CN106684384A - Preparation method of high-power and long-service life lithium vanadium phosphate sodium/carbon positive electrode material - Google Patents
Preparation method of high-power and long-service life lithium vanadium phosphate sodium/carbon positive electrode material Download PDFInfo
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- CN106684384A CN106684384A CN201710030599.7A CN201710030599A CN106684384A CN 106684384 A CN106684384 A CN 106684384A CN 201710030599 A CN201710030599 A CN 201710030599A CN 106684384 A CN106684384 A CN 106684384A
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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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/265—General methods for obtaining phosphates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
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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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- 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
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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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 provides a preparation method of a high-power and long-service life lithium vanadium phosphate sodium/carbon positive electrode material. The method comprises the following steps of adding a lithium source, a sodium source, a vanadium source, a phosphorus source and a carbon source to deionized water as raw materials at a certain ratio, mixing evenly and carrying out spray drying on the obtained solution to obtain lithium vanadium phosphate sodium/carbon precursor powder; and carrying out microwave sintering on the obtained precursor powder to obtain the lithium vanadium phosphate sodium/carbon positive electrode material. The preparation method is simple in process, short in synthesis time, low in production cost, easy to operate and suitable for implementation of industrial production. The prepared lithium vanadium phosphate sodium/carbon positive electrode material has the characteristics of high power, long service life and the like and is suitable for a lithium-ion power battery.
Description
Technical field
The present invention relates to battery material technical field, more particularly to a kind of high power long-life vanadium phosphate sodium lithium/carbon positive pole
The preparation method of material.
Background technology
As developing rapidly for automobile industry is progressively exhausted with petroleum resources, lithium ion battery is in electrokinetic cell field
Using receiving more and more attention, but the stability and high security of electrokinetic cell require to propose lithium ion battery it is higher
Requirement.The cobalt acid lithium high cost of at present commercialization, there is certain toxicity, power current is also not reaching in terms of high temperature safety
The requirement in pond.The shortcomings of spinel lithium manganate theoretical capacity is low, charge-discharge performance is poor, capacity attenuation is fast limits its business
The development of change.LiFePO4 has the advantages that safe and environment-friendly, good stability, specific capacity height, low price, it is considered to be most
One of promising anode material for lithium-ion batteries, but have that electronic conductivity is low, lithium ion diffusion coefficient is low, high current
Flash-over characteristic is poor and the relatively low shortcoming of tap density.
In recent years, the phosphoric acid vanadium lithium of monocline has higher energy density, higher running voltage, preferably because of which
Chemical property and relatively low cost and enjoy the favor of people.But phosphoric acid vanadium lithium has lithium ion diffusion coefficient is little, electronics
The low problem of electrical conductivity, in order to solve the above problems, at present mainly by carbon coating, metal ion mixing, material nano etc.
Method is improving its electronic conductivity and lithium ion diffusion coefficient.The inventive method is mainly compound by carbon and sodium ion adulterates
To improve the electrical conductivity and ionic diffusion coefficient of phosphoric acid vanadium lithium, and then improve its chemical property.Carbon is compound can to make vanadium phosphate
Lithium granule is better contacted with, and is changed interparticle electric conductivity, and then is improved electronic conductivity, improves the chemical property of material.
Adulterate on lithium position a certain amount of sodium ion, it is possible to obtain vanadium phosphate sodium lithium, the electronic conductivity and lithium ion of its intracell
Diffusion coefficient is effectively improved, so as to lift the chemical property of material.
At present, the preparation method of vanadium phosphate sodium lithium/carbon positive electrode mainly has high temperature solid phase synthesis and sol-gel
Method.Domestic Wang De spaces et al.（Journal of Power Sources, 2013,227：199–203）And Publication No.
The Chinese patent of CN102569797B is prepared for vanadium phosphate sodium lithium/carbon positive electrode, the method behaviour using solid phase high-temperature synthesis
Make cumbersome, high energy consumption, response time are long, the problems such as production cost is high.Dai Changsong et al.（ElectrochimicaActa,
2013,103：259–265）And the Chinese patent of Publication No. CN102496716A has synthesized vanadium phosphate using sol-gel process
Sodium lithium/carbon positive electrode.Sol-gel process has that building-up process is loaded down with trivial details, and repeatability is poor, and is difficult to industrialization.
