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32results about How to "Complete crystal structure" patented technology
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Cobalt-free lithium-rich manganese-based cathode material as well as preparation method and application thereof
ActiveCN103943844AUniform particlesComplete crystal structureCell electrodesSecondary cellsSolid phasesSolvent
The invention discloses a cobalt-free lithium-rich manganese-based cathode material as well as a preparation method and application thereof. The cathode material has a chemical formula Li[1+x]Ni[y]Mn[0.8-y]O2 (x is more than 0 and less than 1 / 3 and y is more than 0 and less than 0.8). The preparation method comprises the following steps: preparing a precursor in an ethanol or de-ionized water solvent by adopting a sol-gel method, pre-sintering at the low temperature, performing ball-milling, and performing high-temperature solid-phase sintering to obtain the cathode material. The cathode material prepared by adopting the method is applied to lithium ion batteries, is high in specific discharge capacity (278mAh / g) and energy density, is expected to replace commercialized mainstream products-LiCoO2 cathode materials and lithium iron phosphate power batteries, and becomes a novel material of high-specific-capacity cathode materials for electric vehicles at present.
Owner:湘乡绿锂新材料科技有限公司
High-density spherical cobaltic-cobaltous oxide and method for preparing the same
InactiveCN101269848AImprove liquidityImprove performanceCobalt oxides/hydroxidesHigh densityCobalt(II,III) oxide
The invention provides a high density spherical shape Co3O4 and a preparation method thereof, and relates to a Co3O4, in particular to the preparation of the high density spherical shape Co3O4, which is mainly used for preparing lithium cobaltoxide of anode material of a lithium ion battery, and also is used as Co3O4 of electronic grade, and belongs to the products of chemical industry. The invention provides a preparation method of the high density spherical shape Co3O4 with good fluidity, the prepared Co3O4 is enabled to be a spherical shape particle which has best stacking density and can effectively improve the tap density of the particle, thereby improving the electrochemistry property of the lithium ion battery and the quality of the lithium ion battery. The Co3O4 prepared by the method is a spherical shape crystal, the mean grain size is 5-25 micrometers, the loose packed density is more than or equal to 1.0g / cm<3>, the tap density is more than or equal to 2.0g / cm<3>, and the cobalt content is more than or equal to 73 percent. The process of the method is simple, and the lithium cobaltoxide synthesized by the Co3O4 presents better property, compared with the past Co3O4, the electrochemistry property of the lithium ion battery can be improved.
Owner:GUANGZHOU RONGJIE MATERIAL TECH
Efficient zinc phosphate micro-nano anticorrosion agent preparation method
InactiveCN103896235AUniform sizeGood dispersionMaterial nanotechnologyAnti-corrosive paintsWater bathsMicro nano
The invention belongs to the field of inorganic chemistry, and particularly relates to an efficient zinc phosphate micro-nano anticorrosion agent preparation method, wherein the product is applied in the field of metal heavy corrosion. According to the present invention, a cycle ultrasonic cavitation effect and a high-temperature high-pressure water bath thermal effect are adopted to perform synchronous and synergetic regulation to prepare the efficient zinc phosphate micro-nano anticorrosion agent, wherein the synchronous and synergetic effect of the two effects is adopted so as to make the product system be well dispersed, ensure the uniformity of crystal nucleation and effectively solve the difficult problem of difficult synchronous regulation on the particle size and the crystallization degree of the nanometer crystal, and a microwave heating mode is adopted to dry the product so as to reduce the agglomeration; the prepared micro-nano zinc phosphate product has advantages of high purity, complete crystallinity, narrow particle size distribution, good dispersion and the like, wherein the effective corrosion protection time of the zinc phosphate micro-nano anticorrosion agent is up to 1056 h and is far superior to the effective corrosion protection time of the commercially available zinc phosphate anticorrosion material; and the method has characteristics of simple process and low cost, and is suitable for large-scale production.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for preparing superfine and high-dispersibility lithium iron phosphate
The invention discloses a novel method for preparing a lithium iron phosphate power battery anode material, which belongs to the field of novel materials and new energy resources. The method comprises the following steps of: firstly, carrying out nano processing on lithium salt and iron salt of raw materials of lithium iron phosphate, to obtain a raw material with small and uniform particles; and further uniformly mixing the raw materials under the action of a dispersant, a surface active agent and ball milling, preventing nonuniformity generation in the drying process by freezing and drying and preventing the growth of particles by low-temperature synthesis and high-temperature rapid crystallization so as to obtain the lithium iron phosphate anode material with small particles, uniform dispersion and stable quality.
