CN104282905A - Core-shell multi-dimensional network type lithium vanadium phosphate material and preparation method thereof - Google Patents
Core-shell multi-dimensional network type lithium vanadium phosphate material and preparation method thereof Download PDFInfo
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- CN104282905A CN104282905A CN201410470154.7A CN201410470154A CN104282905A CN 104282905 A CN104282905 A CN 104282905A CN 201410470154 A CN201410470154 A CN 201410470154A CN 104282905 A CN104282905 A CN 104282905A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a core-shell multi-dimensional network type lithium vanadium phosphate material. A lithium source, a phosphorous source, a vanadium source, graphene and organic matters with complexing action are reacted to prepare a precursor of a lithium vanadium phosphate complex, which is loaded on a graphene sheet, and then the precursor is sintered in an inert atmosphere at 300-900 DEG C in fragments to obtain the core-shell multi-dimensional network type lithium vanadium phosphate material. According to the core-shell multi-dimensional network type lithium vanadium phosphate material, the surfaces of nano lithium vanadium phosphate particles are coated with amorphous carbon formed by carbonizing the organic matters with complexing action so as to form a uniform nanometer core-shell structure.
Description
Technical field
The present invention relates to a kind of anode material for lithium-ion batteries and preparation method thereof, particularly relate to a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material and preparation method thereof.
Background technology
Polyanionic positive electrode, due to its stable structure, relatively high operating voltage, relatively large theoretical capacity, advantages of environment protection, causes large quantity research.In various polyanionic positive electrode, Li
3v
2(PO
4)
3have higher discharge voltage plateau, average discharge volt is 4.0; They are in 3.0 – 4.3V voltage ranges, and theoretical capacity is 133mAh/g, and in 3.0 – 4.8V voltage ranges, theoretical capacity is 197mAh/g, are a kind of very promising Olivine-type Cathode Material in Li-ion Batteries.
Synthesis lithium vanadium phosphate material mainly contains solid phase method and liquid phase method.The materials chemistry that liquid phase method obtains measures than good, epigranular, purity is high, chemical property good.Sol-gal process can reach the mixing of reactant atomic level, and each metallic element is uniformly distributed, and is one of the most frequently used liquid phase method.
Although Li
3v
2(PO
4)
3there is good chemical property, but its intrinsic conductivity is low, has a strong impact on its high rate performance, limits its practical application.
Summary of the invention
The object of this invention is to provide that a kind of stoichiometric proportion is good, purity is high, the nucleocapsid multidimensional network type lithium vanadium phosphate material of circulation and good rate capability;
Another object of the present invention is to provide that a kind of stoichiometric proportion is good, purity is high, the preparation method of the nucleocapsid multidimensional network type lithium vanadium phosphate material of circulation and good rate capability.
For achieving the above object, the technical solution used in the present invention is: a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material, it is characterized in that: by lithium source, phosphorus source, vanadium source, Graphene and the organic substance reaction with complexing, be prepared into the presoma of the phosphoric acid vanadium lithium complex compound loaded on graphene film, then by this presoma in inert atmosphere 300-900
oafter C multi-steps sintering, obtain nucleocapsid multidimensional network type lithium vanadium phosphate material.
In this material, described nucleocapsid multidimensional network type lithium vanadium phosphate material refers to, at nanometer phosphoric acid alum lithium particle surface, be coated with the agraphitic carbon after the organic carbon of complexing, and the two forms a kind of uniform nano-core-shell structure.
In this material, described multidimensional network type lithium vanadium phosphate material nucleocapsid multidimensional network structure refers to that nano-core-shell structure loads on graphene film, a kind of nucleocapsid multidimensional network structure of formation.
