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41results about How to "Excellent electrochemical lithium storage performance" patented technology
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CuO-Cu2O/graphene nano compound material and preparation method thereof
InactiveCN103956473AShort reaction timeReduce energy consumptionMaterial nanotechnologyCell electrodesGraphene nanocompositesElectrochemistry
The invention discloses a CuO-Cu2O / graphene nano compound material and a preparation method thereof. The CuO-Cu2O / graphene nano compound material disclosed by the invention is characterized in that CuO-Cu2O nano spheres are uniformly dispersed on the surface of graphene, are of a hollow structure, and comprise CuO nano crystals and Cu2O nano crystals through mixing. The preparation method comprises the following steps: mixing a defined amount of a copper slat and graphite oxide, dispersing to form a uniform solution, and adding a defined amount of ammonia water for adjusting a pH value; then placing a mixed solution in a microwave reactor, and performing a microwave heating reaction to prepare a precursor; and finally, calcining the precursor in an inert atmosphere at a high temperature of 450-700 DEG C for 1-3 hours, and calcining the precursor in an air atmosphere at a low temperature of 150-250 DEG C for 1-2 hours to obtain the CuO-Cu2O / graphene nano compound material. The CuO-Cu2O / graphene nano compound material disclosed by the invention is simple in preparation process, low in cost, and good in electrochemical property, and can be applied to a lithium battery electrode.
Owner:ZHEJIANG NORMAL UNIVERSITY
Graphene/nickel sulphide nano composite electrode material and preparation method thereof
InactiveCN104183848AEasy to synthesizeEasy to operateMaterial nanotechnologyCell electrodesSolventNickel sulfide
The invention discloses a graphene / nickel sulphide nano composite electrode material and a preparation method thereof. The graphene / nickel sulphide nano composite electrode material is prepared under the crosslinked action of graphene with graphene oxide as a carrier, nickel acetate as a nickel source and carbon disulphide as a sulphur source. The graphene / nickel sulphide nano composite electrode material comprises graphene nanosheets and nickel sulphide flower-type submicrostructure ingredients in a mass ratio of (5-35%): (95-65%). The preparation method of the graphene / nickel sulphide nano composite electrode material has the advantages that graphene oxide, nickel acetate and carbon disulphide are taken as raw materials and the graphene / nickel sulphide nano composite electrode material is obtained by adopting a one-pot solvothermal method in an organic solvent, and the graphene / nickel sulphide nano composite electrode material has good electrochemical lithium storage property and can serve as a cathode material for a lithium ion battery.
Owner:NANCHANG HANGKONG UNIVERSITY
Vanadium pentoxide nanobelt, and room-temperature synthesis method and application of vanadium pentoxide nanobelt
InactiveCN104261472AIncrease chemical potentialEasy to moveMaterial nanotechnologyVanadium oxidesSynthesis methodsElectrochemistry
The invention discloses a vanadium pentoxide nanobelt, and a room-temperature synthesis method and an application of the vanadium pentoxide nanobelt, and belongs to the technical fields of nanometer materials and electrochemical energy storage. The room-temperature synthesis method of the vanadium pentoxide nanobelt, which is disclosed by the invention, comprises the following steps: adding a mineralizer to a vanadium source water solution, and then putting the vanadium source water solution with the mineralizer at room temperature to stir; and after complete reaction, washing and collecting the vanadium pentoxide nanobelt, wherein the vanadium pentoxide nanobelt is a uniform ultra-long nanobelt, is 10-20 microns in length and is 20-50 manometers in width. The synthesis method can be simple at room temperature and pressure, low in cost and high in yield, can be used for preparing the V2O5 nanobelt in large quantities, and has the characteristics of being low in cost, simple in process, convenient to operate, low in energy consumption, easy to control, convenient for large-scale production and the like; and the vanadium pentoxide nanobelt prepared by the method has good charge and discharge performances of a lithium ion battery.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Preparation method of lithium iron phosphate/graphene nano composite material
InactiveCN102751496AGood dispersionUniform dispersionCell electrodesNano compositesGraphene nanocomposites
The invention relates to a preparation method of lithium iron phosphate / graphene nano composite material. The preparation method comprises the steps of dispersing iron trioxide / graphene composite into a solvent, and adding ascorbic acid, lithium hydrate and phosphoric acid to obtain a precursor dispersing agent; and arranging the precursor dispersing agent into a reactor, and conducting solvent thermal reaction for 1-48h at 90-350 DEG C.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Preparation method of SnS2 nanoplate anode material of a lithium-ion battery
InactiveCN101609887AImprove cycle stabilityHigh electrochemical lithium storage capacityElectrode manufacturing processesElectrochemistryLithium-ion battery
The invention discloses a preparation method of SnS2 nanoplate anode material of a lithium-ion battery, comprising the following steps: dissolving L-cysteine in deionized water, then adding stannic chloride and fully stirring the solution to dissolve the stannic chloride; transferring the mixed solution in a reaction kettle with a polytetrafluoroethylene tank to react hydrothermal reaction at 180-220 DEG C for 8-12h, then cooling to the room temperature, centrifugalizing the products to obtain precipitate, cleaning and drying the precipitate fully to obtain the SnS2 nanoplate anode material of a lithium-ion battery; wherein, the molar ratio of L-cysteine to stannic chloride is 4:1-8:1. The SnS2 nanoplate anode material of a lithium-ion battery prepared by the method of the invention has high electrochemical capacity and good cyclic stability.
