CN109301238A - A kind of high-performance sodium-ion battery positive material and preparation method thereof - Google Patents
A kind of high-performance sodium-ion battery positive material and preparation method thereof Download PDFInfo
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- CN109301238A CN109301238A CN201811049969.2A CN201811049969A CN109301238A CN 109301238 A CN109301238 A CN 109301238A CN 201811049969 A CN201811049969 A CN 201811049969A CN 109301238 A CN109301238 A CN 109301238A
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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 present invention provides a kind of preparation method of high-performance sodium-ion battery positive material, includes the following steps: that the sodium source of stoichiometric ratio, manganese source, cobalt source, nickel source and fused-salt medium are fully ground uniformly by (1), obtain precursor mixture；(2) precursor mixture obtained in step (1) is dispersed in organic dispersion solvent, seals, stirs at low speed 4-12h at room temperature, obtain suspended dispersion liquid；(3) suspended dispersion liquid obtained in step (2) is transferred in thermostatic drying chamber, is dried 6-12h, evaporates organic solvent therein, obtained drying sample carries out secondary be fully ground.The preparation method of high-performance sodium-ion battery positive material of the present invention is synthesized based on the molten-salt growth method of sodium salt, sodium-ion battery positive material is synthesized compared to traditional high temperature solid-state method, this method can be while obtaining high-crystallinity positive electrode, it can be effectively reduced the synthesis temperature of reaction, reduce energy consumption.
Description
Technical field
The invention belongs to sodium-ion battery technical field, more particularly, to a kind of high-performance sodium-ion battery positive material and
Preparation method.
Background technique
Compared to lithium resource, extensive advisability due to sodium resource, chargeable low cost sodium-ion battery has attracted people
Great interest, sodium-ion battery, which can substitute lithium ion battery, has extraordinary application in electrochemical energy storage application field
Prospect.However, the practical development of sodium-ion battery is not very successful, have enough because being difficult to find suitable host material
Electrochemistry capacitance and reversible Na+ deintercalation electrochemical reaction behavior.Although the host compound of a large portion, for example, it is poly-
Anion fluorophosphate, the iron cyanide, prussian blue, the polymer with redox active, the oxide of tunnel structure,
The oxide and stratiform transition metal oxide of spinel-type, these have been proved to have certain specific capacity and cyclicity to make
For sodium-ion battery energy storage positive electrode, compared with corresponding anode material for lithium-ion batteries, these sodium-ion battery anode materials
The performance of material is also difficult to meet application, their poor capacity, cyclical stability and high rate performances constrain sodium-ion battery
Extensive application.
Existing sodium-ion battery positive material, due to its poor chemical property (less reversible discharge specific capacity,
Poor cycle performance and high rate performance) it is difficult that anode material for lithium-ion batteries is replaced to carry out large-scale promotion use, to limit
The development and business application of sodium-ion battery positive material are made.
Summary of the invention
In view of this, the present invention is directed to propose a kind of high-performance sodium-ion battery positive material and preparation method thereof, Gao Xing
Energy sodium-ion battery positive material is easy to operate, has prospects for commercial application.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of preparation method of high-performance sodium-ion battery positive material, includes the following steps:
(1) sodium source of stoichiometric ratio, manganese source, cobalt source, nickel source and fused-salt medium are fully ground uniformly, obtain presoma
Mixture；
(2) precursor mixture obtained in step (1) is dispersed in organic dispersion solvent, is sealed, at room temperature low speed
4-12h is stirred, suspended dispersion liquid is obtained；
(3) suspended dispersion liquid obtained in step (2) is transferred in thermostatic drying chamber, is dried 6-12h, evaporates
Organic solvent therein, obtained drying sample carry out secondary be fully ground；
(4) the uniform drying mixture after grinding in step (3) is transferred in Muffle furnace, is sintered under high temperature, be sintered gas
Atmosphere is air；
(5) sintered block in step (4) is sufficiently finely ground, washing suction filtration is carried out with distilled water, is sufficiently washed away molten
Salt medium is dried overnight at 120 DEG C, calcines 12h at 300 DEG C then to get the high-performance sodium-ion battery ternary
Positive electrode.