A kind of preparation method of nucleocapsid multidimensional network type lithium vanadium phosphate material:
(1) precursor power, the i.e. compound that forms of Graphene and phosphoric acid vanadium lithium complex compound;
Accurately take lithium source, phosphorus source and vanadium source according to the stoichiometric proportion of lithium, phosphoric acid, alum in lithium vanadium phosphate material, in deionized water, magnetic agitation is dissolved, and obtains the mixed solution A of 1 – 5mol/L; According to slaine integral molar quantity: there is the organic substance of complexing mole=1:0.5 – 1.5 to take organic substance, and with graphene dispersion in deionized water, obtain complexing agent-Graphene suspension-turbid liquid B; By above-mentioned solution A 50 – 90 in constant-temperature heating magnetic stirring apparatus
oc is incubated, then pours B into A, and adjust ph, in the scope of 1 – 9, through colloidal sol, ageing, gel, dry run, obtains nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma;
(2) preparation of nucleocapsid multidimensional network type lithium vanadium phosphate material;
By the presoma obtained in (1), multi-steps sintering in inert atmosphere pipe type stove, prior to 300 – 500
oc presintering 3 – 6h, then at 750 – 900
oc roasting 12 – 24h, after cooling, grinding is sieved, and obtains nucleocapsid multidimensional network type lithium vanadium phosphate material.
In the method, the lithium source in step (1) is one or more in lithia, lithium acetate, lithium nitrate, lithium hydroxide; Vanadium source is one or several in vanadium trioxide, ammonium metavanadate, ammonium vanadate, vanadyl oxalate; Phosphorus source is one or more in ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, pyrophosphoric acid.
In the method, the organic substance of complexing that has in step (1) is one or several in citric acid, polyvinyl alcohol, acid polyethylene, polyethylene glycol, polyvinylpyrrolidone.
In the method, the Graphene quality added in step (1) is 0.1 – 2% of reactant gross mass.
In the method, according to the stoichiometric proportion of lithium, phosphorus, each element of vanadium in target product, take lithium acetate, ammonium dihydrogen phosphate, vanadium trioxide respectively, be dissolved in deionized water, 80
oheated at constant temperature magnetic agitation under C, obtains even salt mixed liquor; Be that complexing agent adds deionized water together with Graphene with polyvinyl alcohol, carry out magnetic agitation dispersion, be made into uniform polyvinyl alcohol-Graphene suspension-turbid liquid, suspension-turbid liquid is added in salt mixed liquor with certain speed, and regulate pH to be 5, constant temperature 80
oc stirs, and experience colloidal sol, ageing, gel, dry run, obtain nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma, and this presoma is elder generation 350 in tube furnace nitrogen atmosphere
oc predecomposition 5h, then 800
oc roasting 12h, grinding is sieved and is obtained the nucleocapsid multidimensional network type lithium vanadium phosphate material that particle diameter is 30 – 50nm.
Advantageous effect of the present invention is: due to this nucleocapsid Multi net voting type lithium vanadium phosphate material of the present invention's synthesis, namely the phosphoric acid vanadium lithium of nanometer is by agraphitic carbon in-stiu coating, form the nucleocapsid structure of nanometer, this structural load is on the graphene film having afflux effect, the feature that stoichiometric proportion is good so the material of this special construction not only has, purity is high, also because of carbon in-stiu coating after Graphene and organic substance high temperature cabonization, both common modifications, form the multidimensional network material of nucleocapsid structure, make the good conductivity of material, circulation and high rate performance excellent.
Accompanying drawing explanation
Fig. 1 is the SEM figure of nucleocapsid multidimensional network type lithium vanadium phosphate material local in embodiment 1;
Fig. 2 is the TEM figure of nucleocapsid multidimensional network type lithium vanadium phosphate material local in embodiment 2;
Fig. 3 is nucleocapsid multidimensional network type lithium vanadium phosphate material in embodiment 3, in 3.0 – 4.3V scopes, and the first charge-discharge figure under 0.1C;
Fig. 4 is nucleocapsid multidimensional network type lithium vanadium phosphate material in embodiment 1, charge and discharge electrograph under different multiplying within the scope of 3.0 – 4.3V.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
The present invention as shown in Figure 1,2,3, 4, a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material, it is characterized in that: by lithium source, phosphorus source, vanadium source, Graphene and the organic substance reaction with complexing, be prepared into the presoma of the phosphoric acid vanadium lithium complex compound loaded on graphene film, then by this presoma in inert atmosphere 300-900
oafter C multi-steps sintering, obtain nucleocapsid multidimensional network type lithium vanadium phosphate material.In the present embodiment, described nucleocapsid multidimensional network type lithium vanadium phosphate material refers to, at nanometer phosphoric acid alum lithium particle surface, be coated with the agraphitic carbon after the organic carbon of complexing, and the two forms a kind of uniform nano-core-shell structure.In the present embodiment, described multidimensional network type lithium vanadium phosphate material nucleocapsid multidimensional network structure refers to that nano-core-shell structure loads on graphene film, a kind of nucleocapsid multidimensional network structure of formation.