Owner:ZHEJIANG UNIV
Nano-silicon and silicon/carbon composite material based on cut silicon waste, and preparation method and application thereof
InactiveCN110289408AAbundant raw materialsLow costMaterial nanotechnologyElectrolysis componentsCarbon compositesElectrolysis
The invention discloses a nano silicon and silicon / carbon composite material based on cut silicon waste and a preparation method and application thereof. The preparation method of the nano silicon comprises the following steps: mixing the cut silicon waste and metal magnesium powder, performing tabletting, performing wrapping with foamed nickel, and binding the mixture on a metal molybdenum rod current collector by using a fine molybdenum wire to serve as an anode; connecting the metal molybdenum rod with a stainless steel current collector to serve as a cathode; taking magnesium salt as molten salt; and performing soaking and alloying for 0.5-3 hours in the molten magnesium salt, applying a voltage of 1-2 V to the soaked and alloyed anode and cathode, carrying out constant-current electrolysis for 2-12 hours, taking out the anode and cathode, performing cooling, cleaning, pickling and drying to obtain the nano silicon; mixing carbon precursors and nano-silicon, and performing ultrasonic dispersion and hydrothermal-in-situ polymerization and pyrolysis carbonization to obtain a silicon / carbon composite material. The nano-silicon and silicon / carbon composite material prepared by the method shows good discharge specific capacity, rate capability and cycling stability, and the method has the advantages of rich raw materials, low cost, simple operation process and the like.
Owner:NORTHEASTERN UNIV
Preparation method of double-modified SnO<2>@C/graphene nano composite anode material
ActiveCN105609722ANanoscale smallGood dispersionCell electrodesSecondary cellsHigh current densityLithium
The invention provides a preparation method of a double-modified SnO<2>@C / graphene nano composite anode material, relates to the preparation method of the anode material, and aims at solving the problems of poor cycle performance and lithium storage property of SnO<2> and graphene composite prepared by an existing method when used as the anode material at high current density. The preparation method comprises the following steps: (1) preparing nano carbon spheres; (2) preparing SnO<2>@C through a two-step method to obtain an SnO<2>@C composite material; and (3) carrying out microwave hydrothermal reaction to obtain SnO<2>@C / graphene composite material solid powder, namely double-modified SnO<2>@C / graphene nano composite anode material. The preparation method is mainly used for preparing the double-modified SnO<2>@C / graphene nano composite anode material.
Owner:HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Carbon nanotube limited range selenium composite anode material and preparation method thereof
ActiveCN109346684AExcellent electrochemical lithium storage performanceImprove discharge specific capacityMaterial nanotechnologyCell electrodesNanoparticleCarbon nanotube
The invention discloses a carbon nanotube limited range selenium composite anode material and a preparation method thereof. In the composite anode material, elemental selenium nanoparticles are limited within a nano space of a one-dimensional limited range of carbon nanotubes at a mass ratio of (0.5-5.0):1. The preparation method comprises the following steps: (1) putting the carbon nanotubes intoa strong acid, stirring, and carrying out heating purification treatment to obtain purified carbon nanotubes; (2) grinding the purified carbon nanotubes obtained in the step (1) with selenium powder,sufficiently mixing, and carrying out low-temperature thermal treatment in a protective atmosphere to obtain the carbon nanotube limited range selenium composite anode material. The carbon nanotube limited range selenium composite anode material disclosed by the invention is capable of inhibiting volume expansion and a shuttling effect, and is high in discharge specific capacity and excellent inhigh magnification charge / discharge performance and circulation performance; and the method disclosed by the invention is simple in process, low in cost and suitable for industrial production.