Further, the sodium source in the step (1) is sodium acetate, sodium nitrate, sodium hydroxide, sodium carbonate or sodium bicarbonate
One or more of combination.
Further, the manganese source in the step (1) is one or more of manganese acetate, manganese nitrate or manganese oxalate
Combination；Cobalt source in the step (1) is the combination of one or more of cobalt acetate, cobalt nitrate or cobalt oxalate；
Nickel source in the step (1) is the combination of one or more of nickel acetate, nickel nitrate or nickel oxalate.
Further, the fused-salt medium is the combination of one or more of NaCl, NaI or NaBr；Described
The molar ratio of fused-salt medium and the high-performance sodium-ion battery tertiary cathode material being prepared is (4-8): 1.
Further, the organic dispersing agent in the step (2) be methanol, ethyl alcohol, ether or acetone one or two with
On combination；The volume ratio of the organic dispersing agent and precursor mixture is (10-30): 1.
Further, the temperature of the thermostatic drying chamber in the step (3) is 60-100 DEG C.
Further, the temperature of the sintering step in the step (4) is 650-850 DEG C, sintering time 10-20h.
A kind of high-performance sodium that the preparation method using the high-performance sodium-ion battery positive material is prepared from
Sub- cell positive material, the chemical general formula of the material are Nax[MnaCobNic]O2, wherein 0.4≤x≤1,0.55≤a≤0.75,
0.15≤b≤0.35,0.1≤c≤0.3, a+b+c=1.
Preferably, the chemical general formula of the material is Nax[MnaCobNic]O2, wherein wherein 0.50≤x≤0.70,
0.60≤a≤0.70,0.15≤b≤0.25,0.15≤c≤0.20, a+b+c=1.
The high-performance sodium-ion battery positive material Nax[MnaCobNic]O2For P2 phase layer structure, crystallinity it is high and
Without any impurity, crystallographic system is hexagonal crystal system, and space group is P63/mmc (no.194), and product morphology is hexagonal nanosheet shape
Shape, the size of the nanometer sheet are 0.5-1 μm, and with a thickness of 40-100nm, the direction of nanometer sheet crystal face exposure is [010] face, should
Crystal face is vertical with the direction of sodium ion deintercalation, be sodium ion can deintercalation active crystal face, be conducive to the quick transmission of sodium ion, and
The diffusion path of ion and electronics is substantially reduced, high degree improves the charge discharge performance of the material.
A kind of anode, the anode include collector, conductive agent, binder, organic solvent and the high-performance sodium
Ion battery positive electrode.
A kind of sodium-ion battery uses the high-performance sodium-ion battery tertiary cathode material in the sodium-ion battery.
The preparation method of the sodium-ion battery, includes the following steps:
The Na that will be preparedx[MnaCobNic]O2Sodium-ion battery positive material and conductive agent carbon black (SP), binder gather
Vinylidene (PVDF), organic solvent N-Methyl pyrrolidone (NMP) after mixing, coated on 13 μm of aluminium foils, are made
Sodium-ion battery anode pole piece is kept apart positive and negative using metal Na piece as cathode using 2300 microporous barrier of Celgard as diaphragm
Pole, with the NaPF of 1.0M6The mixed liquor of EC/DEC=1:1 is prepared into CR2016 type button cell and tests its electricity as electrolyte
Chemical property.
Compared with the existing technology, high-performance sodium-ion battery positive material of the present invention and preparation method thereof have with
Lower advantage:
(1) preparation method of high-performance sodium-ion battery positive material of the present invention is closed based on the molten-salt growth method of sodium salt
At compared to traditional high temperature solid-state method synthesis sodium-ion battery positive material, this method can obtain high-crystallinity anode
While material, the synthesis temperature of reaction can be effectively reduced, reduce energy consumption；And the fused-salt medium after washing can return
It receives, fused-salt medium is reusable, effectively reduces the consumption of resource.Sodium-ion battery positive material of the invention is improving material
While performance, the production cost of material is effectively reduced.
(2) high-performance sodium-ion battery positive material product morphology of the present invention is hexagonal nanosheet shape, should
The size of nanometer sheet is 0.5-1 μm, with a thickness of 40-100nm, and has biggish specific surface area, substantially reduces ion/electronics
Diffusion path, improve material ions/electronics kinetics of diffusion, dramatically improve the electrochemistry charge and discharge of the material
Electrical property.
