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82results about How to "Improve the electrochemical reaction rate" patented technology
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Nano silicon/porous carbon composite anode material of lithium ion batteries as well as preparation method and application of composite anode material
The invention discloses a nano silicon / porous carbon composite anode material of lithium ion batteries as well as a preparation method and an application of the composite anode material. The composite anode material is a core-shell structure material consisting of a porous nano silicon particle core and a porous carbon layer shell. The preparation method of the composite anode material comprises the steps as follows: carbonization treatment is performed after an organic polymer layer is coated on the surface of aluminum-silicon alloy powder, aluminum is removed by performing acid etching on a carbonization product, pore forming is performed on a carbon layer, and thus the nano silicon / porous carbon composite anode material is obtained. The preparation method is simple and low in cost, the mass production requirement is met, and the prepared composite anode material can be used for preparing the lithium ion battery and shows high capacity and excellent cycle and rate performance.
Owner:CENT SOUTH UNIV
Method for preparing anti-hardening granular burning-free iron-carbon microelectrolysis filler
ActiveCN103880122ARealize resource utilizationRealize waste treatmentSolid waste disposalWater/sewage treatmentWastewaterSewage treatment
The invention relates to a method for preparing anti-hardening granular burning-free iron-carbon microelectrolysis filler. The method comprises the following steps of: using scrap iron, charcoal, coal ash, cement, quick lime and clay as materials, mixing the materials respectively according to the mass fraction of 32-26%, 8-10%, 32-35%, 9-12%, 5-7% and 5-7%, granulating and curing to obtain the anti-hardening granular burning-free iron-carbon microelectrolysis filler. The particle diameter of the prepared anti-hardening granular burning-free iron-carbon microelectrolysis filler is 5-7mm. The method has the advantages that when a product is used for sewage treatment, the CODCr and the chromaticity of waste water can be reduced in shorter time, the toxicity of the waste water can be reduced and the biodegradability can be improved; in the use process, the hardening is not easy to occur, the maintenance cost is low and the usage period is long; in the preparation process, waste resources are fully utilized and a burning-free process is adopted, so that the purposes of saving energy, reducing emission and treating wastes with wastes are achieved.
Owner:SHANDONG UNIV
Negative electrode material with multiple coating structures as well as preparation method and application of negative electrode material
ActiveCN110993949ALower pHImprove ionic conductivitySecondary cellsNon-aqueous electrolyte accumulator electrodesCarbon coatingElectrolytic agent
The invention relates to a negative electrode material with a multi-coating structure as well as a preparation method and application of the negative electrode material. The negative electrode material with the multiple coating structures comprises lithium-containing silicon monoxide as well as a lithium salt coating layer, a carbon coating layer and a polymer coating layer which sequentially coatthe surface of the silicon monoxide. The lithium salt coating layer of the negative electrode material effectively inhibits the volume expansion of the material, improves the ionic conductivity of the surface of the material, improves the cycling stability of an electrode, and reduces the alkalinity of the material; the carbon coating layer of the negative electrode material improves the electronic conductivity of the surface of the material and improves the oxidation-reduction reaction rate of the surface of the material; the polymer coating layer of the negative electrode material improvesthe compatibility between the silicon monoxide and the organic electrolyte, limits the volume expansion of the material to a certain extent, avoids the cracking of the material, and more effectively improves the cycling stability of the electrode.
Owner:JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
Device and method for processing semiconductor material through backward multifocal lasers and electrochemistry in combined manner
InactiveCN106735866APromotes electrochemical reactionsIncrease potential differenceOther manufacturing equipments/toolsLaser beam welding apparatusElectrochemical responseCorrosion
The invention provides a device and method for processing a semiconductor material through backward multifocal lasers and electrochemistry in a combined manner. The energy, frequency and wavelength of the lasers are regulated, and a multifocal laser beam acts on the back face of a semiconductor sample; on one hand, when the lasers radiate the back face of the semiconductor sample, a large amount of light can be stimulated in the semiconductor sample to generate holes, the holes move to the position of the surface of the polished semiconductor sample to participate in the electrochemistry reaction, and material corrosion removal is achieved; and on the other hand, on the back face of the semiconductor sample, the multifocal lasers gradually conduct processing inwards. A work electrode is a cathode, the semiconductor sample is used as an anode, and when the potential between the two electrodes is high, spark discharge processing is conducted; and when the potential is low, electrochemistry erosion removal is conducted. The multifocal lasers and electrochemistry act on the semiconductor sample in the combined manner, the corrosion efficiency is improved, and the surface quality of through holes is improved. When the high-precision micro-through-holes are processed in the semiconductor material, the combination effect is good in action effect, and the device and the method are suitable for precise processing.