Owner:成都联禾化工医药有限责任公司
A kind of cobalt-free lithium-rich manganese-based positive electrode material and its preparation method and application
ActiveCN103943844BUniform particlesComplete crystal structureCell electrodesSecondary cellsManganeseSolvent
The invention discloses a cobalt-free lithium-rich manganese-based cathode material as well as a preparation method and application thereof. The cathode material has a chemical formula Li[1+x]Ni[y]Mn[0.8-y]O2 (x is more than 0 and less than 1 / 3 and y is more than 0 and less than 0.8). The preparation method comprises the following steps: preparing a precursor in an ethanol or de-ionized water solvent by adopting a sol-gel method, pre-sintering at the low temperature, performing ball-milling, and performing high-temperature solid-phase sintering to obtain the cathode material. The cathode material prepared by adopting the method is applied to lithium ion batteries, is high in specific discharge capacity (278mAh / g) and energy density, is expected to replace commercialized mainstream products-LiCoO2 cathode materials and lithium iron phosphate power batteries, and becomes a novel material of high-specific-capacity cathode materials for electric vehicles at present.
Owner:湘乡绿锂新材料科技有限公司
Preparing method of high-performance multi-sized nanostructure skutterudite material
InactiveCN105936985AComplete crystal structureGood shape and performanceMaterial nanotechnologyDecompositionNitrogen atmosphere
The invention provides a preparing method of a high-performance multi-sized nanostructure skutterudite material. Firstly, a high-temperature melting quenched method is adopted to prepare a thermoelectric material ingot casting, then, a simple and easily-controlled low-temperature refrigeration-grinding method is adopted to prepare nanoscale thermoelectric powder, and refrigeration-grinding is a novel grinding method. Liquid nitrogen is adopted to serve as a refrigeration medium, and the material is ground at the ultralow temperature of -195.6 DEG C. The method has the beneficial effects that the material can be ground at the temperature lower than the temperature of the brittle point of the material, and refining of powder is facilitated; inert nitrogen atmosphere provides protection atmosphere for the material, and oxidization of the material is reduced; the low-temperature liquid nitrogen can bring out a large amount of heat generated in the grinding process, and phase changes or decomposition of the material due to temperature rise is avoided; and finally, through the discharge plasma sintering technology, the high-performance nanostructure skutterudite thermoelectric material is obtained.
Owner:DONGHUA UNIV
Method for removing arsenic from acidic arsenic-containing solution by using iron salt
ActiveCN110104753AHigh in arsenicImprove long-term stabilityWater contaminantsWaste water treatment from metallurgical processIron saltsFerrous salts
The invention discloses a method for removing arsenic from an acidic arsenic-containing solution by using an iron salt. The method comprises the following steps: (1) adjusting the pH value of the acidic arsenic-containing solution, stirring and heating the adjusted solution, and adding a ferrous salt to obtain a mixed solution; and (2) adding magnetite to the mixed solution, adding an oxidant, stirring, heating and reacting the obtained solution, and filtering the solution to remove scorodite filter residues in order to complete the removal of arsenic in the acidic arsenic-containing solution.A precipitate obtained after arsenic precipitation of new highly-active crystal seeds is iron arsenate with a good crystal form, and has the advantages of high arsenic content, small size, complete crystal form structure, low toxicity leaching concentration of arsenic, good long-term stability, and easiness in clarification, filtration and separation. The method has the advantages of mild processconditions, simple process, convenience in operation, small dosages of reagents, small amount of arsenic iron residues, low price and low cost of the raw material, and realization of the production of the iron arsenate precipitate-scorodite with the good crystal form from the acidic arsenic-containing solution of copper smelting flue dust.