The content of the invention
In place of the deficiencies in the prior art, the purpose of the present invention is combined by spray drying and microwave sintering, is carried
For a kind of preparation method of the long-life vanadium phosphate sodium lithium/carbon positive electrode of high power.The method not only imitate by process is simple, production
Rate is high, and energy consumption is low, is adapted to large-scale production, and obtained vanadium phosphate sodium lithium/material with carbon element has excellent big multiplying power discharging
The cyclical stability that can and project.
To achieve these goals, technical scheme is as follows：
A kind of preparation method of high power long-life vanadium phosphate sodium lithium/carbon positive electrode, its step are as follows:
（1）Raw material lithium source, sodium source, vanadium source, source of phosphoric acid are pressed into 2.2 ~ 2.8:0.2~0.8:2:3 mol ratio adds deionized water
In, the carbon source that phosphorus content is 5-25wt% then being added, is heated to mixing at 50 ~ 80 DEG C, constant temperature is stirred 10 ~ 30 minutes,
Form homogeneous mixture solotion；
（2）Resulting solution is spray-dried in the case where inlet temperature is for 150 ~ 280 DEG C, vanadium phosphate sodium lithium/carbon matrix precursor is obtained
Powder；
（3）By precursor powder in an inert atmosphere sintering temperature be 600 ~ 900 DEG C, sintering time be 5 ~ 40 minutes under conditions of
Microwave sintering is carried out, vanadium phosphate sodium lithium/carbon positive electrode after cooling, is obtained.
Preferably, step（1）Described in raw material also include oxalic acid, the oxalic acid and vanadium source add simultaneously, oxalic acid and vanadium
Nonstoichiometric molar ratio is 1.5:1.
Described lithium source be Lithium hydrate, lithium carbonate, lithium nitrate, Quilonorm (SKB) or lithium oxalate in one or more.
Described sodium source is the one kind in sodium carbonate, sodium bicarbonate, sodium nitrate, sodium hydroxide, sodium citrate or Disodium oxalate.
Or it is two or more.
Described vanadium source be vanadic anhydride, ammonium metavanadate, Vanadium sesquioxide or vanadium dioxide in one or two with
On.
Phosphorus source be ammonium dihydrogen phosphate, ammonium phosphate, diammonium phosphate or phosphoric acid in one or more.
Described carbon source is citric acid, oxalic acid, tartaric acid, glucose, sucrose, starch, polyvinylpyrrolidone, fiber
One or more in element, activated carbon, CNT or Graphene.
Described mixed solution concentration is 0.005mol/L ~ 5mol/L.
Described inert atmosphere is nitrogen, argon, nitrogen/hydrogen mixed gas or argon/hydrogen mixed gas（Hydrogen content is
5~10%）.
In described positive electrode, carbon content is 5 ~ 20 wt%.
The present invention prepares vanadium phosphate sodium lithium/carbon positive electrode powder using spray drying-microwave sintering method, lithium source, sodium source,
Vanadium source and phosphorus source uniformly can be mixed on a molecular scale, and carbon can be equably combined or be wrapped with the conductive agent as material
Overlay on vanadium phosphate sodium lithium, obtained vanadium phosphate sodium lithium/material with carbon element purity is high, uniform particle sizes, under 20C multiplying powers, after 100 circulations
Capability retention is more than 95%.The inventive method process is simple, present invention process is simple, generated time is short, production cost, easily behaviour
Make, facilitate implementation industrialized production.