Owner:JIANGSU UNIV
Pyritoides additive used in anode of lithium-sulfur battery
ActiveCN105206841AImprove the electrochemical reaction rateIncrease capacity and stabilityCell electrodesSecondary cellsMetallicityLithium–sulfur battery
The invention discloses a pyritoides additive used in the anode of a lithium-sulfur battery. The pyritoides additive is doped in an anode material framework through mechanical grinding or liquid-phase filtration, or anchored onto the anode material framework under the chemical action. The pyritoides additive comprises disulphide of VIII-group metal, diselenide of VIII-group metal, ditelluride of VIII-group metal, FexCo1-xS2 and CoyNi1-yS2, wherein 0<x<1, and 0<y<1. By means of the surface polarity and half-metallicity of pyritoides substances, the redox reaction rate of polysulfide intermediate products is increased in the anode of the lithium-sulfur battery, and then the capacity and stability of the anode are improved.
Owner:TSINGHUA UNIV
Preparation method of block NiS2 and application of block NiS2 to sodium-ion battery
InactiveCN105883940AIncrease contact areaLower electrode potentialMaterial nanotechnologyCell electrodesNickel saltAlcohol
The invention discloses a preparation method of block NiS2 and an application of the block NiS2 to a sodium-ion battery. According to the method, a 2-methylimidazole alcohol solution is added to a nickel salt alcohol solution, the mixture is evenly mixed, left to stand, subjected to centrifugal separation and dried, and nickel precursors are obtained; the nickel precursors and sulfur powder are ground and mixed, the mixture is placed in a vacuum environment for heat treatment, and a block NiS2 material comprising high-purity NiS2 nano spherical small particles is obtained. The material is used as an anode material to be applied to the sodium-ion battery and shows excellent electrochemical properties such as the high specific capacity, the long cycle life and the like; the preparation method of the block NiS2 material is simple, the cost is low, and industrial production requirements are met.
Owner:CENT SOUTH UNIV
Treatment method for improving electrochemical performance of B-site doped perovskite catalyst
InactiveCN109888315AFast transferOffset potential differenceFuel and secondary cellsCell electrodesAlkaline earth metalRare earth
The invention discloses a treatment method for improving electrochemical performance of a composite catalyst. Illumination is applied to a B-site doped perovskite catalyst, the molecular formula of the B-site doped perovskite catalyst is AB1-yB'yO3, wherein A is selected from rare earth metal or alkaline earth metal, B is selected from transition metal or alkaline earth metal, B' represents a doping element and is the transition metal, A, B and B' are not equal to each other, and y is greater than 0 and is less than 1. The experiment shows that after an illumination condition is applied to theB-site doped perovskite catalyst doped with the transition element at the B site, when the concentration of photo-generated carriers in a perovskite material is large enough, a potential difference of a space charge layer can be greatly counteracted by the light voltage, so that band bending completely disappears, namely the space charge layer disappears. Namely the disappearance of the space charge layer is accelerated through the addition of the light, and the electrocatalytic reaction proceeds quickly; and the treatment method disclosed by the invention has a better application prospect inthe field of electrochemistry.