Owner:CENT SOUTH UNIV
Preparation method of polycrystalline mullite fiber
InactiveCN106757523AComplete crystal structureTightly boundInorganic material artificial filamentsArtifical filament manufactureAluminium chloridePolyvinyl alcohol
The invention relates to the technical field of functional materials and particularly relates to a preparation method of a polycrystalline mullite fiber. The preparation method of the polycrystalline mullite fiber comprises the following steps: carrying out reflux at 90-100 DEG C for 5-8 hours by taking water as a solvent as well as powdered aluminum and AlCl3 as raw materials, so as to obtain colorless transparent poly aluminium chloride sol; adding acidy silica sol according to a mount that m(Al):m(Si)=3:1, and carrying out vacuum concentration at 50-60 DEG C by taking 3% polyvinyl alcohol as a spinning aid so as to remove partial free water, so as to obtain precursor sol with a viscosity of 4000-6000; and preparing a precursor fiber from the precursor sol by virtue of a thread throwing method, drying the obtained precursor fiber at 60-80 DEG C for 4-6 hours, and carrying out thermal treatment at 800-1300 DEG C for 2 hours, so as to finally obtain the polycrystalline mullite fiber. The polycrystalline mullite fiber prepared by virtue of the preparation method has the beneficial effects that the crystal structure tends to be complete, the fiber diameter is 3-6 microns, and grains are uniform in size and tightly jointed.
Owner:SHAANXI SHENGMAI PETROLEUM
Solid solution type FexCo1-xS2 positive electrode material for thermal batteries, and preparation method of solid solution type FexCo1-xS2 positive electrode material
ActiveCN108539195APrecise control of active ingredient ratiosSingle componentDeferred-action cellsPositive electrodesVulcanizationInternal resistance
The invention aims at providing a solid solution type FexCo1-xS2 positive electrode material for thermal batteries, and a preparation method of the solid solution type FexCo1-xS2 positive electrode material. The component contents of a Fe-Co alloy skeleton is precisely controlled by a Raney method, and a FexCo1-xS2 solid solution is synthesized by means of a high temperature solid phase vulcanization method. The preparation method provided by the invention can realize the precise regulation and control of the atomic ratio in a target product simply by changing a feeding proportion, and provides the performance-oriented positive electrode material in a customized way aiming at the electrical performance requirements of the thermal batteries. The solid solution type FexCo1-xS2 positive electrode material obtained by using the preparation method provided by the invention has the characteristics of being controllable in active component content, high in electrode potential, stable in voltage platform, small in polarization internal resistance and high in thermal stability; thermal decomposition temperature of the positive electrode material is not lower than 570 DEG C, and the actual discharge specific capacity is not lower than 1300 As / g.
Owner:SHANGHAI INST OF SPACE POWER SOURCES
Low specific gravity composite thermally-conductive insulating glue and preparation method thereof
InactiveCN106995673ALight weightImprove thermal conductivityNon-macromolecular adhesive additivesEpoxy resin adhesivesEpoxyCarbon nitride
The invention provides low specific gravity composite thermally-conductive insulating glue, which is prepared from filler, a coupling agent, epoxy resin and a curing agent, wherein the filler is prepared from graphite-like carbon nitride. The composite thermally-conductive insulating glue, which is high in heat conductivity coefficient, excellent in mechanical property, good in insulating property and low in specific gravity, is prepared by taking the graphite-like carbon nitride as main heat conduction filler, taking the coupling agent as a surface modifying agent and taking the epoxy resin as matrix.