Owner:CENT SOUTH UNIV
Preparation method and use of MnO@ nitrogen-doped porous carbon nanocomposite
InactiveCN109830672AImprove electrochemical performanceSimple manufacturing methodMaterial nanotechnologyCell electrodesWater bathsMANGANESE ACETATE
The invention discloses a method for preparing a MnO@ nitrogen-doped porous carbon nanocomposite, comprising the steps of dissolving trimesic acid in deionized water at 80 degrees centigrade; maintaining a constant temperature in a water bath for a period of time; then dissolving manganese acetate in the deionized water; pouring a manganese acetate solution into a trimesic acid solution and stirring the two solutions at a constant temperature; after a constant-temperature reaction for a period of time, washing and centrifuging the reaction product to obtain a metal-organic framework, namely Mn-BTC powder; drying the Mn-BTC powder in a constant-temperature drying oven; and calcining the Mn-BTC powder in an ammonia atmosphere to obtain the MnO@ nitrogen-doped porous carbon nanocomposite. TheMnO@ nitrogen-doped porous carbon nanocomposite exhibits excellent electrochemical performance in lithium ion storage, and the porous carbon can alleviate the volume expansion of manganese oxide in alithiation process.
Owner:HEFEI UNIV OF TECH
Preparation method of lithium battery negative electrode material iron-based binary composite metal oxide
InactiveCN105576235ALarge specific surface areaHigh specific surface areaCell electrodesSecondary cellsMicrosphereFiltration
The invention provides a preparation method of lithium battery negative electrode material iron-based binary composite metal oxide with small particle size and a mesoporous open-framework structure. The method comprises the following steps: preparing polymer microemulsion microspheres with the particle size of 50 to 500nm, and centrifuging to obtain a template material; mixing M source compounds with iron source compounds and preparing into a solution with the total concentration of metal ions of 1 to 3 mol / L; soaking the template material into the solution, and performing suction filtration to obtain a solid and drying; calcining the solid subjected to drying; cooling to obtain black powder, namely MFe2O4. The preparation method of the lithium battery negative electrode material iron-based binary composite metal oxide is simple in process, the reaction conditions are easy to control, the prepared MFe2O4 is uniform in quality, good in appearance, few in defects, and good in lithium storage performance, the particle diameter is 20 to 30nm, and the mesoporous open-framework structure is obtained.
Owner:WUHU ETC BATTERY LTD
Phosphorus-doped bronze ore phase titanium dioxide nanowire array and preparation and application thereof
InactiveCN109411740AIncrease capacityImproved magnification performanceMaterial nanotechnologySecondary cellsElectrochemistrySodium hydroxide
The invention discloses a phosphorus-doped bronze ore phase titanium dioxide nanowire array and preparation and application thereof. A specific preparation method comprises the steps: a titanium sheetis placed into a sodium hydroxide solution to be subjected to a hydrothermal reaction, then the titanium sheet is soaked in a hydrochloric acid solution, and drying is conducted after washing; and then the titanium sheet and sodium hypophosphite are placed into a tubular furnace, protective gas is introduced, thus the sodium hypophosphite and the titanium sheet are located in the upstream and thedownstream of airflow correspondingly, heating is conducted to 300-500 DEG C, heat preservation is conducted, and the phosphorus-doped bronze ore phase titanium dioxide nanowire array can be obtainedon the titanium sheet. By doping an phosphorus element into the phosphorus-doped bronze ore phase titanium dioxide nanowire array, designing the overall process of the preparation method, and improving parameter conditions of the key hydrothermal reaction and a heat treatment process, the electrochemical lithium storage capacity of the bronze ore phase titanium dioxide nanowire array is effectively enhanced, and a self-supporting lithium-ion battery anode which contains no binder and conductive agent and has the excellent electrochemical properties can be obtained.