Owner:SHENZHEN INST OF ADVANCED TECH
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
Owner:JIANGSU UNIV
Fuel cell bipolar plate with controllable pressure difference between flow channels
ActiveCN110854405AImprove the electrochemical reaction rateSmall pressure lossCollectors/separatorsEngineeringProton exchange membrane fuel cell
The invention belongs to the technical field of proton exchange membrane fuel cell flow channel design, and relates to a fuel cell bipolar plate with a controllable pressure difference between flow channels. The fuel cell bipolar plate includes a square gas flow field and a plurality of parallel square ribs arranged in parallel in the gas flow field. Holes for fixing the bipolar plate are locatedat the corners of the flow field. The gas inlet of an internal flow channel is disposed on a side of the bipolar plate. The gas outlet of the internal flow channel is disposed on the opposite side ofthe gas inlet of the internal flow channel. The gas inlet of an outer flow channel is disposed on the adjacent side of the gas inlet of the inner flow channel. The gas outlet of the outer flow channeldisposed on the opposite side of the gas inlet of the outer flow channel. The fuel cell bipolar plate promotes the drainage of a proton exchange membrane fuel cell electrode through a dual-channel combination in coopeation with different air pressures to improve a material transfer rate. The squeezing effect of different air pressures promotes the discharge of liquid water under the ribs of the membrane electrode to the flow channels and out of the cell with a gas to reduce water flooding, so that the membrane electrode has good conductivity and porosity.
Owner:JIANGSU UNIV
Refrigerator
PendingCN112747525AImprove the electrochemical reaction rateSimple structureLighting and heating apparatusDomestic refrigeratorsElectrochemical responseElectrolysis
The invention provides a refrigerator, which comprises an inner container, and a storage compartment is formed inside; a storage container arranged in the storage compartment; a first oxygen removal assembly arranged on the storage container and provided with a first oxygen consumption part which faces the interior of the storage container and is used for consuming oxygen in the storage container through an electrochemical reaction, and a first electrolysis part which faces the exterior of the storage container and is used for electrolyzing water vapor outside the storage container; and a water supplementing device arranged close to the storage container and used for providing the water vapor required by the electrochemical reaction for the first electrolysis part. The water supplementing device is arranged on the rear side of the first oxygen removal assembly, so that the water supplementing device provides the water vapor required by the electrochemical reaction for the first electrolysis part, the electrochemical reaction rate of the first oxygen removal assembly can be increased, and the oxygen removal rate is increased; and the water supplementing device is arranged in the storage compartment, the structure is simple, and operation is easy.
Owner:QINGDAO HAIER REFRIGERATOR CO LTD +1
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
CoO/rGO composite and preparation method and use thereof
ActiveCN108539160AAid in diffusionFacilitate penetrationCell electrodesLithium–air batteryNanoparticle
The invention discloses a CoO / rGO composite and a preparation method and application thereof, the CoO / rGO composite is formed by randomly distributing CoO nanorods in the shape of sugar coated haws ona stick on the surface of graphene, the CoO nanorods are composed of CoO nanoparticles, and a gap is arranged between adjacent CoO nanoparticles. The CoO / rGO composite is a double-effect catalyst fora lithium air battery. The CoO / rGO composite has good catalytic activity for both ORR and OER, and has very high battery capacity. The CoO / rGO composite has simple process, environmental friendliness, low cost and high efficiency and other characteristics.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Electrochemical method for accelerating dissolution of soluble bridge plug
ActiveCN110847852AFast dissolutionImprove work efficiencySealing/packingCorrosion preventionElectrochemistry
The invention provides an electrochemical method for accelerating dissolution of a soluble bridge plug. The electrochemical method comprises the specific steps that 1, as for the situation that the inner wall of a casing is subjected to internal corrosion prevention, 5-8 m<3> of hydrochloric acid or sulfuric acid with the mass percent being 10-15% is injected at the displacement of 1-2 m<3> / min firstly, then 5-8 m<3> of guanidine gum base liquid is introduced for isolation, and replacing is conducted with clear water to the bridge plug position; as for the situation that the inner wall of thecasing is not subjected to internal corrosion prevention, a saturated strong electrolyte solution is injected at the displacement of 1-2 m<3> / min firstly, then a gas and heat production agent A, guanidine gum base liquid and a gas and heat production agent B are pumped sequentially, and replacing is conducted with clear water to the bridge plug position. Through the method of electrochemistry (a primary battery and an electrolytic cell), the potential difference of various metals is utilized, by giving a certain current to the casing, a soluble ball and the soluble bridge plug are rapidly dissolved, the diameter of a wellbore is recovered in time, and the electrochemical method is of great practical significance for rapid production or rapid fracturing construction of the next section.