Owner:GUANGDONG UNIV OF TECH
Metal organic framework forming body and preparation method and application thereof
ActiveCN112679965AImprove adsorption capacitySolve the fragileOther chemical processesOrganic-compounds/hydrides/coordination-complexes catalystsPhysical chemistryMetal-organic framework
The invention relates to the field of metal organic frameworks, and discloses a metal organic framework forming body and a preparation method and application thereof. The metal organic framework molded body comprises MOFs and a binder; wherein the amount of the binder is 0.005-1.8 parts by weight per 100 parts by weight of the metal organic framework forming body. The metal organic framework forming body is prepared by adopting a sol-gel method, so that the damage to the MOFs structure caused by granulation, briquetting or tabletting and other modes of a granulator is avoided. The metal organic framework forming body has the advantages of being high in structural retention rate, high in crushing strength, high in sulfur capacity, good in renewability and the like. The adsorbent is wide in application range, is especially suitable for removing sulfides, and has good adsorption and regeneration performances.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of powder type high-capacity titanium-based lithium ion exchanger
InactiveCN110215935ASolve the situation where washing is difficultNo residueCation exchanger materialsWater contaminantsHigh concentrationProduction line
The invention provides a preparation method of a powder type high-capacity titanium-based lithium ion exchanger, wherein the titanium source is metatitanic acid on a sulfuric acid process production line, and the precursor can be prepared at low lithium source consumption and short calcination time. The lithium ion elution process of a precursor comprises stirring and adding acid to remove lithiumin a tank, that concentration of slurry H+ in the tank is controlled to prevent the dissolution of titanium, the dissolved lithium is concentrated in a solution, the solid and liquid are separated toobtain a lithium solution with high concentration and low acidity, the concentration energy consumption is reduced and alkali for neutralizing waste acid is reduced, thereby greatly reducing production cost.
Owner:JIANGSU TOP FINE NEW RAW MATERIAL CO LTD +1
Method for preparing calcium-magnesium-aluminum iron hydrotalcite by taking high-magnesium phosphate tailings as raw material
InactiveCN111285407AComplete crystal structureUniform grainIron compoundsMagnesium phosphateIron salts
The invention provides a method for preparing calcium-magnesium-aluminum iron hydrotalcite by taking high-magnesium phosphate tailings as a raw material. The method comprises the following steps: washing, drying and calcining phosphate tailings to remove organic matters, soaking and dissolving the phosphate tailings in acid, adding a dephosphorizing agent for reaction to remove phosphorus, performing filtering to obtain a calcium-magnesium salt solution, adding an aluminum salt solution and an iron salt solution into the calcium-magnesium salt solution, dropwisely adding the mixed solution into an alkaline solution B, carrying out coprecipitation reaction, and carrying out crystallizing, cooling, filtering, washing and drying to obtain the calcium-magnesium-aluminum-iron hydrotalcite. Thecalcium-magnesium-aluminum hydrotalcite prepared by taking high-magnesium phosphate tailings as a raw material has excellent flame retardant property and interlayer ion exchangeability, and can be widely applied to the fields of plastics, environmental protection and the like. A new way is opened up for comprehensive utilization of the phosphate tailings, the additional value of phosphate tailingproducts is greatly improved, the problem of environmental pollution caused by the phosphate tailings is solved, the ecological environment is improved, and huge economic, social and environmental benefits are achieved.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation method for improving quality of gallium nitride crystals
ActiveCN105483828AQuality improvementComplete crystal structureFrom gel statePolycrystalline material growthSemiconductor materialsPolyvinyl alcohol
The invention belongs to the field of inorganic compound semiconductor materials, and more particularly relates to a preparation method for improving the quality of gallium nitride crystals. The preparation method comprises the following steps: firstly, dispersing metal gallium salt and a nucleation inducer in a polyvinyl alcohol water solution, adding a water-based adhesive and stirring at a high speed, such that the gallium salt and the nucleation inducer are coated in a gel network structure formed from polyvinyl alcohol; then carrying out high-pressure homogenization to form nano composite gel; uniformly coating the obtained composite gel onto an Si substrate subjected to surface treatment; putting the Si substrate in a tube furnace and drying in a nitrogen atmosphere, and then raising the temperature of the tube furnace to 850 to 1050 DEG C; introducing ammonia to react for 90 to 110min; stopping introducing the ammonia and cooling to room temperature in the nitrogen atmosphere to obtain faint yellow gallium nitride crystals having a regular crystal form. According to the preparation method, the gallium nitride crystals are prepared by coating the composite nano gel formed by the gallium salt and the nucleation inducer onto the Si substrate, such that the gallium nitride crystals are good in surface appearance, regular in crystal form, high in yield and high in purity and have a wide application value.
