrolyte for solid electrolyte-containing lithium secondary battery and application thereof
ActiveCN111211356AImprove performanceImprove ion conductionSecondary cellsOrganic electrolytesElectrolytic agentOrganic solvent
The invention discloses an electrolyte for a solid electrolyte-containing lithium secondary battery and application of the electrolyte. The electrolyte comprises a lithium salt and a non-aqueous organic solvent; the non-aqueous organic solvent is an ether compound and / or a non-ether organic matter with polarity smaller than that of diethyl ether; and the non-aqueous organic solvent does not dissolve a solid electrolyte and does not react with the solid electrolyte. The electrolyte provided by the invention can be used as an electrolyte of the lithium secondary battery, can also be used as an additive of a solid-state battery, and can achieve the effects of improving ion conduction and reducing interface impedance, thereby effectively improving the performance of the solid-state battery.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD
Preparation method of solid electrolyte, solid electrolyte, preparation method of total battery and total battery
InactiveCN111755742AEffective shuttleImprove ion conductionSecondary cellsElectrolyte immobilisation/gelificationSolid state electrolyteAlkaline earth metal
The invention provides a preparation method of a solid electrolyte, the solid electrolyte, a preparation method of a total battery and the total battery. The preparation method of the solid electrolyte comprises the steps of: S1, preparing M-X type porous zeolite powder, wherein M represents alkali metal or alkaline-earth metal; S2, mixing and grinding the M-X type porous zeolite powder and corresponding ionic liquid of M metal, and drying to obtain M-X type porous zeolite electrolyte powder; and S3, pressing the M-X type porous zeolite electrolyte powder into a solid electrolyte. According tothe solid electrolyte disclosed by the invention, the ionic liquid can be adsorbed in the micropores by utilizing the porous framework, meanwhile, due to the fact that cation bonds in a zeolite framework are weak, effective shuttling of metal cations can be achieved, a dual ion transmission path of ionic liquid and a zeolite framework is constructed, ion conduction of the material is improved, and therefore formation and growth of dendrites are inhibited.
Owner:HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
All Solid-State Lithium-Ion Battery Incorporating Electrolyte-Infiltrated Composite Electrodes
ActiveUS20220216505A1Improve ionic conductivityImprove electrochemical stabilitySolid electrolytesCell electrodesSolid state electrolyteComposite electrode
Electrolyte-infiltrated composite electrode includes an electrolyte component consisting of a polymer matrix with ceramic nanoparticles embedded in the matrix to form a networking structure of electrolyte. Suitable ceramic nanoparticles have the basic formula Li7La3Zr2O12 (LLZO) and its derivatives such as AlxLi7-xLa3Zr2-y-zTayNbzO12 where x ranges from 0 to 0.85, y ranges from 0 to 0.50 and z ranges from 0 to 0.75, wherein at least one of x, y and z is not equal to 0. The networking structure of the electrolyte establishes an effective lithium-ion transport pathway in the electrode and strengthens the contact between electrode layer and solid-state electrolyte resulting in higher lithium-ion electrochemical cell's cycling stability and longer battery life. Sold-state electrolytes incorporating the ceramic particles demonstrate improved performance. Large dimensional electrolyte-infiltrated composite electrode sheets can be used in all solid-state lithium electrochemical pouch cells which can be assembled into battery packs.