Owner:HUAZHONG UNIV OF SCI & TECH
Preparation method of graphene/metal carbide porous micro-sphere electrode
ActiveCN106374107AEfficient compositeHigh theoretical specific capacityCell electrodesSecondary cellsLithiumCarbide
The invention discloses a preparation method of a graphene / metal carbide porous micro-sphere electrode, and relates to a preparation method of a hierarchically structured three-dimensional composite material. The invention aims to solve the problems of battery performance degradation and cycling stability influence caused by volume expansion of an existing anode material. The method comprises the following steps: firstly, preparation of oxidized graphene; secondly, preparation of a mixed solution; thirdly, drying; fourthly, annealing treatment to obtain the graphene / metal carbide porous micro-sphere electrode. The graphene / metal carbide porous micro-sphere electrode prepared in the invention as a lithium ion battery anode material has good electrochemical lithium storage performance, the capacity of a battery prepared by using the graphene / metal carbide porous micro-sphere electrode as the battery anode material under the current density of 0.1 A / g is greater than 500 mAh / g, the capacity of the battery under the current density of 3 A / g is greater than 300 mAh / g, and the capacity is hardly attenuated after 500 times of circulation. The preparation method is suitable for preparing the graphene / metal carbide porous micro-sphere electrode.
Owner:内蒙古元瓷新材料科技有限公司
Li2FeSiO4@mesoporous carbon lithium ion battery positive electrode material and preparation method thereof
ActiveCN110571431AEvenly dispersedAchieve uniformityMaterial nanotechnologySecondary cellsSolventLyonium ion
The invention provides a Li2FeSiO4@mesoporous carbon lithium ion battery positive electrode material and a preparation method thereof. The preparation method comprises the steps of 1, dissolving a certain amount of phenol, glyoxylic acid monohydrate and a surfactant into ethanol; 2, sequentially adding the raw materials according to a molar ratio of lithium to iron to silicon of 1:1:2, and stirring for dissolving; 3, transferring the obtained mixture into a culture dish, evaporating the solvent in a fume cupboard at the room temperature, and drying to obtain xerogel; and step 4, heating the xerogel to 600-800 DEG C in an inert atmosphere or a reducing atmosphere, and carrying out heat preservation for 2-4 hours. The preparation process provided by the invention is liquid phase mixing, so that the purity of Li2FeSiO4 in the obtained compound is relatively high and reaches a nanoscale, Li2FeSiO4 is uniformly dispersed in a carbon matrix, and the electrochemical performance is optimized.Due to addition of the surfactant, the obtained carbon matrix is of a mesoporous structure, so that sufficient infiltration of an electrolyte is facilitated, the contact area of an electrode and the electrolyte is increased, the diffusion and transfer of ions and electrons are accelerated, and the electrochemical lithium storage performance is facilitated to be improved.
Owner:NANJING UNIV OF TECH
Method for preparing ternary positive electrode material of high-performance lithium ion battery at low ammonia concentration
InactiveCN111807425AReduced nucleation rateEasy reunionSecondary cellsPositive electrodesElectrical batteryManganese
The invention discloses a method for preparing a ternary positive electrode material of a high-performance lithium ion battery at low ammonia concentration, and belongs to the technical field of positive electrode materials of lithium ion batteries. The method comprises the following steps: dissolving salt containing nickel, cobalt and manganese in deionized water to prepare a mixed salt solution,adding a complexing agent into the mixed salt solution, adding acid to obtain a mixed solution; continuously pumping the mixed solution and the NaOH solution into a continuous coprecipitation reaction kettle filled with bottom liquid ammonia water respectively, enabling the total ammonia concentration of the reaction kettle to be the same as the concentration of the bottom liquid ammonia water inthe reaction process, continuously reacting to obtain a precursor material, grinding and mixing the precursor material and LiOH.H2O, and sintering to obtain the lithiated ternary material. The prepared NCM622 material is good in morphology, complete in crystal structure and uniform in element distribution, the material has high discharge capacity, good cycling stability and rate capability, and atotal battery matched with graphite and a Si / C negative electrode also has good electrochemical performance.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Composite electrode material and preparation method thereof
InactiveCN107768649AEasy to synthesizeEasy to operateMaterial nanotechnologySecondary cellsNickel sulfideSolvent
The invention discloses a graphene / nickel sulfide nano composite electrode material and a preparation method thereof. With graphene oxide as a carrier, nickel acetate providing a nickel source and carbon disulfide providing a sulfur source, the electrode material is prepared under the crosslinking effect of the graphene; the nano composite material comprises a graphene nanosheet and a nickel sulfide flower-like submicrostructure component in a weight ratio of (5 to 35%):(95 to 65%). In the invention, the graphene / nickel sulfide nano composite material is prepared from the raw materials graphene oxide, nickel acetate and carbon disulfide, by a one-pot solvothermal process in an organic solvent; the nano composite material has good electrochemical lithium storage property and can be used asa cathode material of a lithium ion battery.