Owner:PETROCHINA CO LTD
Method for preparing lithium ion battery cathode material
InactiveCN105552354AEasy to operateUnique structureCell electrodesSecondary cellsElectrochemical responseEtching
The invention discloses a method for preparing a lithium ion battery cathode material. The cathode material is a composite microsphere of a special yolk structure, the nuclear layer of the composite microsphere is Fe3O4, the shell layer of the composite microsphere is a C-N layer containing mesoporous, and a cavity formed after etching is located between the nuclear layer and the shell layer. The preparing method comprises the steps of firstly, synthesizing SiO2 nano particles with the sol-gel method, and synthesizing Fe3O4 nano particles with the hydrothermal method; then coating Fe3O4 with a layer of SiO2, and coating the SiO2 layer with a composite shell composed of SiO2 nano particles and melamine resin; finally, obtaining the composite microsphere of the special yolk structure through calcination and etching. The material is novel in structure, the volume effect of the Fe3O4 particles can be inhibited by the cavity, the lithium ion diffusion velocity can be increased through the mesoporous so that the electrochemical reaction rate can be increased, and multiplying power and cycle performance can also be improved while the conductivity and specific capacity of the material are improved.
Owner:QILU UNIV OF TECH
Clustered polyaniline nanofiber composite carbon electrode and preparation method and application thereof
ActiveCN106920971AEasy to prepareGood for mass manufacturingMaterial nanotechnologyCell electrodesElectrochemical responseAniline
The invention provides a clustered polyaniline nanofiber composite carbon electrode and preparation method and application thereof. The preparation method comprises the following steps of firstly, dissolving tartaric acid in water to obtain a tartaric acid aqueous solution, adding aniline to the tartaric acid aqueous solution to obtain a mixed liquid A, and performing ice-bath cooling; secondly, dropwise adding an ammonium persulfate aqueous solution into the mixed liquid A to obtain a mixed liquid B, and performing ice-bath heat preservation; thirdly, placing a carbon fabric in the mixed liquid B, and allowing ice-bath standing; and finally, taking out the carbon fabric, washing the carbon fabric with deionized water and an organic solvent to obtain the clustered polyaniline nanofiber composite carbon electrode. In the polyaniline product prepared according to the method, a regular clustered nanometer structure is formed on a surface of the carbon fabric in an in-situ way, and the material has better biological compatibility and larger specific area; the size and the shape of the electrode can be adjusted, and the electrode is applicable to different demands of a laboratory, a factory, a precise instrument and the like; and with a microstructure electrode formed from the electrode, the electrode has higher roughness and more excellent absorption performance, and the electrochemical reaction ratio is greatly improved.
Owner:JIANGSU UNIV
Nano-scale cube cobalt stannate and graphene composite material and preparation method and application thereof
InactiveCN107799748AThe process is simple and controllableReduce manufacturing costMaterial nanotechnologyCell electrodesGraphene coatingSodium-ion battery
The invention discloses a nano-scale cube CoSnO<3> and graphene composite material. The composite material is characterized in that nano-scale cube CoSnO<3> and gauzy graphene form a coating structure. The nano-scale cube CoSnO<3> and graphene composite material is prepared by a simple and easy method, wherein the nano-scale cube CoSnO<3> is uniformly coated with graphene, and by virtue of graphene coating, the conductivity of the CoSnO<3> material is greatly improved; meanwhile, volume expansion of the CoSnO<3> material is also relieved, and pulverization and falling off of the electrode material are also suppressed effectively; and therefore, when the nano-scale cube CoSnO<3> and graphene composite material prepared in the invention is used as the negative electrode material of a sodiumion battery, excellent discharge specific capacity and stable cycle performance are represented.