Owner:SOLID ENERGIES INC
Preparation and application of non-woven multifunctional diaphragm
InactiveCN112259381AHigh resistivityStrong polar adsorption capacityHybrid capacitor separatorsLi-accumulatorsPolyvinyl alcoholPhenyl Ethers
The invention discloses preparation and application of a non-woven multifunctional diaphragm. The preparation method comprises the following steps: (1) mixing deionized water and a formamide solutionwith a certain proportion with a commercial vanadium pentoxide drug, carrying out a hydrothermal reaction in a reaction kettle under certain conditions, and carrying out suction filtration and dryingto obtain a vanadium pentoxide nanosheet; (2) mixing the vanadium pentoxide nanosheet with a certain concentration with polyvinyl butyral ester, polyethylene glycol octylphenyl ether and dibutyl phthalate in absolute ethyl alcohol, drying to form a diaphragm, and testing the water absorption rate of the diaphragm; and (3) assembling the vanadium pentoxide nanosheet diaphragm with a certain concentration and two pieces of commercial carbon cloth with the same size into an energy storage device, exploring the optimal concentration of the vanadium pentoxide nanosheet of the diaphragm, and calculating the ionic conductivity of the vanadium pentoxide nanosheet. According to the invention, the diaphragm which is low in cost, high in ionic conductivity, stable in electrochemical performance and adjustable in adsorbability is prepared through the method which is simple and rapid to operate, and a new thought is provided for research and development of diaphragms of energy storage devices.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Method for performing sulfur-doped phosphorus modification on carbon surface and application thereof
PendingCN114583137ASimple processAvoid process problemsElectrode thermal treatmentNegative electrodesFast chargingElectro conductivity
The invention belongs to the technical field of battery materials, and discloses a method for performing sulfur-doped phosphorus modification on a carbon surface and application of the method, the method comprises the following steps: mixing a phosphorus source and a sulfur source, and then performing heat treatment on the mixed phosphorus-sulfur mixed material and a raw material with a carbon-based surface at 300-600 DEG C to obtain a product, the introduction of sulfur can improve the deposition efficiency, uniformity and environmental stability of the phosphorus element on the carbon-based surface in the heat treatment process, and the correspondingly obtained material has a sulfur-doped phosphorus interface layer. According to the method disclosed by the invention, the high-performance battery negative electrode material with the sulfur-doped phosphorus interface layer can be particularly obtained, the high-performance battery negative electrode material is used as an alkali metal ion battery, and the sulfur-doped phosphorus interface layer has good environmental stability, so that the material can be used for manufacturing a battery electrode by using a water-based binder; and phosphides generated in the circulation process can improve the ionic conductivity of the material, so that the fast charging performance of the battery is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Methods of Improving the Specific Capacitance of Electric Double Layer Capacitors
ActiveCN106935415BHigh specific capacitanceLower internal resistanceHybrid capacitor separatorsHybrid capacitor electrolytesCapacitanceEggshell
The invention relates to a method for improving specific capacitance of an electric double-layer capacitor, belongs to the technical field of a capacitor and solves the problems that since liquid absorption rate of a capacitor diaphragm for electrolyte is low, equivalent internal resistance of the electric double-layer capacitor is large, ionic conductance is low and specific capacitance is low in the prior art. The method comprises the following steps: to begin with, peeling an eggshell membrane from an eggshell, cleaning and cutting the eggshell membrane to a required size; then, preparing an egg white base gel electrolyte solution formed by egg white, water and neutral salt; placing the cut eggshell membrane into the egg white base gel electrolyte solution for more than 10 mins; wiping unnecessary electrolyte solution on the surface of the eggshell membrane to obtain an egg white base gel electrolyte; and assembling the egg white gel electrolyte into an electric double-layer capacitor. The method is simple and environment friendly; and by utilizing affinity between the egg white and the eggshell membrane as well as gel property of the egg white in increasing viscosity of the electrolyte, the eggshell membrane is allowed to absorb larger amount of electrolyte solution, so that internal resistance of the capacitor is reduced, ionic conduction is improved, and specific capacitance of the capacitor is improved.