Owner:GUANGDONG GOPOD GRP HLDG CO LTD
A kind of hydrothermal method prepares the method for lithium iron phosphate equimolar
ActiveCN105680044BSlow growth rateGuaranteed charge balanceCell electrodesSecondary cellsPolymer scienceLithium iron phosphate
The present invention discloses a method of preparing iron phosphate such as water and heat method. The steps include (1) the iron phosphate stabilizer dissolved in oxygen distilled water, stir and add the sub -railway source to form a mixture A;2) According to Fe2+: li+= 1: 1, weigh LiH2PO4 dissolved to form solution B; (3) mix mixture A with solution B, add a high -pressure reactor, adjust pH = 6 ~ 8;The wave -type heating reactor to 160 ~ 200 ° C for 4 ~ 6h, naturally cool to room temperature, filter, washing, and vacuum drying.The Lifepo4 positive material made by this method is excellent, and the 0.2C discharge ratio has a capacity of 152mAh / g.
Owner:RIZHAO HUAXUAN NEW ENERGY
Method for microwave synthesis of lithium iron phosphate material
InactiveCN111326812AIncrease contentImprove electrochemical performancePhosphatesCell electrodesMaterials scienceLithium battery
The invention relates to a method for microwave synthesis of a lithium iron phosphate material, and particularly discloses a method for microwave synthesis of a lithium iron phosphate material by using a waste battery. The method specifically comprises the steps of (1) selecting a waste lithium iron phosphate battery, carrying out discharge treatment on the waste lithium iron phosphate battery, and disassembling to obtain a positive plate; (2) calcining the positive plate obtained in the step (1) at the temperature of 300-500 DEG C for 1-10 hours, taking out the positive plate after the temperature is reduced to room temperature, and mechanically vibrating the positive plate to enable lithium iron phosphate to fall off from a current collector aluminum foil to obtain lithium iron phosphatepowder; and (3) mixing the lithium iron phosphate powder, a lithium source, an iron source, a phosphorus source and a carbon source, performing ball milling, performing microwave treatment for 10-100seconds, and repeating the steps of ball milling and microwave treatment until lithium iron phosphate particles are obtained. The process is simple to operate, the process is easy to control, the energy consumption is low, the method is environmentally friendly, secondary pollutants are not generated, and meanwhile, the repaired lithium iron phosphate material can be reused for producing lithiumion batteries.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Alkali metal salt assisted ultrasonic stripping processed graphene as well as preparation method and application thereof
The invention discloses alkali metal salt assisted ultrasonic stripping processed graphene as well as a preparation method and an application thereof and relates to the field of preparation and application of graphene. According to the preparation method, graphite powder and alkali metal salt are added to an organic solvent, and the mixture is subjected to ultrasonic treatment, so that graphite powder is stripped, wherein the alkali metal salt is pyrophosphate or phosphate; an obtained product is centrifuged at the rotating speed of 1,000-8,000 r / min for 5-40 min, precipitates are discarded, aliquid supernatant is obtained, and an ultrasonic stripping processed graphene suspension solution is obtained. The pyrophosphate is sodium pyrophosphate or potassium pyrophosphate, the phosphate issodium phosphate or potassium phosphate, and the organic solvent is N, N-dimethyl formamide or N-methyl pyrrolidone. The stripping efficiency of the graphene prepared through ultrasonic stripping is improved, the thickness of the graphene is effectively reduced, meanwhile, the active sites of the graphene are increased, and the electrochemical sensing performance of the graphene is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for equal molar preparation of lithium iron phosphate by hydrothermal method
ActiveCN105680044ASlow growth rateGuaranteed charge balanceCell electrodesSecondary cellsHigh pressureOxygen
The invention discloses a method for equal molar preparation of lithium iron phosphate by a hydrothermal method. The method comprises the following steps: (1) dissolving weighed iron phosphate stabilizer into deoxidized distilled water, stirring the deoxidized distilled water and adding an iron ferrous source to form a mixed solution A; (2) dissolving weighed LiH<2>PO<4> at the ratio of Fe<2+> to Li<+> being 1 to 1 to form a solution B; and (3) mixing the mixed solution A with the solution B evenly, adding the mixture to a high-pressure reaction kettle, adjusting the pH to be 6-8, introducing an inert gas, heating the reaction kettle to 160-200 DEG C for heat preservation for 4-6 hours in a wave mode, naturally cooling the reaction kettle to a room temperature, carrying out filtering, washing and vacuum drying to obtain a cathode material LiFePO<4>. The cathode material LiFePO<4> prepared by the method is excellent in performance; and the specific discharge capacity at 0.2C reaches 152mAh / g.