(3) preparation method of high-performance sodium-ion battery positive material of the present invention is reproducible, easy to operate, tool
There is the prospect of large-scale industry amplification application.
(4) sodium-ion battery that high-performance sodium-ion battery positive material of the present invention is assembled into is with higher to be put
Electric specific capacity, excellent high rate performance and cycle performance, it is 110mAh/g that capacity, which plays, under 1C multiplying power, in 20C super-high power
Still there is the specific discharge capacity of 18.1mAh/g under rate, and 200 circle full capacity of circulation is almost unattenuated under 20C multiplying power, conservation rate
To show outstanding high magnification dynamic performance.
Detailed description of the invention
Fig. 1 is the XRD diagram for the high-performance sodium-ion battery tertiary cathode material that the embodiment of the present invention 1 is prepared；
Fig. 2 is the SEM figure for the high-performance sodium-ion battery tertiary cathode material that the embodiment of the present invention 1 is prepared；
Fig. 3 is the TEM figure for the high-performance sodium-ion battery tertiary cathode material that the embodiment of the present invention 1 is prepared；
Individual particle in the high-performance sodium-ion battery tertiary cathode material that Fig. 4 is prepared for the embodiment of the present invention 1
TEM figure；
Fig. 5 is the high-performance sodium-ion battery tertiary cathode material crystal structure signal that the embodiment of the present invention 1 is prepared
Figure
Fig. 6 is the high-performance sodium-ion battery tertiary cathode material Na+ deintercalation signal that the embodiment of the present invention 1 is prepared
Figure；
Fig. 7 is that the button cell for the high-performance sodium-ion battery tertiary cathode material that the embodiment of the present invention 1 is prepared is first
Enclose the charging and discharging curve figure under low range；
Fig. 8 is that the button cell for the high-performance sodium-ion battery tertiary cathode material that the embodiment of the present invention 1 is prepared exists
Cycle performance figure under different multiplying.
Specific embodiment
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention
The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described
Experimental method is unless otherwise specified conventional method.
Below with reference to examples and drawings, the present invention will be described in detail.
Embodiment 1
A kind of preparation method of high-performance sodium-ion battery positive material, includes the following steps: to take 5.15mmol NaOH
(excessive 3wt.%), 6.5mmol MnC2O4, 2.0mmol CoC2O4, 1.5mmol NiC2O4It is ground with 40mmol NaCl fused salt
It is dispersed in 150ml acetone after mixing, seals, stir at low speed 4h at room temperature, place it in 60 DEG C of freeze-day with constant temperature later
In case, until acetone slowly volatilizees and finishes, the sample of obtained drying is fully ground, and forms uniform mixture.Then by it
It is placed in Muffle furnace, the lower 800 DEG C of calcinings 15h of air atmosphere, heating rate is 5 DEG C/min.It is molten in order to remove after being cooled to room temperature
Salt medium, obtained powder mull is uniformly dried overnight with after a large amount of distillation water washing at 120 DEG C afterwards, finally in 300 DEG C of weights
New calcining 12h is to get the high-performance sodium-ion battery positive material, chemical molecular formula Na0.5[Mn0.65Co0.2Ni0.15]
O2。
A kind of sodium-ion battery, includes the following steps: the high-performance sodium-ion battery positive material that will be prepared and leads
Electric agent SP, binder PVDF, organic solvent NMP are after mixing, positive coated in sodium-ion battery on 13 μm of aluminium foils, is made
Pole piece keeps apart positive and negative anodes using 2300 microporous barrier of Celgard as diaphragm, with 1.0M's using metal Na piece as cathode
NaPF6, the mixed liquor of EC/DEC=1:1 is prepared into CR2016 type button cell and tests its chemical property as electrolyte.