Owner:王馨瑜
A kind of preparation method of carbon quantum dot modified lithium-sulfur battery cathode material
ActiveCN109494346BEnhanced chemical adsorption capacityInhibition of the shuttle effectElectrode carriers/collectorsElectrode collector coatingElectrical batteryLithium sulfur
The invention provides a method for preparing a positive electrode material of a lithium-sulfur battery modified by carbon quantum dots, and belongs to the field of preparation of the positive electrode material of a lithium-sulfur battery. The present invention uses polyethyleneimine surface-functionalized carbon quantum dots for the preparation of lithium-sulfur battery cathodes, utilizes the adsorption of polyethyleneimine on polysulfide compounds, suppresses the shuttle effect during battery charging and discharging, and ensures lithium-sulfur The long-term cycle performance of the battery. The preparation method of the positive electrode material of the carbon quantum dot modified lithium-sulfur battery disclosed in the present invention has the characteristics of simple and convenient process, and can significantly improve the capacity, rate and cycle performance of the lithium-sulfur battery under the working conditions of high load and high current density. The field of sulfur batteries has potential application value.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
All Solid-State Lithium-Ion Battery Produced by Pressure-Aided Co-Curing
ActiveUS20220359906A1Improve cycle stabilityGood compatibilitySolid electrolytesFinal product manufactureChemical physicsComposite electrode
In solid-state lithium-ion battery cells, electrolyte-infiltrated composite electrode includes an electrolyte component consisting of polymer matrix with ceramic nanoparticles embedded in the matrix to form networking structure of electrolyte. The networking structure establishes effective lithium-ion transport pathway in the electrode. Electrolyte-infiltrated composite electrode sheets and solid electrolyte membranes can be used in all solid-state lithium electrochemical pouch and coin cells. Solid-state lithium-ion battery is fabricated by: (a) providing an anode layer; (b) providing a cathode layer; (c) positioning a ceramic-polymer composite electrolyte membrane between the anode layer and the cathode layer to form a laminar battery assembly; (d) applying pressure to the laminar battery assembly; and (e) heating the laminar battery assembly. Pressure-aided co-curing strengthens the contacts between the electrodes and the solid electrolyte membrane thus creating stable electrode-membrane interfaces with fewer porous regions. Lithium electrochemical cells and batteries exhibit excellent rate performance and outstanding stability over wide temperature range.
Owner:SOLID ENERGIES INC
A nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application
ActiveCN109346732BORR electrocatalytic performance promotion and regulationIncrease the areaCell electrodesPtru catalystFuel cells
The invention relates to a nitrogen-doped porous carbon catalyst prepared from potatoes and preparation and application of the catalyst. A preparation method of the catalyst comprises the following steps: 1) pretreating potatoes so as to obtain a potato paste; 2) carrying out high-temperature carbonization on the potato paste so as to obtain a nitrogen-doped carbon material; 3) mixing the nitrogen-doped carbon material with an activator, and carrying out high-temperature calcining activation so as to obtain an activation product; 4) removing excessive activator, thereby obtaining the nitrogen-doped porous carbon catalyst. The catalyst can be used as a fuel battery cathode catalyst for catalyzing oxygen reduction reactions. Compared with the prior art, the preparation method provided by theinvention is simple to operate, low in cost and convenient in large-scale industrial production; the prepared catalyst is of a multi-stage pore structure, has a high specific surface area and porosity, has an adjustable nitrogen element content and excellent ORR (Oxygen Reduction Reaction) electro-catalytic properties.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A preparation method of a high-rate silicon oxide-based lithium battery negative electrode material
ActiveCN109286012BImprove reaction kineticsExcellent step ratio performanceNegative electrodesSecondary cellsElectrical conductorNew energy
The invention belongs to the field of new energy materials and electrochemistry, and particularly relates to a preparation method of a high-rate monox-based lithium electric anode material. Accordingto the method, a sol-gel method and a carbon thermal reduction method are adopted to prepare a monox-carbon / graphene material with electrochemical activity, then dispersed fast ion conductor lithiumsilicate is prepared on the surface of the monox-carbon material through spin wrapping and thermal treatment, and finally the monox-carbon@lithium silicate / graphene material is obtained. The fast ionconductor lithium silicate can effectively accelerate the ion transport during charging and discharging of a composite material and accelerate the reaction kinetics of an electrode. The in-situ introduction of the flexible graphene during preparation can effectively buffer the volume change caused by the lithium deintercalation of monox in a cyclic process and improve the structural stability ofthe electrode. The preparation method of the high-rate monox-based lithium electric anode material has the advantages that the designed material has higher rate characteristics and good cycle stability; the preparation process has higher controllability and can be applied to the preparation of other high-performance electrode materials.