The preparation method of nucleocapsid multidimensional network type lithium vanadium phosphate material: (1) precursor power, the i.e. compound that forms of Graphene and phosphoric acid vanadium lithium complex compound; Accurately take lithium source, phosphorus source and vanadium source according to the stoichiometric proportion of lithium, phosphoric acid, alum in lithium vanadium phosphate material, in deionized water, magnetic agitation is dissolved, and obtains the mixed solution A of 1 – 5mol/L; According to slaine integral molar quantity: there is the organic substance of complexing mole=1:0.5 – 1.5 to take organic substance, and with graphene dispersion in deionized water, obtain complexing agent-Graphene suspension-turbid liquid B; By above-mentioned solution A 50 – 90 in constant-temperature heating magnetic stirring apparatus
oc is incubated, then pours B into A, and adjust ph, in the scope of 1 – 9, through colloidal sol, ageing, gel, dry run, obtains nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma; (2) preparation of nucleocapsid multidimensional network type lithium vanadium phosphate material; By the presoma obtained in (1), multi-steps sintering in inert atmosphere pipe type stove, prior to 300 – 500
oc presintering 3 – 6h, then at 750 – 900
oc roasting 12 – 24h, after cooling, grinding is sieved, and obtains nucleocapsid multidimensional network type lithium vanadium phosphate material.In the present embodiment, the lithium source in step (1) is one or more in lithia, lithium acetate, lithium nitrate, lithium hydroxide; Vanadium source is one or several in vanadium trioxide, ammonium metavanadate, ammonium vanadate, vanadyl oxalate; Phosphorus source is one or more in ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, pyrophosphoric acid.In the present embodiment, the organic substance of complexing that has in step (1) is one or several in citric acid, polyvinyl alcohol, acid polyethylene, polyethylene glycol, polyvinylpyrrolidone.In the present embodiment, the Graphene quality added in step (1) is 0.1 – 2% of reactant gross mass.In the present embodiment, according to the stoichiometric proportion of lithium, phosphorus, each element of vanadium in target product, take lithium acetate, ammonium dihydrogen phosphate, vanadium trioxide respectively, be dissolved in deionized water, 80
oheated at constant temperature magnetic agitation under C, obtains even salt mixed liquor; Be that complexing agent adds deionized water together with Graphene with polyvinyl alcohol, carry out magnetic agitation dispersion, be made into uniform polyvinyl alcohol-Graphene suspension-turbid liquid, suspension-turbid liquid is added in salt mixed liquor with certain speed, and regulate pH to be 5, constant temperature 80
oc stirs, and experience colloidal sol, ageing, gel, dry run, obtain nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma, and this presoma is elder generation 350 in tube furnace nitrogen atmosphere
oc predecomposition 5h, then 800
oc roasting 12h, grinding is sieved and is obtained the nucleocapsid multidimensional network type lithium vanadium phosphate material that particle diameter is 30 – 50nm.
Embodiment 1
According to the stoichiometric proportion of lithium, phosphorus, each element of vanadium in target product, take lithium acetate, ammonium dihydrogen phosphate, vanadium trioxide respectively, be dissolved in deionized water, 80
oheated at constant temperature magnetic agitation under C, obtains even salt mixed liquor; Be that complexing agent adds a certain amount of deionized water together with Graphene with polyvinyl alcohol, carry out magnetic agitation dispersion, be made into uniform polyvinyl alcohol-Graphene suspension-turbid liquid.Suspension-turbid liquid is added in salt mixed liquor with certain speed, and regulates pH to be 5, constant temperature 80
oc stirs, and experience colloidal sol, ageing, gel, dry run, obtain nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma, and this presoma is elder generation 350 in tube furnace nitrogen atmosphere
oc predecomposition 5h, then 800
oc roasting 12h, grinding is sieved and is obtained the nucleocapsid multidimensional network type lithium vanadium phosphate material that particle diameter is 30-50nm.