Owner:渭南高新区金石为开咨询有限公司
Solvothermal assisted preparation method of LiFePO4/C multistage composite microspheres
InactiveCN106654264ARealize large-scale commercial productionExcellent electrochemical lithium storage performanceCell electrodesSolventElectrochemical energy storage
The invention discloses a solvothermal assisted preparation method of LiFePO4 / C multistage composite microspheres and belongs to the technical field of electrochemical energy storage materials. The method is characterized by taking tervalent Fe3<+> as an iron source, carrying out in-situ synthesis of resorcinol-formaldehyde resin (RF) surface modified LiFePO4OH multistage composite microspheres LiFePO4OH / RF through a one-step mixed solvothermal method; and further converting the composite microspheres into LiFePO4 / C multistage composite microspheres through high-temperature carbon thermal reduction treatment under the protective atmosphere. The compaction density of LiFePO4 / C reaches up to 1.3g / cm<3>; meanwhile, nanoscale primary particles ensure sufficient electrode / electrolyte active contact area, so that the material shows excellent electrochemical lithium storage performance and has a potential application prospect in the field of high-energy / power lithium ion batteries; the preparation process is free of additional introduction of carbon source or treatment of grinding and mixing; the method is an economical, efficient and environment-friendly synthesis method; the large-scale commercial production is expected to be achieved.
Owner:JILIN UNIV
Bifunctional material SnSe1-xSx and preparation method thereof
ActiveCN113394396ASynthesis temperature is lowEasy to operateThermoelectric device manufacture/treatmentCell electrodesFreeze-dryingArgon atmosphere
The invention relates to a preparation method of a bifunctional material SnSe1-xSx, which comprises the following steps: sufficiently reacting SnCl2. 2H2O and NaOH in deionized water according to a molar ratio of 1:10, and stirring in an argon atmosphere to obtain a solution A; preparing a solution B according to the molar ratio of Se to NaBH4 of 1:2.6 in advance; dissolving a certain amount of Na2S.9H2O in a certain amount of water to obtain a solution C; mixing B and C, injecting into the solution A, keeping the stirring speed, and reacting at the boiling temperature; and after the reaction is stopped and cooled, centrifugally collecting, and drying on a freeze dryer to obtain the SnSe1-xSx bifunctional material. The controllable preparation of the nanoscale SnSe1-xSx material is realized, and the electrochemical and thermoelectric properties of the material are optimized at the same time.
Owner:CHONGQING UNIV
CuCo-BDC ultrathin nanosheet, preparation method and application thereof
PendingCN113644260AMaintain consistencyImprove performanceMaterial nanotechnologySecondary cellsElectrical batteryTerephthalic acid
The invention discloses a CuCo-BDC ultrathin nanosheet, a preparation method and application thereof. The preparation method comprises the following steps: dissolving copper chloride dihydrate, cobalt chloride hexahydrate and terephthalic acid in a mixed solution of N, N-dimethylformamide, ethanol and deionized water in an ultrasonic manner; and stirring the solution obtained in the previous step, adding triethylamine in a stirring state, then putting the solution into an ultrasonic machine for ultrasonic treatment, then centrifuging, cleaning the product obtained after centrifuging with ethanol multiple times, and drying to obtain Cu / Co-BDC powder, namely the CuCo-BDC ultrathin nanosheet. According to the invention, the Cu / Co-BDC ultrathin nanosheet with the optimal performance is obtained by regulating and controlling the proportion of metal elements, and then the Cu / Co-BDC ultrathin nanosheet is directly used as a lithium ion battery negative electrode material, wherein the average discharge potential of the material is improved by doping Cu<2+> ions, the Cu<2+> ions and Co<2+> form a bimetal organic framework, and the electrochemical lithium storage performance of the material is further improved through the coordination effect of bimetal ions.