Owner:TIANJIN NORMAL UNIVERSITY
Preparation method of Super P/CoO self-assembled porous nano rodlike composite negative electrode material for lithium-ion battery
ActiveCN105958060AImprove conductivityImprove structural stabilityCell electrodesSecondary cellsElectrochemical responseReaction rate
The invention provides a preparation method of a Super P / CoO self-assembled porous nano rodlike composite negative electrode material for a lithium-ion battery. Conductive carbon black Super P with excellent conductivity is utilized as a carbon material compounded with CoO, so that the preparation process is relatively simple; and improvement of the conductivity and the structure stability of the CoO negative electrode material is achieved more efficiently. The self-assembled porous nano rodlike CoO / Super P composite is obtained through combination of a hydrothermal method and thermal treatment; the lithium ion intercalation / deintercalation distances is greatly reduced by nanoscale CoO particles and the one-dimensional rodlike structure; the electrochemical reaction rate is improved; the specific surface area of the material is increased by the porous structure; active sites of electrochemical reaction and the contact area of the electrode material and an electrolyte are increased; and quick and effective electrochemical reaction is facilitated. Due to these structural characteristics, the lithium storage capacity of the CoO / Super P composite is increased; the rate capability is improved; and the preparation method has important significance for research and development of the negative electrode material for the lithium-ion battery.
Owner:SHAANXI UNIV OF SCI & TECH
Non-enzymatic biosensor based on metal-modified porous boron-doped diamond electrode and preparation method and application of non-enzymatic biosensor
ActiveCN111579612AImprove stabilityHigh detection sensitivityElectrolytic coatingsVacuum evaporation coatingSputteringElectrochemical biosensor
The invention discloses a non-enzymatic biosensor based on a metal-modified porous boron-doped diamond electrode and a preparation method and application of the non-enzymatic biosensor. A working electrode of the non-enzymatic biosensor is a metal modified porous boron-doped diamond electrode, and the metal modified porous boron-doped diamond electrode comprises a silicon wafer substrate and an electrode working layer. The electrode working layer is arranged on the surface of the silicon wafer substrate, the electrode working layer is a porous boron-doped diamond layer, the surface of the porous boron-doped diamond layer is modified with metal nanoparticles, and the pore surface of the porous boron-doped diamond layer contains an sp2 phase. According to the invention, chemical vapor deposition and magnetron sputtering are combined, the preparation of the multi-metal modified porous boron-doped diamond composite material electrode is realized by the tubular atmosphere annealing furnaceand the electrochemical workstation, and the electrode has the characteristics of high sensitivity and stability and high resolution, and can be widely applied to the fields of construction of electrochemical biosensors, heavy metal detection and the like.
Owner:CENT SOUTH UNIV
Composite positive electrode material and preparation method thereof, lithium battery positive electrode material and lithium battery
PendingCN112259724ALower internal resistanceSlow down the growth rate of internal resistancePositive electrodesLi-accumulatorsInternal resistanceGraphite
The invention provides a composite positive electrode material and a preparation method thereof, a lithium battery positive electrode material and a lithium battery. The composite positive electrode material comprises graphene, a ternary positive electrode material and a coupling agent. The ternary positive electrode material is uniformly coated by using a stacked structure obtained by bonding thegraphene and the ternary positive electrode material with the coupling agent, so that the gap between the graphene and the ternary positive electrode material is greatly reduced, the diffusion and conduction path of lithium ions on the graphene is shortened, and the internal resistance of the ternary positive electrode material is reduced. Meanwhile, by utilizing a fast ion conduction channel contained in the coupling agent and the electrolyte isolation effect of graphene, the diffusion obstruction of graphene to lithium ions is further reduced, the rate capability and the cycle performance of the lithium battery are improved, and the composite positive electrode material is simple in component, wide in source and relatively low in cost.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Silicon anode of lithium ion battery
InactiveCN106531970AGood flexibilityGood chemical stabilityCell electrodesSecondary cellsCyclic processSilicon dioxide
The invention discloses a silicon anode of a lithium ion battery. The silicon anode is formed by bonding a conductive agent and an anode material, the anode material comprises anode active matter and a binding material, the anode active matter comprises graphite and silicon dioxide, and the binding material is an organic solvent type binding agent. A conductive agent is of a silicon nanotube ball structure and comprises a plurality of evenly distributed silicon nanotubes, and the anode material is attached to the surfaces of the silicon nanotubes. A carbon material has high electronic conductivity and ionic conductivity, the rate capacity of the silicon material can be improved, and the volume effect of silicone in the circulating process can be inhibited. The silicon anode has high battery capacity and circulating stability.