Owner:RIZHAO HUAXUAN NEW ENERGY
Process for preparing Co3O4
InactiveCN1151971CSimple processThe process is simple and easy to controlCobalt oxides/hydroxidesNitrateCobalt(II,III) oxide
A process for preparing Co3O4 includes such steps as dissolving Co in nitric acid, hydrochloric acid or sulfuric acid to generate cobolt nitrate (or sulfate, or chloride), dissolving precipitant and complexing agent in deionized water to prepare saturated solution, adding the prepared to solution to reactor, regulating pH=4-5.5, adding complexing precipitant at 35-100 deg.c while stirring, reacting, filtering, washing with deionized water at temp higher than 90 deg.C, calcining at 300-1000 deg.C for 5-25 hr, pulverizing and classifying.
Owner:戴振华
A kind of preparation method of high-efficiency zinc phosphate micro-nano antiseptic
InactiveCN103896235BUniform particle sizeGood dispersionMaterial nanotechnologyAnti-corrosive paintsMicro nanoWater baths
The invention belongs to the field of inorganic chemistry, and particularly relates to an efficient zinc phosphate micro-nano anticorrosion agent preparation method, wherein the product is applied in the field of metal heavy corrosion. According to the present invention, a cycle ultrasonic cavitation effect and a high-temperature high-pressure water bath thermal effect are adopted to perform synchronous and synergetic regulation to prepare the efficient zinc phosphate micro-nano anticorrosion agent, wherein the synchronous and synergetic effect of the two effects is adopted so as to make the product system be well dispersed, ensure the uniformity of crystal nucleation and effectively solve the difficult problem of difficult synchronous regulation on the particle size and the crystallization degree of the nanometer crystal, and a microwave heating mode is adopted to dry the product so as to reduce the agglomeration; the prepared micro-nano zinc phosphate product has advantages of high purity, complete crystallinity, narrow particle size distribution, good dispersion and the like, wherein the effective corrosion protection time of the zinc phosphate micro-nano anticorrosion agent is up to 1056 h and is far superior to the effective corrosion protection time of the commercially available zinc phosphate anticorrosion material; and the method has characteristics of simple process and low cost, and is suitable for large-scale production.