Embodiment 2
A kind of preparation method of high-performance sodium-ion battery positive material, includes the following steps: to take 5.05mmol
CH3COONa (excessive 1wt.%), 6.0mmol Mn (CH3COO)2, 2.5mmol Co (CH3COO)2, 1.5mmol Ni
(CH3COO)2With 60mmol NaI fused salt ground and mixed it is uniform after be dispersed in 200ml ethyl alcohol, seal, stir at low speed at room temperature
6h is placed it in later in 80 DEG C of thermostatic drying chambers, until ethyl alcohol slowly volatilizees and finishes, the sample of obtained drying is sufficiently ground
Mill, forms uniform mixture.It is then placed in Muffle furnace, the lower 700 DEG C of calcinings 12h of air atmosphere, heating rate 5
℃/min.After being cooled to room temperature, in order to remove fused-salt medium, obtained powder mull is uniformly afterwards with after a large amount of distillation water washing
It is dried overnight at 120 DEG C, calcines 12h again at 300 DEG C finally to get high-performance sodium-ion battery positive material, chemical molecular
Formula is Na0.5[Mn0.60Co0.25Ni0.15]O2。
A kind of sodium-ion battery, includes the following steps: the high-performance sodium-ion battery positive material that will be prepared and leads
Electric agent SP, binder PVDF, organic solvent NMP after mixing, coated on 13 μm of aluminium foils, with sodium-ion battery anode
Pole piece, using metal Na piece as cathode, keeps apart positive and negative anodes using 2300 microporous barrier of Celgard as diaphragm as anode, with
The NaPF of 1.0M6, the mixed liquor of EC/DEC=1:1 is prepared into CR2016 type button cell and tests its electrochemistry as electrolyte
Performance.
Embodiment 3:
A kind of preparation method of high-performance sodium-ion battery positive material, includes the following steps: to take 5.25mmol NaNO3
(excessive 5wt.%), 7.0mmol Mn (NO3)2, 1.5mmol Co (NO3)2, 1.5mmol Ni (NO3)2It is molten with 80mmol NaBr
It is dispersed in after salt ground and mixed is uniform in 250ml methanol, seals, stir at low speed 8h at room temperature, place it in 100 DEG C of perseverances later
In warm drying box, until methanol slowly volatilizees and finishes, the sample of obtained drying is fully ground, and forms uniform mixture.So
After place it in Muffle furnace, the lower 750 DEG C of calcinings 18h of air atmosphere, heating rate be 5 DEG C/min.After being cooled to room temperature, in order to
Fused-salt medium is removed, obtained powder mull is uniformly dried overnight afterwards at 120 DEG C with after a large amount of distillation water washing, is finally existed
300 DEG C are calcined 12h again to get high-performance sodium-ion battery positive material, chemical molecular formula Na0.5
[Mn0.70Co0.15Ni0.15]O2。
A kind of sodium-ion battery, includes the following steps: the high-performance sodium-ion battery positive material that will be prepared and leads
Electric agent SP, binder PVDF, organic solvent NMP are after mixing, positive coated in sodium-ion battery on 13 μm of aluminium foils, is made
Pole piece keeps apart positive and negative anodes using 2300 microporous barrier of Celgard as diaphragm, with 1.0M's using metal Na piece as cathode
NaPF6, the mixed liquor of EC/DEC=1:1 is prepared into CR2016 type button cell and tests its chemical property as electrolyte.
The button cell that high-performance sodium ion positive electrode is assembled into prepared by embodiment 1-3 shows excellent put
Electric specific capacity and high rate performance.Wherein, the specific discharge capacity of first circle is up to 169.4mAh g-1, multiplying power be 0.5C, 1C, 2C,
Specific discharge capacity under 5C, 10C has respectively reached 124,110,99,76 and 37mAh g-1。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of high-performance sodium-ion battery positive material, characterized by the following steps:
(1) sodium source of stoichiometric ratio, manganese source, cobalt source, nickel source and fused-salt medium are fully ground uniformly, obtain presoma mixing
Object；
(2) precursor mixture obtained in step (1) is dispersed in organic dispersion solvent, seals, stirs at low speed at room temperature
4-12h obtains suspended dispersion liquid；
(3) suspended dispersion liquid obtained in step (2) is transferred in thermostatic drying chamber, is dried 6-12h, evaporates wherein
Organic solvent, obtained drying sample carries out secondary is fully ground；
(4) the uniform drying mixture after grinding in step (3) is transferred in Muffle furnace, is sintered under high temperature, sintering atmosphere is
Air；
(5) sintered block in step (4) is sufficiently finely ground, washing suction filtration is carried out with distilled water, sufficiently washes away fused salt Jie
Matter is dried overnight at 120 DEG C, calcines 12h at 300 DEG C then to get the high-performance sodium-ion battery tertiary cathode
Material.
2. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
Sodium source in step (1) is one or more of sodium acetate, sodium nitrate, sodium hydroxide, sodium carbonate or sodium bicarbonate
Combination.
3. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
Manganese source in step (1) is the combination of one or more of manganese acetate, manganese nitrate or manganese oxalate；The step (1)
In cobalt source be one or more of cobalt acetate, cobalt nitrate or cobalt oxalate combination；Nickel source in the step (1)
For the combination of one or more of nickel acetate, nickel nitrate or nickel oxalate.
4. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
Fused-salt medium is the combination of one or more of NaCl, NaI or NaBr；The fused-salt medium and the height being prepared
The molar ratio of performance sodium-ion battery tertiary cathode material is (4-8): 1.
5. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
Organic dispersing agent in step (2) is methanol, ethyl alcohol, ether or acetone a combination of one or more；Described organic point
The volume ratio of powder and precursor mixture is (10-30): 1.
6. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
The temperature of thermostatic drying chamber in step (3) is 60-100 DEG C.
7. the preparation method of high-performance sodium-ion battery positive material according to claim 1, it is characterised in that: described
The temperature of sintering step in step (4) is 650-850 DEG C, sintering time 10-20h.
8. prepared by a kind of preparation method using the high-performance sodium-ion battery positive material of any of claims 1-7
Obtained high-performance sodium-ion battery positive material, it is characterised in that: the chemical general formula of the material is Nax[MnaCobNic]O2,
In 0.4≤x≤1,0.55≤a≤0.75,0.15≤b≤0.35,0.1≤c≤0.3, a+b+c=1.
9. high-performance sodium-ion battery positive material according to claim 8, it is characterised in that: the chemistry of the material
General formula is Nax[MnaCobNic]O2, wherein 0.50≤x≤0.70,0.60≤a≤0.70,0.15≤b≤0.25,0.15≤c≤
0.20, a+b+c=1.
10. a kind of anode, the anode includes collector, conductive agent, binder, institute in organic solvent and claim 8 or 9
The high-performance sodium-ion battery positive material stated.
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Cited By (4)
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| CN111092220A (en) * | 2019-12-20 | 2020-05-01 | 华南理工大学 | M-element bulk phase doped modified manganese-based positive electrode material of tunnel-type sodium-ion battery and preparation method thereof |
| CN112591804A (en) * | 2020-12-09 | 2021-04-02 | 上海交通大学 | Transition metal oxide material and preparation method thereof |
| CN112886084A (en) * | 2021-01-13 | 2021-06-01 | 上海紫剑化工科技有限公司 | Method for repairing layered oxide positive electrode material of sodium ion battery |
| CN115810743A (en) * | 2022-12-14 | 2023-03-17 | 南京大学 | Single crystal layered oxide positive electrode material, preparation method and application in sodium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111092220A (en) * | 2019-12-20 | 2020-05-01 | 华南理工大学 | M-element bulk phase doped modified manganese-based positive electrode material of tunnel-type sodium-ion battery and preparation method thereof |
| CN112591804A (en) * | 2020-12-09 | 2021-04-02 | 上海交通大学 | Transition metal oxide material and preparation method thereof |
| CN112591804B (en) * | 2020-12-09 | 2022-03-15 | 上海交通大学 | Transition metal oxide material and preparation method thereof |
| CN112886084A (en) * | 2021-01-13 | 2021-06-01 | 上海紫剑化工科技有限公司 | Method for repairing layered oxide positive electrode material of sodium ion battery |
| CN112886084B (en) * | 2021-01-13 | 2022-06-03 | 上海紫剑化工科技有限公司 | Method for repairing layered oxide positive electrode material of sodium ion battery |
| CN115810743A (en) * | 2022-12-14 | 2023-03-17 | 南京大学 | Single crystal layered oxide positive electrode material, preparation method and application in sodium ion battery |
| CN115810743B (en) * | 2022-12-14 | 2023-08-04 | 南京大学 | Single crystal layered oxide positive electrode material, preparation method and application thereof in sodium ion battery |
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Application publication date: 20190201 |