Owner:SUZHOU GREEN POWER TECH CO LTD
Sulfur nanoparticles, preparation thereof, and preparation of lithium sulfur battery positive electrode by sulfur nanoparticles
ActiveCN107572486AUniform particle size distributionGood dispersionMaterial nanotechnologyCell electrodesLithium–sulfur batteryNanoparticle
The invention relates to sulfur nanoparticles, preparation thereof, and preparation of a lithium sulfur battery positive electrode by the sulfur nanoparticles, and belongs to the fields of inorganic nanometer materials and electrochemistry. The sulfur nanoparticles are prepared by taking a gelatin aqueous solution as a dispersing agent and a protective agent and by decomposing sodium thiosulfate.The prepared sulfur nanoparticles are uniform in particle size and high in dispersibility. The prepared sulfur nanoparticles are applied to preparation of the lithium sulfur battery positive electrode. Electrochemical performance test proves that the prepared sulfur nanoparticles show excellent electrochemical performance. The method is simple and easy to operate, the used raw materials are low incost, environmental friendliness is achieved, and popularization is facilitated.
Owner:BEIJING UNIV OF CHEM TECH
Three-dimensional current collector/Zn/Zn-E composite negative electrode, preparation thereof and application of composite negative electrode in aqueous zinc ion battery
PendingCN114883560AIncrease profitHigh densityElectrode manufacturing processesElectrode carriers/collectorsBattery cellAnalytical chemistry
The invention belongs to the technical field of aqueous zinc ion batteries, and particularly discloses a three-dimensional current collector / Zn / Zn-E composite negative electrode which comprises a three-dimensional current collector substrate, a zinc body layer deposited on the surface of the three-dimensional current collector substrate and a Zn-E alloy layer deposited on the zinc surface. In addition, the invention also discloses a preparation method of the negative electrode and an application method of the negative electrode in an aqueous zinc ion battery. The composite zinc negative electrode has high utilization rate, the energy density of the battery is greatly improved, and the assembled aqueous zinc ion total battery has excellent cycle and rate performance. In addition, the preparation method is simple, efficient and low in cost, and further application of the water-based zinc ion battery is promoted.
Owner:CENT SOUTH UNIV +1
Mesoporous silicon/cobalt disilicide composite microsphere material as well as preparation method and application thereof
ActiveCN109987607ASolve reunionShorten the transmission distanceMaterial nanotechnologyCell electrodesHigh rateMicrosphere
The invention discloses a mesoporous silicon / cobalt disilicide composite microsphere material as well as a preparation method and application thereof. The method comprises the following steps: sequentially adding ammonia water and an ethyl orthosilicate ethanol solution into a cobalt nitrate ethanol solution under stirring to prepare a precursor, performing reduction on the obtained precursor by adopting a magnesiothermic process, and finally washing the reduced product by using hydrochloric acid. When the mesoporous silicon / cobalt disilicide composite microspheres provided by the invention are used for preparing a negative electrode material of a lithium ion battery, the cobalt disilicide component and the mesoporous structure of the composite microspheres facilitate suppressing materialpowdering and improving electrode reaction kinetics, so that the actual capacity, cycle performance and high rate performance of the material are effectively improved.