Owner:EAST CHINA UNIV OF SCI & TECH
A preparation method for improving the quality of gallium nitride crystal
ActiveCN105483828BQuality improvementComplete crystal structureFrom gel statePolycrystalline material growthWater basedSemiconductor materials
The invention belongs to the field of inorganic compound semiconductor materials, and more particularly relates to a preparation method for improving the quality of gallium nitride crystals. The preparation method comprises the following steps: firstly, dispersing metal gallium salt and a nucleation inducer in a polyvinyl alcohol water solution, adding a water-based adhesive and stirring at a high speed, such that the gallium salt and the nucleation inducer are coated in a gel network structure formed from polyvinyl alcohol; then carrying out high-pressure homogenization to form nano composite gel; uniformly coating the obtained composite gel onto an Si substrate subjected to surface treatment; putting the Si substrate in a tube furnace and drying in a nitrogen atmosphere, and then raising the temperature of the tube furnace to 850 to 1050 DEG C; introducing ammonia to react for 90 to 110min; stopping introducing the ammonia and cooling to room temperature in the nitrogen atmosphere to obtain faint yellow gallium nitride crystals having a regular crystal form. According to the preparation method, the gallium nitride crystals are prepared by coating the composite nano gel formed by the gallium salt and the nucleation inducer onto the Si substrate, such that the gallium nitride crystals are good in surface appearance, regular in crystal form, high in yield and high in purity and have a wide application value.
Owner:GUANGDONG GOPOD GRP HLDG CO LTD
A kind of solid solution type Fexco1-xs2 cathode material for thermal battery and preparation method thereof
ActiveCN108539195BPrecise control of active ingredient ratiosSingle componentDeferred-action cellsPositive electrodesElectrode potentialElectrical battery
The invention aims at providing a solid solution type FexCo1-xS2 positive electrode material for thermal batteries, and a preparation method of the solid solution type FexCo1-xS2 positive electrode material. The component contents of a Fe-Co alloy skeleton is precisely controlled by a Raney method, and a FexCo1-xS2 solid solution is synthesized by means of a high temperature solid phase vulcanization method. The preparation method provided by the invention can realize the precise regulation and control of the atomic ratio in a target product simply by changing a feeding proportion, and provides the performance-oriented positive electrode material in a customized way aiming at the electrical performance requirements of the thermal batteries. The solid solution type FexCo1-xS2 positive electrode material obtained by using the preparation method provided by the invention has the characteristics of being controllable in active component content, high in electrode potential, stable in voltage platform, small in polarization internal resistance and high in thermal stability; thermal decomposition temperature of the positive electrode material is not lower than 570 DEG C, and the actual discharge specific capacity is not lower than 1300 As / g.
Owner:SHANGHAI INST OF SPACE POWER SOURCES
A kind of preparation method of cerium-praseodymium stabilized zirconia polishing powder
ActiveCN107201178BImprove removal rateImprove yield ratePolishing compositions with abrasivesCeriumCoprecipitation
Owner:山东麦丰新材料科技股份有限公司
A method for removing arsenic from acidic arsenic-containing solution by using iron salt
ActiveCN110104753BHigh in arsenicImprove long-term stabilityWater contaminantsWaste water treatment from metallurgical processFerrous saltsFiltration
Owner:CENT SOUTH UNIV
A kind of preparation method of electric field activated supercapacitor
ActiveCN103258655BImprove electrochemical stabilityComplete crystal structureHybrid/EDL manufactureCapacitanceBiological activation
The invention discloses a method for preparing electric field activation type super capacitors. According to the method, electrode active material is respectively mixed with adhesive and conductive agent evenly, graphite-like material electrode pieces are manufactured on the surface of a metal collector electrode by utilization of the mixture, the manufactured graphite-like electrode pieces are used as positive electrodes and negative electrodes of electrodes of the capacitors, separating membranes are adopted to separate the electrodes, ionic liquid with molecular weight equal to or smaller than 500 is used as electrolyte to assemble the capacitors, electric field activation is performed, and the electric field activation type super capacitors are manufactured. A potential window of the electrolyte of the super capacitors is wide, and rated working voltage of the capacitors is improved; the electrolyte is small in molecular volume, and inserting embedding-emigrating out can be performed among graphite layers under the condition of the electric field activation; electrochemical performance of the electrolyte is stable, the electric field activation can be performed under the condition of high voltage, electrolyte ions can be fully inserted and embedded among the graphite layers, and high-inserting-layer electrostatic capacitors are obtained.