Description of the drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of the phosphoric acid vanadium lithium/carbon positive electrode sample prepared by embodiment 1；
Fig. 2 is the cycle performance curve chart that the phosphoric acid vanadium lithium/carbon positive electrode prepared by embodiment 1 is tested under 1C multiplying powers；
Fig. 3 is the presoma of the vanadium phosphate sodium lithium/carbon positive electrode prepared by embodiment 2（a）And sample（b）Scanning electron microscope
Figure；
Fig. 4 is the multiplying power discharging property figure of vanadium phosphate sodium lithium/carbon positive electrode prepared by embodiment 2；
Fig. 5 is the cycle performance curve chart that vanadium phosphate sodium lithium/carbon positive electrode prepared by embodiment 2 is tested under 20C multiplying powers；
Fig. 6 is the cyclic voltammetry curve figure of vanadium phosphate sodium lithium/carbon positive electrode prepared by embodiment 3；
Fig. 7 is the cycle performance curve that vanadium phosphate sodium lithium/carbon positive electrode prepared by embodiment 3 is tested under 1C and 10C multiplying powers
Figure.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.These embodiments be merely to illustrate the present invention and not
For limiting the scope of the present invention.After the content for having read instruction of the present invention, those skilled in the art make each to the present invention
Plant and change or change, these equivalent form of values equally fall within the application appended claims limited range.
Embodiment 1 prepares Li3V2(PO4)3/ C powder
It is prepared by presoma：By chemical formula Li3V2(PO4)3In/C, the nonstoichiometric molar ratio of Li, V, P weighs 1.1698g's first
The oxalic acid of ammonium metavanadate and 1.891g is dissolved in 200 mL deionized waters, after 70 DEG C of constant temperature magnetic agitation 10 minutes, then is claimed successively
The glucose of the ammonium dihydrogen phosphate of 1.7253g, the Lithium hydrate of 0.6923g and 0.6233 g is taken, and in adding the solution containing vanadium,
Constant temperature is stirred 10 minutes, forms blue mixed solution.The blue solution of gained is spray-dried on spray dryer, is obtained
To precursor powder, inlet temperature is 200 DEG C.
Microwave sintering：The microwave sintering under argon protection, sintering temperature are 700 DEG C, and sintering time is 15 minutes, cooling
Li is obtained afterwards3V2(PO4)3/ C powder.
Fig. 1 is Li3V2(PO4)3The scanning electron microscope (SEM) photograph of/C powder samples, sample are near-spherical granule, and granular size is hundreds of
Nanometer is between 4 μm.
Electrode fabrication is assembled with battery：It is 8 in mass ratio：1：1 weighs Li2.6Na0.4V2(PO4)3/ C powder, conductive black
With binding agent PVDF, appropriate -2 ketopyrrolidine of 1- methyl is subsequently adding（NMP）, be sufficiently mixed be ground to it is which is uniform after pasty state
It is coated on aluminium foil, then 120 DEG C of dryings 12 hours in vacuum drying oven, are punched into a diameter of 14 mm disks after cooling.
Assemble CR2032 button cells in the glove box full of argon, obtained electrode slice is working electrode, Celgard 2325
Microporous polypropylene membrane is barrier film, and simple metal lithium piece is negative pole, 1M LiPF6/EC+DMC+EMC (1:1:1 volume ratio) solution is
Electrolyte.
Electrochemical property test：Fig. 2 is cycle performance curve of the sample under 1C multiplying powers, and first discharge specific capacity is 96.6
MAh/g, after 100 circulations, capability retention reaches 98.7%.
Embodiment 2 prepares Li2.6Na0.4V2(PO4)3/ C powder
It is prepared by presoma：By chemical formula Li2.6Na0.4V2(PO4)3In/C, the nonstoichiometric molar ratio of Li, Na, V, P is weighed first
The oxalic acid of the ammonium metavanadate and 1.893g of 1.1698g is dissolved in 200mL deionized waters, after 70 DEG C of constant temperature magnetic agitation 10 minutes,
Weigh the Portugal of ammonium dihydrogen phosphate, the Lithium hydrate of 0.5508g, the sodium carbonate of 0.1113g and the 0.6335g of 1.7253g again successively
Grape sugar, and in adding the solution containing vanadium, constant temperature is stirred 10 minutes, forms blue mixed solution.By the blue solution of gained in spray
It is spray-dried on mist drying machine, is obtained precursor powder, inlet temperature is 200 DEG C.