Owner:UNIV OF SCI & TECH BEIJING
Preparation method and application of conductive adhesive based on reinforced polysulfide ion adsorption
InactiveCN110707325AInhibit shuttleAchieve deliveryCell electrodesSecondary cellsPorous carbonAdhesive
The invention relates to a lithium-sulfur battery technology, and aims to provide a preparation method of a conductive adhesive based on reinforced polysulfide ion adsorption. The preparation method comprises the following steps: adding beta-cyclodextrin dissolved by deionized water into an aniline solution, and performing ultrasonic dispersion and vacuum drying to obtain an aniline cyclodextrin inclusion compound; preparing a solution from the aniline cyclodextrin inclusion compound and deionized water; dropwise adding hydrogen peroxide, and carrying out ultrasonic dispersion to polymerize aniline in the adjacent aniline cyclodextrin inclusion compound; and drying in vacuum to obtain the conductive adhesive. Compared with a traditional binder, the product has excellent electrical conductivity, the electrode impedance can be greatly reduced, and the used binder is environmentally friendly and green. The obtained modified porous carbon has the characteristics of large specific surface area and large pore volume, can carry more sulfur, has very strong polysulfide adsorption capacity, is favorable for inhibiting shuttling of polysulfide ions due to iron oxide dispersed on the inner wall of the carbon, is suitable for preparing a high-performance sulfur electrode material, and prolongs the service life of a sulfur battery.
Owner:ZHEJIANG UNIV
Adhesive composition for foldable display, adhesive film using same, and foldable display comprising same
ActiveCN111295430BImprove ion conductionHigh dielectric constantNon-macromolecular adhesive additivesEster polymer adhesivesPolymer scienceDisplay device
Owner:LG CHEM LTD
A kind of electrolyte solution for lithium secondary battery containing solid electrolyte and application thereof
ActiveCN111211356BImprove performanceImprove ion conductionSecondary cellsOrganic electrolytesInterface impedanceInterfacial impedance
The invention discloses a lithium secondary battery electrolyte solution containing a solid electrolyte and an application thereof. The lithium secondary battery electrolyte solution includes a lithium salt and a non-aqueous organic solvent, and the non-aqueous organic solvent is an ether compound and / or A non-ether organic substance with a polarity less than ether, the non-aqueous organic solvent does not dissolve the solid electrolyte and does not react with the solid electrolyte. The electrolyte solution for lithium secondary batteries containing solid electrolyte provided by the present invention can be used as the electrolyte solution of lithium secondary batteries, and can also be used as an additive for solid-state batteries, which can improve ion conduction and reduce interface impedance. Thereby effectively improving the performance of solid-state batteries.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD
A lithium-sulfur battery cathode copolymerized sulfur material and a lithium-sulfur battery made of it
ActiveCN109546149BSimple processEasy to operateCell electrodesLi-accumulatorsElectrical batteryLithium–sulfur battery
Owner:BEIHANG UNIV
Lithium salt, ionic conductor and liquid electrolyte
InactiveUS7125631B2Improve featuresHigh ion conductivityNon-metal conductorsLithium organic compoundsLithiumElectrical conductor
Disclosed are a lithium salt expressed by a formula, LiAlXn(OY)4-n, where “X” is an electrophilic substituent group and “Y” is an oligoether group, an ionic conductor with the lithium salt dispersed in a structural member, and a liquid electrolyte with the lithium salt dissolved in a solvent. For example, the ionic conductor exhibits high ionic conductivity as well as high lithium ion transport number.
Owner:TOYOTA JIDOSHA KK +1
Solid electrode and preparation method and application thereof
PendingCN114335525AMinimize the various problems caused byReduce interface impedanceElectrode carriers/collectorsSecondary cellsSolid state electrolyteIn situ polymerization
The invention discloses a solid electrode and a preparation method and application thereof. The solid electrode comprises active material particles, a conductive additive, a polyion liquid-based solid electrolyte and a current collector, and the conductive additive and the polyion liquid-based solid electrolyte are uniformly and compactly coated on the surfaces of the active material particles. The polyion liquid-based solid electrolyte is a copolymer electrolyte obtained by carrying out in-situ polymerization reaction on an ionic liquid monomer with at least one reactive active group and a polymer monomer with at least one reactive active group. The solid electrode does not contain an ionic liquid plasticizer, various problems caused by the plasticizer are greatly reduced, the solid electrode structure is beneficial to reducing interface impedance among active particles in the solid electrode, ionic conduction among the particles is improved, and the solid electrode has a good application prospect. And the all-solid-state battery containing the solid electrode can obtain higher specific capacity, lower internal resistance and better rate capability at 25 DEG C.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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