Owner:锦州凯美能源有限公司
A kind of layered structure copper-based catalyst and its preparation method and application
ActiveCN105562009BHigh crystallinityComplete crystal formOrganic compound preparationHydroxy compound preparationDispersityBiological activation
The invention discloses a layered structure copper-based catalyst and its preparation method and application. The layered structure copper-based catalyst comprises the following components in weight percentage: Cu: 26-65%; ZnO: 22-52%; Al2O3 :6‑22%. The copper-based catalyst with a layered structure of the present invention has a large specific surface area, a small loss of copper and a high degree of dispersion, which is beneficial to the adsorption and activation of reactants, and overcomes the low conversion rate of catalytic carbon dioxide and methanol selectivity of existing carbon dioxide hydrogenation methanol synthesis catalysts. Poor disadvantages.
Owner:SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
A kind of ternary cathode material for NCF type thermal battery and preparation method thereof
ActiveCN112614996BImprove positive electrode utilizationImprove performanceDeferred-action cellsPositive electrodesHigh pressure hydrogenPhysical chemistry
The invention relates to a ternary cathode material for an NCF thermal battery and a preparation method thereof, belonging to the technical field of material chemistry. The object of the present invention is to provide a kind of NCF type thermal battery ternary positive electrode material and preparation method thereof, prepare M(C 2 o 4 )·nH 2 O(M:Ni, Co, Fe) solid solution precursor, and then through the high-pressure hydrogen reduction-sulfur steam vulcanization method, the cubic phase Ni can be obtained 0.1 co 0.45 Fe 0.45 S 2 Ternary cathode materials for thermal batteries. By adopting the preparation method provided by the invention, the obtained ternary cathode material has the characteristics of complete crystal structure, low self-loss rate, high capacity utilization rate and the like.
Owner:SHANGHAI INST OF SPACE POWER SOURCES
Method for preparing high-purity calcium hydrogen phosphate
InactiveCN103935972AHigh purityComplete crystal structurePhosphorus compoundsDecompositionPhosphoric acid
The invention discloses a method for preparing high-purity calcium hydrogen phosphate. The method comprises the specific process: adopting a phosphoric acid solution, liquid ammonia and a calcium chloride solution as initial raw materials, under a certain temperature, flow quantity and stirring, synthesizing calcium hydrogen phosphate dihydrate from a diammonium hydrogen phosphate solution and the calcium chloride solution by adopting a double decomposition process and under double liquid phases, and thus obtaining a calcium hydrogen phosphate dihydrate wet material and an ammonium chloride-containing mother solution; carrying out solid-liquid separation of the slurry, then washing with purified water until the content of chloride ions in a calcium hydrogen phosphate dihydrate filter cake is less than 0.05%, drying the calcium hydrogen phosphate dihydrate filter cake by a dryer to obtain the high-purity calcium hydrogen phosphate; and adding solid calcium oxide into the obtained ammonium chloride-containing mother solution, and carrying out ammonia steaming and all recycling. The method has the advantages of simple synthetic process, easy obtained raw materials, and low cost; and the by-product of the obtained ammonium chloride-containing mother solution can be all recycled, and has little pollution to the environment.
Owner:SUQIAN MODERN BIOLOGY TECH CO LTD
Method for preparing composite flame retardant of organic acid pillared hydrotalcite using phosphorus tailings
ActiveCN111154140BComplete crystal structureUniform grainCalcium/strontium/barium compoundsFiltrationSodium salt
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Method for preparing superfine and high-dispersibility lithium iron phosphate
The invention discloses a novel method for preparing a lithium iron phosphate power battery anode material, which belongs to the field of novel materials and new energy resources. The method comprises the following steps of: firstly, carrying out nano processing on lithium salt and iron salt of raw materials of lithium iron phosphate, to obtain a raw material with small and uniform particles; andfurther uniformly mixing the raw materials under the action of a dispersant, a surface active agent and ball milling, preventing nonuniformity generation in the drying process by freezing and drying and preventing the growth of particles by low-temperature synthesis and high-temperature rapid crystallization so as to obtain the lithium iron phosphate anode material with small particles, uniform dispersion and stable quality.
Owner:成都联禾化工医药有限责任公司
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