Owner:HEFEI UNIV OF TECH
Method for preparing silicon-carbon composite material by molten salt assisted magnesiothermic reduction
ActiveCN112436131AExcellent electrochemical lithium storage performanceReduce generationMaterial nanotechnologySecondary cellsCarbon coatingLithium electrode
The invention provides a method for preparing a silicon-carbon composite material by molten salt assisted magnesiothermic reduction, and the method comprises the following steps: by using alginate andattapulgite as raw materials, carrying out high-temperature carbonization to obtain an amorphous carbon coating coated attapulgite composite material, adding a reducing agent and molten salt, carrying out heat assisted reduction reaction, and carrying out acid washing treatment to obtain the silicon-carbon composite material. According to the method for preparing the silicon-carbon composite material by combining high-temperature carbonization and low-temperature molten salt heat assistance, the generation of silicon carbide is effectively reduced through molten salt heat-assisted reduction reaction, silicon nanoparticles reduced by attapulgite are coated with a carbon coating in the prepared silicon-carbon composite material, and a gap structure is formed through acid etching. The composite material is used as a lithium ion battery negative electrode material, the volume expansion effect caused in the lithium intercalation and deintercalation process can be effectively relieved through a carbon layer, gaps and a porous structure, and meanwhile, the electronic conductivity is improved, so that the composite material has excellent electrochemical lithium storage performance.
Owner:NORTHWEST NORMAL UNIVERSITY
Positive electrode material, preparation method thereof and lithium ion battery
PendingCN114447334AImprove ionic conductivityImprove surface stabilityPositive electrodesSecondary cells servicing/maintenanceElectrolytic agentPhysical chemistry
The invention relates to the field of lithium ion batteries, and provides a positive electrode material, a preparation method thereof and a lithium ion battery, the positive electrode material comprises an active substance and a coating layer, the chemical general formula of the active substance is LiaNixCoyMnzO2, a is more than or equal to 1.0 and less than 1.1, x is more than or equal to 0.80 and less than 1, y is more than 0 and less than 0.20, z is more than 0 and less than 0.10, the coating layer is formed on at least part of the surface of the active substance, and the coating layer comprises at least two of Li3N, LiCl and Li9N2Cl3. The active substance of the positive electrode material provided by the invention has high capacity and excellent charge-discharge reversibility, and the cycle performance of the positive electrode material under a high-temperature condition is improved. And the coating layer is formed on the surface of the active substance, so that the reaction of the active substance and the electrolyte for generating gas can be reduced, and the thermal stability of the active substance in the circulation process can be improved.
Owner:SHENZHEN CITY BATTERY NANOMETER TECH
Graphene modified-carbon coated lithium iron phosphate material, preparation method thereof and solid-state lithium ion battery
PendingCN114497556AImprove controllabilityAvoid impurities and defectsMaterial nanotechnologyCell electrodesMuffle furnaceCarbon source
The invention relates to the field of lithium batteries, and discloses a graphene modified-carbon coated lithium iron phosphate material and a preparation method thereof, and a solid lithium ion battery, the preparation method comprises the following steps: dissolving a phosphate radical raw material, an iron salt and a lithium source in an alcoholic solution, then adding a template agent, a carbon source and an antioxidant, then adding graphene oxide, and carrying out ultrasonic dispersion, so as to obtain the graphene modified-carbon coated lithium iron phosphate material. Pouring into a reaction kettle, and carrying out hydrothermal synthesis to obtain a solid-phase material; and placing the solid-phase material in a vacuum oven for drying, and then placing the dried solid-phase material in a muffle furnace for high-temperature calcination to obtain the graphene modified-carbon coated lithium iron phosphate material. When the G / LFP / C material is applied to a solid-state battery, the transportation of electrons and lithium ions can be facilitated, and the interface impedance is reduced, so that the solid-state battery prepared from the G / LFP / C material can have excellent rate capability, electrochemical lithium storage performance and cycle performance.