With the nucleocapsid multidimensional network type lithium vanadium phosphate material of preparation for active material, make electrode slice with conductive agent (acetylene black), binding agent (Kynoar, PVDF), metal lithium sheet is to electrode and reference electrode, assembling half-cell.In 25
oin C environment, in the voltage range of 3.0 – 4.3V, under 0.1C multiplying power, (1C=133mA/g) carries out charge-discharge test.
Fig. 1 is the SEM figure of the nucleocapsid multidimensional network type lithium vanadium phosphate material local that example 1 obtains, and as shown in the figure, the material obtained is a kind of multidimensional net of area load thing.
Fig. 4 is the nucleocapsid multidimensional network type lithium vanadium phosphate material that example 1 obtains, and within the scope of 3.0 – 4.3V, charge and discharge electrograph under different multiplying, can see that this material has good multiplying power and cycle performance.
Embodiment 2
Lithium source in embodiment 1 is changed and is done lithium hydroxide, and complexing agent changes and does citric acid, and pH value is adjusted to 8, and other conditions are constant, 400 after obtained presoma
oc predecomposition 3h, then 750
oc roasting 18h, grinding is sieved and is obtained nanoscale nucleocapsid multidimensional network type lithium vanadium phosphate material, records this material property still better.
Fig. 2 is the TEM figure of the nucleocapsid multidimensional network type lithium vanadium phosphate material local that example 2 obtains, and can see the particle above graphene film and load significantly.
Embodiment 3
Vanadium source in embodiment 1 is changed and is done ammonium metavanadate, and complexing agent changes and does citric acid, and pH value is adjusted to 8, and 70
oc is incubated, and other conditions are constant, 400 after obtained presoma
oc predecomposition 3h, then 800
oc roasting 15h, grinding is sieved and is obtained nanoscale nucleocapsid multidimensional network type lithium vanadium phosphate material, records this material property still better.
Fig. 3 is the nucleocapsid multidimensional network type lithium vanadium phosphate material that example 3 obtains, in 3.0 – 4.3V scopes, and the first charge-discharge figure under 0.1C.
Claims (8)
1. a nucleocapsid multidimensional network type lithium vanadium phosphate material, it is characterized in that: by lithium source, phosphorus source, vanadium source, Graphene and the organic substance reaction with complexing, be prepared into the presoma of the phosphoric acid vanadium lithium complex compound loaded on graphene film, then by this presoma in inert atmosphere 300-900
oafter C multi-steps sintering, obtain nucleocapsid multidimensional network type lithium vanadium phosphate material.
2. a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 1, it is characterized in that: described nucleocapsid multidimensional network type lithium vanadium phosphate material refers at nanometer phosphoric acid alum lithium particle surface, be coated with the agraphitic carbon after the organic carbon of complexing, the two forms a kind of uniform nano-core-shell structure.
3. a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 2, it is characterized in that: described multidimensional network type lithium vanadium phosphate material nucleocapsid multidimensional network structure refers to that nano-core-shell structure loads on graphene film, a kind of nucleocapsid multidimensional network structure of formation.
4. the preparation method of a nucleocapsid multidimensional network type lithium vanadium phosphate material:
(1) precursor power, the i.e. compound that forms of Graphene and phosphoric acid vanadium lithium complex compound;
Accurately take lithium source, phosphorus source and vanadium source according to the stoichiometric proportion of lithium, phosphoric acid, alum in lithium vanadium phosphate material, in deionized water, magnetic agitation is dissolved, and obtains the mixed solution A of 1 – 5mol/L; According to slaine integral molar quantity: there is the organic substance of complexing mole=1:0.5 – 1.5 to take organic substance, and with graphene dispersion in deionized water, obtain complexing agent-Graphene suspension-turbid liquid B; By above-mentioned solution A 50 – 90 in constant-temperature heating magnetic stirring apparatus
oc is incubated, then pours B into A, and adjust ph, in the scope of 1 – 9, through colloidal sol, ageing, gel, dry run, obtains nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma;
(2) preparation of nucleocapsid multidimensional network type lithium vanadium phosphate material;
By the presoma obtained in (1), multi-steps sintering in inert atmosphere pipe type stove, prior to 300 – 500
oc presintering 3 – 6h, then at 750 – 900
oc roasting 12 – 24h, after cooling, grinding is sieved, and obtains nucleocapsid multidimensional network type lithium vanadium phosphate material.