Owner:TAIZHOU UNIV
Integrated preparation process for long-life hydrogen storage alloy film/nickel foil combined electrode material
InactiveCN110380011ALarge specific surface areaEvenly dispersedVacuum evaporation coatingSputtering coatingElectrochemical responseRare-earth element
The invention relates to an integrated preparation process for a long-life hydrogen storage alloy film / nickel foil combined electrode material. The process is characterized by comprising steps that a,rare earth elements and other metal elements are smelted under argon protection conditions to obtain cast ingot, and the cast ingot is then made into alloy powder under the protection of argon; b, the alloy powder is pressed into an alloy target for sputtering; c, a nickel foil substrate for sputtering is cut and cleaned; d, the working pressure, the sputtering power, the sputtering time and thesubstrate temperature for sputtering are set, and the hydrogen storage alloy film is prepared. Through the prepared combined electrode material, the diffusion distance of electrons / ions is effectivelyreduced, the specific surface area of the alloy is increased, the contact resistance between an active material and a current collector is reduced, integrated preparation of the long-life hydrogen storage alloy film / nickel foil composite electrode material is realized, and a new method and idea is provided for reducing the internal resistance of a nickel-hydrogen battery and increasing the electrochemical reaction rate.
Owner:JILIN UNIV
High-temperature stability nickel cobalt lithium manganate composite electrode as well as preparation method and application thereof
InactiveCN107768627AIncrease compaction densityReduce volumeCell electrodesSecondary cellsTernary complexComposite electrode
The invention discloses a high-temperature stability nickel cobalt lithium manganate composite electrode as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: mixing lithium acetate, nickel sulfate, cobalt sulfate and manganese sulfate according to a molar ratio of 1:0.47:0.2:0.33 to obtain a mixture, adding 20-30weight parts of the mixture into 100 weight parts of water, and dissolving to obtain an aqueous phase; adding ammonia gas into an oil phase, stabilizing the oil-water phase by an emulsifier, preparinga precursor by an inverse emulsion method, and pre-sintering to obtain a ternary complex; coating the ternary complex by aluminum hydroxide, calcining at the temperature of 980-1050 DEG C under inertgas shielding for 4-8 hours, finally furnace cooling, thereby obtaining the composite electrode material. According to the method disclosed by the invention, the problems that the conventional nickelcobalt lithium manganate electrode material is poor in high stability and the compaction density is not high enough are solved.
Owner:长沙仲善新能源科技有限公司
Preparation method of rare-earth-doped lithium titanate ultrathin nanosheet negative electrode material
InactiveCN109449433AEvenly distributedImprove the electrochemical reaction rateMaterial nanotechnologySecondary cellsRare-earth elementChemistry
The invention discloses a preparation method of a rare-earth-doped lithium titanate ultrathin nanosheet negative electrode material. The method comprises the steps of 1) mixing, dispersing and stirring 0.008-0.012 mol of LiOH.H2O, 2-4 ml of tetrabutyl titanate and 0.04-0.1 mmol of MCl3.7H2O to obtain turbid liquid, wherein M is one of La and Ce; 2) carrying out a hydrothermal reaction on the turbid liquid, and then carrying out suction filtration and washing so as to obtain a modified lithium titanate negative electrode material precursor; 3) carrying out vacuum drying, and then carrying out grinding to form powder; and 4) carrying out heat treatment on the ground powder to obtain the rare earth element M-doped lithium titanate nanosheet negative electrode material Li4Ti5-xMxO12. The method disclosed by the invention is simple in process, free of pre-sintering and gas protection, and easy for industrial production; and the prepared lithium titanate negative electrode material is high in yield, and also has excellent capacity performance, cycle performance and rate performance under high current density.
Owner:桑顿新能源科技(长沙)有限公司
Positive electrode, manufacturing method thereof and battery using positive electrode
ActiveCN110858644AImprove the electrochemical reaction rateImprove cycle lifeElectrode thermal treatmentCarbon nanotubesElectrical batteryFreeze-drying
The invention relates to a manufacturing method for a positive electrode, which comprises the following steps of: dispersing a plurality of carbon nanotubes in water to form a carbon nanotube dispersion liquid, adding an aniline solution to the carbon nanotube dispersion liquid to form a mixed liquid, the aniline solution comprising aniline, adding an initiator into the mixed solution and polymerizing the aniline into polyaniline under the action of the initiator so as to obtain a carbon nanotube composite structure prefabricated body, carrying out freeze drying on the carbon nanotube composite structure prefabricated body in a vacuum environment, after freeze drying, carbonizing under protective gas to form a carbon nanotube composite structure, and adding an electrode active material into the carbon nanotube composite structure. The invention also relates to the positive electrode manufactured by using the manufacturing method, and a battery using the positive electrode.