Microwave sintering：The microwave sintering under argon protection, sintering temperature are 750 DEG C, and sintering time is 10 minutes, after cooling
Li is obtained2.6Na0.4V2(PO4)3/ C powder.
Fig. 3 is Li2.6Na0.4V2(PO4)3The stereoscan photograph of/C powder precursors (a) and sample (b), sample are class ball
Shape micron particle, granular size is at 3 ~ 10 μm or so.
Electrode fabrication is assembled with battery：Detailed process is shown in embodiment 1.
Electrochemical property test：The multiplying power discharging property of sample is shown in Fig. 4, and sample shows higher under different multiplying
Discharge capacity, under 0.1C multiplying powers, discharge capacity is 126.9 mAh/g, and 20C multiplying powers discharge capacity is 112.9 mAh/g.Fig. 5
The cycle performance curve for being sample under 20C multiplying powers, after 100 circulations, capability retention can reach 95%.
Embodiment 3 prepares Li2.4Na0.6V2(PO4)3/ C powder
It is prepared by presoma：By chemical formula Li2.6Na0.4V2(PO4)3In/C, the nonstoichiometric molar ratio of Li, Na, V, P is weighed first
The oxalic acid of the ammonium metavanadate and 1.895g of 1.1697g is dissolved in 200 mL deionized waters, after 60 DEG C of constant temperature magnetic agitation 20 minutes,
The Fructus Vitis viniferae of ammonium dihydrogen phosphate, the Lithium hydrate of 0.5287g, the sodium carbonate of 0.1669g and the 0.6385g of 1.7256g is weighed successively
Sugar, and in adding the solution containing vanadium, constant temperature is stirred 10 minutes, forms blue mixed solution.By the blue solution of gained in spraying
It is spray-dried on drying machine, is obtained precursor powder, inlet temperature is 250 DEG C.
Microwave sintering：The microwave sintering under argon protection, sintering temperature are 750 DEG C, and sintering time is 15 minutes, after cooling
Li is obtained2.4Na0.6V2(PO4)3/ C powder.
X-ray diffraction analysis result shows Li2.4Na0.6V2(PO4)3The degree of crystallinity of/C powder samples is good, and sample is Pedicellus et Pericarpium Trapae side
The vanadium phosphate sodium lithium of structure.
Electrode fabrication is assembled with battery：Detailed process is shown in embodiment 1.
Electrochemical property test：The cyclic voltammetry curve that sample is tested under 0.1 mV/s sweep speeds is shown in Fig. 6, and sample is only
There are a pair sharp redox peaks, voltage is near 3.8/3.7V.Sample shows stable circulation under different multiplying
Performance is shown in Fig. 7, and under 1C and 10C multiplying powers, the discharge capacity first of sample respectively reaches 118.6 mAh/g and 114.4mAh/g,
After circulation 100 times, capability retention is respectively 97.3% and 91.1%.
Claims (9)
1. a kind of preparation method of high power long-life vanadium phosphate sodium lithium/carbon positive electrode, it is characterised in that including following step
Suddenly：
（1）Raw material lithium source, sodium source, vanadium source, phosphorus source are pressed into 2.95 ~ 2:0.05~1:2:3 nonstoichiometric molar ratio adds deionization
In water, the carbon source that phosphorus content is 5-25wt% is subsequently adding, is heated to mixing at 50 ~ 80 DEG C, constant temperature is stirred 10 ~ 30 minutes,
Form homogeneous mixture solotion；
（2）Resulting solution is spray-dried in the case where inlet temperature is for 150 ~ 280 DEG C, vanadium phosphate sodium lithium/carbon matrix precursor is obtained
Powder；
（3）By precursor powder in an inert atmosphere sintering temperature be 600 ~ 900 DEG C, sintering time be 5 ~ 40 minutes under conditions of
Microwave sintering is carried out, vanadium phosphate sodium lithium/carbon positive electrode after cooling, is obtained.
2. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon according to claim 1, it is characterised in that step
（1）Described in lithium source be Lithium hydrate, lithium carbonate, lithium nitrate, Quilonorm (SKB) or lithium oxalate in one or more.
3. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon according to claim 1, it is characterised in that described
Sodium source be sodium carbonate, sodium bicarbonate, sodium nitrate, sodium hydroxide, sodium citrate or Disodium oxalate. in one or more.
4. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon according to claim 1, it is characterised in that described
Vanadium source be vanadic anhydride, ammonium metavanadate, Vanadium sesquioxide or vanadium dioxide in one or more.
5. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon according to claim 1, it is characterised in that described
Phosphorus source be ammonium dihydrogen phosphate, ammonium phosphate, diammonium phosphate or phosphoric acid in one or more.
6. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon according to claim 1, it is characterised in that described
Carbon source be that citric acid, oxalic acid, tartaric acid, glucose, sucrose, starch, polyvinylpyrrolidone, cellulose, activated carbon, carbon are received
One or more in mitron or Graphene.
7. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon positive electrode according to claim 1, its feature exist
In step（1）Described mixed solution concentration is 0.005mol/L ~ 5mol/L.
8. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon positive electrode according to claim 1, its feature exist
In step（3）Described in inert atmosphere be nitrogen, argon, nitrogen/hydrogen mixed gas or argon/hydrogen mixed gas, gaseous mixture
In, hydrogen content is 5 ~ 10%.
9. the preparation method of high power long-life vanadium phosphate sodium lithium/carbon positive electrode according to claim 1, its feature exist
In step（3）The carbon content of described positive electrode is 3 ~ 20 wt%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113104828A (en) * | 2021-03-19 | 2021-07-13 | 三峡大学 | Preparation method of porous carbon modified sodium iron pyrophosphate phosphate/sodium carbonate ion battery positive electrode material |
| CN113526552A (en) * | 2021-07-19 | 2021-10-22 | 湖南科技大学 | Composite positive electrode active material of lithium ion battery and preparation method thereof |
| CN116706036A (en) * | 2023-07-24 | 2023-09-05 | 湖北万润新能源科技股份有限公司 | Carbon-coated cation doped sodium vanadium phosphate positive electrode material, and preparation method and application thereof |
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| CN102496716A (en) * | 2011-12-29 | 2012-06-13 | 哈尔滨工业大学 | Lithium vanadium phosphate base battery material with rhombohedral structure and preparation method thereof |
| CN102569797A (en) * | 2012-01-20 | 2012-07-11 | 中国科学院宁波材料技术与工程研究所 | Novel phosphate based composite cathode material, its preparation method and application thereof |
| CN103043639A (en) * | 2012-12-24 | 2013-04-17 | 彩虹集团公司 | Preparation method of spherical lithium iron phosphate anode materials |
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2017
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| CN102496716A (en) * | 2011-12-29 | 2012-06-13 | 哈尔滨工业大学 | Lithium vanadium phosphate base battery material with rhombohedral structure and preparation method thereof |
| CN102569797A (en) * | 2012-01-20 | 2012-07-11 | 中国科学院宁波材料技术与工程研究所 | Novel phosphate based composite cathode material, its preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113104828A (en) * | 2021-03-19 | 2021-07-13 | 三峡大学 | Preparation method of porous carbon modified sodium iron pyrophosphate phosphate/sodium carbonate ion battery positive electrode material |
| CN113104828B (en) * | 2021-03-19 | 2022-11-08 | 三峡大学 | Preparation method of porous carbon modified sodium iron pyrophosphate phosphate/sodium carbonate ion battery positive electrode material |
| CN113526552A (en) * | 2021-07-19 | 2021-10-22 | 湖南科技大学 | Composite positive electrode active material of lithium ion battery and preparation method thereof |
| CN113526552B (en) * | 2021-07-19 | 2023-02-21 | 湖南科技大学 | Composite positive electrode active material of lithium ion battery and preparation method thereof |
| CN116706036A (en) * | 2023-07-24 | 2023-09-05 | 湖北万润新能源科技股份有限公司 | Carbon-coated cation doped sodium vanadium phosphate positive electrode material, and preparation method and application thereof |
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Application publication date: 20170517 |
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