Owner:GUANGDONG MIC POWER NEW ENERGY CO LTD
Preparation method of SnS2 nanoplate anode material of a lithium-ion battery
InactiveCN101609887BImprove cycle stabilityHigh electrochemical lithium storage capacityElectrode manufacturing processesElectrochemistryLithium-ion battery
The invention discloses a preparation method of SnS2 nanoplate anode material of a lithium-ion battery, comprising the following steps: dissolving L-cysteine in deionized water, then adding stannic chloride and fully stirring the solution to dissolve the stannic chloride; transferring the mixed solution in a reaction kettle with a polytetrafluoroethylene tank to react hydrothermal reaction at 180-220 DEG C for 8-12h, then cooling to the room temperature, centrifugalizing the products to obtain precipitate, cleaning and drying the precipitate fully to obtain the SnS2 nanoplate anode material of a lithium-ion battery; wherein, the molar ratio of L-cysteine to stannic chloride is 4:1-8:1. The SnS2 nanoplate anode material of a lithium-ion battery prepared by the method of the invention has high electrochemical capacity and good cyclic stability.
Owner:ZHEJIANG UNIV
Preparation method of nano germanium/three-dimensional porous graphene composite material and application of nano germanium/three-dimensional porous graphene composite material to negative electrode of lithium ion battery
ActiveCN114195132AExcellent electrochemical lithium storage performanceImprove lithium storage performanceMaterial nanotechnologyGraphenePorous grapheneCationic polyelectrolytes
The invention belongs to the technical field of preparation of nano composite materials, and relates to a preparation method of a nano germanium / three-dimensional porous graphene composite material. The preparation method comprises the following steps: preparing a graphene oxide dispersion liquid; then preparing a cationic polyelectrolyte modified polystyrene microsphere dispersion liquid; slowly adding polyvinylpyrrolidone and germanium dioxide into a sodium hydroxide solution, then adding the mixed solution into a cationic polyelectrolyte modified polystyrene microsphere dispersion liquid, then adding a graphene oxide dispersion liquid, adjusting the pH value with hydrochloric acid, dropwise adding into a sodium borohydride solution, precipitating and centrifuging, and drying to obtain the cationic polyelectrolyte modified polystyrene microspheres. And heating in inert / reducing mixed gas at 600-800 DEG C for 4-8 hours to obtain the catalyst. The nano germanium / three-dimensional porous graphene composite material is prepared by combining template-assisted thermal reduction with a freeze-drying method, the operation process is simple and easy to implement, the reaction time is short, the method is environmentally friendly and safe, the cost is low, and industrial implementation is easy. The prepared composite material has excellent lithium storage performance and is expected to be used as a negative electrode material of a lithium ion battery.
Owner:JIANGSU UNIV
a lifepo 4 Solvothermal Assisted Preparation of @c/rgo Hierarchical Composite Microspheres
ActiveCN106784724BEconomical synthesis methodEfficient synthesis methodMaterial nanotechnologyCell electrodesElectrolytic agentHigh energy
Owner:JILIN UNIV
Carbon assembled zinc sulfide hollow nanopolyhedral honeycomb material and its preparation and application
ActiveCN112366312BImprove conductivityImprove structural stabilityMaterial nanotechnologyCell electrodesPyrrolidinonesHoneycomb like
The invention discloses a carbon-assembled zinc sulfide hollow nano-polyhedron honeycomb material. The zinc sulfide hollow nano-polyhedron is assembled into a three-dimensional honeycomb structure through carbon, and the carbon is amorphous carbon formed by carbonization of polyvinylpyrrolidone. The invention also discloses a method for preparing the carbon-assembled zinc sulfide hollow nano-polyhedral honeycomb material. First, the zinc MOF material ZIF-8 is synthesized, and then ZIF-8 is densely assembled with polyvinylpyrrolidone, and then through one-step gas phase vulcanization and carbonization method to obtain the final product. The invention can improve the electrical conductivity, structural stability and cycle stability of the zinc sulfide, so that the zinc sulfide has high specific capacity and stable cycle performance. Carbon-assembled zinc sulfide hollow nanopolyhedral honeycomb materials have important application value as anode materials for lithium-ion batteries.