5. the preparation method of a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 4, is characterized in that: the lithium source in step (1) is one or more in lithia, lithium acetate, lithium nitrate, lithium hydroxide; Vanadium source is one or several in vanadium trioxide, ammonium metavanadate, ammonium vanadate, vanadyl oxalate; Phosphorus source is one or more in ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, pyrophosphoric acid.
6. the preparation method of described a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 5, is characterized in that: the organic substance of complexing that has in step (1) is one or several in citric acid, polyvinyl alcohol, acid polyethylene, polyethylene glycol, polyvinylpyrrolidone.
7. the preparation method of described a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 6, is characterized in that: the Graphene quality added in step (1) is 0.1 – 2% of reactant gross mass.
8. the preparation method of described a kind of nucleocapsid multidimensional network type lithium vanadium phosphate material according to claim 7, it is characterized in that: according to the stoichiometric proportion of lithium, phosphorus, each element of vanadium in target product, take lithium acetate, ammonium dihydrogen phosphate, vanadium trioxide respectively, be dissolved in deionized water, 80
oheated at constant temperature magnetic agitation under C, obtains even salt mixed liquor; Be that complexing agent adds deionized water together with Graphene with polyvinyl alcohol, carry out magnetic agitation dispersion, be made into uniform polyvinyl alcohol-Graphene suspension-turbid liquid, suspension-turbid liquid is added in salt mixed liquor with certain speed, and regulate pH to be 5, constant temperature 80
oc stirs, and experience colloidal sol, ageing, gel, dry run, obtain nucleocapsid multidimensional network type phosphoric acid vanadium lithium presoma, and this presoma is elder generation 350 in tube furnace nitrogen atmosphere
oc predecomposition 5h, then 800
oc roasting 12h, grinding is sieved and is obtained the nucleocapsid multidimensional network type lithium vanadium phosphate material that particle diameter is 30 – 50nm.
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Cited By (4)
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|---|---|---|---|---|
| CN105118994A (en) * | 2015-08-26 | 2015-12-02 | 武汉理工大学 | Positive electrode lithium vanadium phosphate composite material of lithium ion battery and preparation method for positive electrode lithium vanadium phosphate composite material |
| CN107369827A (en) * | 2017-08-09 | 2017-11-21 | 湖南工业大学 | A kind of preparation method of phosphoric acid vanadium lithium/carbon composite anode material of flower-like structure |
| CN109346701A (en) * | 2018-10-26 | 2019-02-15 | 中南大学 | A kind of vanadium phosphate sodium/multifunctional C composite material and preparation method and the application as electrode material |
| CN111883747A (en) * | 2020-06-24 | 2020-11-03 | 华南理工大学 | Method for preparing porous graphene coated lithium vanadium phosphate by recovering graphite cathode material from waste power battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118994A (en) * | 2015-08-26 | 2015-12-02 | 武汉理工大学 | Positive electrode lithium vanadium phosphate composite material of lithium ion battery and preparation method for positive electrode lithium vanadium phosphate composite material |
| CN107369827A (en) * | 2017-08-09 | 2017-11-21 | 湖南工业大学 | A kind of preparation method of phosphoric acid vanadium lithium/carbon composite anode material of flower-like structure |
| CN107369827B (en) * | 2017-08-09 | 2020-02-14 | 湖南工业大学 | Preparation method of lithium vanadium phosphate/carbon composite positive electrode material with flower-like structure |
| CN109346701A (en) * | 2018-10-26 | 2019-02-15 | 中南大学 | A kind of vanadium phosphate sodium/multifunctional C composite material and preparation method and the application as electrode material |
| CN111883747A (en) * | 2020-06-24 | 2020-11-03 | 华南理工大学 | Method for preparing porous graphene coated lithium vanadium phosphate by recovering graphite cathode material from waste power battery |
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Application publication date: 20150114 |