Owner:TSINGHUA UNIV +1
Preparation method of nickel-titanium-aluminum hydrotalcite supercapacitor electrode material with porous structure
ActiveCN113299490ALarge specific surface areaFully contactedHybrid capacitor electrodesHybrid/EDL manufactureElectrochemical responseCapacitance
The invention discloses a preparation method of a nickel titanium aluminum hydrotalcite supercapacitor electrode material with a porous structure, which comprises the following steps of: preparing nickel sulfate, aluminum sulfate and titanium sulfate into a mixed salt solution, and preparing urotropine into an aqueous solution; putting the mixed solution into a reaction kettle, sealing, and reacting at 160 DEG C for 4 hours; filtering the precipitate obtained by the reaction, washing with deionized water and ethanol respectively, and drying the product in a drying oven to obtain nickel-titanium-aluminum hydrotalcite powder; performing alkali etching on the obtained nickel-titanium-aluminum hydrotalcite powder in a NaOH solution to obtain nickel-titanium-aluminum hydrotalcite with a porous nanostructure; and cleaning and drying the etched product. The porous hydrotalcite nanosheet obtained by the method disclosed by the invention is beneficial to the flowing of electrolyte among pores vertical to the sheet layer, the flowing distance of the electrolyte is shortened, the contact of the electrolyte and an active substance is facilitated, and the electrochemical reaction rate is improved. The hydrotalcite prepared by adopting the method disclosed by the invention is applied to a supercapacitor electrode material and has relatively high specific capacitance.
Owner:LIAONING TECHNICAL UNIVERSITY
Defective K0.5Mn2O4 nano material, preparation method and zinc ion battery
ActiveCN112086634AEfficient preparation processThe preparation process is simple and environmentally friendlyMaterial nanotechnologyCell electrodesZinc ionBattery cell
The invention provides a defective K0.5Mn2O4 nano material, a preparation method and a zinc ion battery. The preparation method comprises the following steps of obtaining K0.5Mn2O4 powder growing on the surface of a substrate material by utilizing a hydrothermal method; and the K0.5Mn2O4 powder being subjected to plasma treatment, and the defect type K0.5Mn2O4 nano material is obtained. Accordingto the preparation method, the defect type K0.5Mn2O4 nano material prepared by adjusting the plasma etching time is stable in performance and structure and high in capacity, and can be used as an electrode material of a zinc ion battery.
Owner:ZHEJIANG NORMAL UNIVERSITY
Sodium fuel cell and cell stack containing sodium fuel cell
ActiveCN110400952AImprove the electrochemical reaction rateLower internal resistanceFuel cells groupingSolid electrolyte fuel cellsChemical physicsFuel cells
The invention discloses a sodium fuel cell and a cell stack containing the sodium fuel cell. The sodium fuel cell comprises and is assembled sequentially by a cathode flow field plate, a gas cathode,an electrolyte membrane and an anode flow field plate, wherein the anode flow field plate and the electrolyte membrane form an anode flow channel in a surrounding mode. The sodium fuel cell also comprises an insulating trickling flow pipe; the inlet end of the anode flow channel is connected with a first insulating trickling flow pipe; the outlet end of the anode flow channel is connected with a second insulating trickling flow pipe; molten sodium is injected to the anode flow channel through the first insulating trickling flow pipe; and an oxidant is injected into the cavity between the cathode flow field plate and the gas cathode. As the inlet end and the outlet end of the anode flow channel of the sodium fuel cell are connected with the insulating trickling flow pipes respectively, continuously flowing molten sodium can be changed into non-continuous and mutually insulated droplets in the insulating pipe, and on the premise of ensuring uniform flowing of the molten sodium, electrical insulation during the delivery process is kept.
Owner:江南山
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