Owner:HANGZHOU VOCATIONAL & TECHN COLLEGE
Irreversible bond connected thin-layer covalent organic framework material as well as preparation method and application thereof
ActiveCN112920405AGood chemical stabilityGood electrochemical lithium storage capacityCell electrodesSecondary cellsFluoroboric acidBoronic acid
The invention relates to an irreversible bond connected thin-layer covalent organic framework material as well as a preparation method and application thereof, and belongs to the technical field of organic chemistry. The structural formula of the material shown in the specification. According to the preparation method, 2,3,6,7,10,11-hexabromo-triphenylene, 2,3,6,7,10,11-hexa-amino triphenylene hexachloride, alkali, bis(1,5-cyclo-octadiene) rhodium (I) tetrafluoroborate and N,N'-(isopropyl)imidazole chloride are taken as raw materials, and the framework material is prepared from the raw materials in an organic solvent. All atoms in the thin-layer covalent organic framework material are connected through an irreversible piperazine ring, the thin-layer covalent organic framework material is a crystalline thin-layer COFs nano sheet formed by orderly stacking single-layer COFs, and the thin-layer covalent organic framework material not only has excellent chemical stability, but also has good electrochemical lithium storage capacity and excellent cycle stability. The method provided by the invention can realize one-step synthesis of the covalent organic framework material with crystalline and thin-layer characteristics, and is simple in process, low in equipment requirement and suitable for industrial production.
Owner:CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
Preparation process of a flexible electrode with long cycle life and high specific capacity
ActiveCN109830649BLarge specific surface areaMany active sitesMaterial nanotechnologyElectrode carriers/collectorsManganese(II) carbonateCarbon nanotube
The invention relates to a preparation process of a flexible electrode with long cycle life and high specific capacity, which comprises the following steps: (1) acid treatment of multi-walled carbon nanotubes; (2) preparation of the electrode: manganese source and The treated multi-walled carbon nanotubes are mixed and dispersed in the solution according to a predetermined ratio, and the manganese ions in the manganese source are adsorbed on the multi-walled carbon nanotubes through electrostatic interaction at a predetermined temperature, and then carbonate solution is added for a predetermined time of reaction Generate manganese carbonate anchored on the multi-walled carbon nanotubes, and then perform vacuum filtration and drying to form a flexible film. Finally, the flexible film is reacted at a predetermined temperature and an inert gas atmosphere for a predetermined time to decompose the manganese carbonate to form manganese oxide. The preparation method of the present invention is simple and easy, the raw materials used are low in price, and the prepared product has good flexibility and high active material content, and when used as a flexible negative electrode of a lithium battery, it exhibits long cycle life and high specific capacity.
Owner:XIANGTAN UNIV
a nano v 2 o 5 preparation method
ActiveCN107827155BEvenly dispersedUniform particle size distributionMaterial nanotechnologyCell electrodesActive agentSurface-active agents
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
Carbon-assembled copper sulfide hollow nanocube honeycomb material and its preparation and application
ActiveCN112366311BImprove conductivityImprove structural stabilityMaterial nanotechnologyCell electrodesEtchingPyrrolidinones
Owner:HANGZHOU VOCATIONAL & TECHN COLLEGE
A kind of preparation method and application of amorphous metal oxide induced nico-btc nanosheet
ActiveCN111961217BDiffusion fastExcellent electrochemical lithium storage performanceNegative electrodesSecondary cellsPhysical chemistryElectrochemistry
The invention discloses a method for preparing NiCo-BTC nanosheets induced by amorphous metal oxides and its application. Cobalt nitrate, nickel nitrate, sodium borohydride, etc. are used as raw materials to prepare amorphous metal oxide nanosheet powder (NiCo BTC ‑ONs), and then dispersed in N, N‑dimethylformamide, and adding a mixed solution of trimesic acid and N, N‑dimethylformamide, through centrifugation, ethanol washing, drying and other steps, and finally Metal-organic framework (MOF) NiCo‑BTC nanosheet powder was prepared. The invention relates to a method for preparing metal-organic framework NiCo-BTC nanosheets. The prepared metal-organic framework nanosheets can be directly used as negative electrode materials for high-performance lithium-ion batteries. The preparation method is mild, safe and pollution-free, and simple and easy to operate. The cost is low, which is conducive to further improving the electrochemical lithium storage performance of the material.
Owner:HEFEI UNIV OF TECH
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