CN109638233A - A kind of solid state ionic conductor and lithium-rich manganese base material combination electrode and lithium ion battery - Google Patents
A kind of solid state ionic conductor and lithium-rich manganese base material combination electrode and lithium ion battery Download PDFInfo
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- CN109638233A CN109638233A CN201811260011.8A CN201811260011A CN109638233A CN 109638233 A CN109638233 A CN 109638233A CN 201811260011 A CN201811260011 A CN 201811260011A CN 109638233 A CN109638233 A CN 109638233A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/1391—Processes of manufacture of 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
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
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- 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 solid state ionic conductor and lithium-rich manganese base material combination electrode, including lithium-rich manganese base material and solid state ionic conductor, and the chemical formula of the lithium-rich manganese base material is xLi2MnO3·(1‑x)LiMO2, wherein 0 < x < 1, one of M Mn, Ni, Co or a variety of；The chemical formula of the solid state ionic conductor is Li1+a[AbB2‑c(DO4)3] or Li2+αEβG3+γ.The present invention also proposes the lithium ion battery comprising the combination electrode.Solid state ionic conductor has excellent ionic conductivity, and the lithium ion transport rate of electrode can be improved in the composite solid ion conductor in lithium-rich manganese-based electrode.In battery charge and discharge process, solid state ionic conductor participates in the forming process of the solid electrolyte film on lithium-rich manganese base material surface, reduces the membrane impedance of lithium-rich manganese-based anode, so as to improve the high rate performance and cyclical stability of lithium-rich manganese-based electrode.
Description
Technical field
The invention belongs to battery material field, the anode more particularly to a kind of lithium ion battery and the lithium containing the anode
Ion battery.
Background technique
Since Sony company in 1991 realizes lithium ion battery commercialization, lithium ion battery because its energy density is high,
It has extended cycle life and is widely used in miniaturized electronic product, energy storage device, electric car the advantages that memory-less effect
Equal fields.Lithium ion battery is mainly made of four positive electrode, negative electrode material, electrolyte and diaphragm elements, and
Positive electrode is usually the supplier for being used as lithium ion, and positive electrode largely determines that the energy of lithium ion battery is close
The performances such as degree, power density and service life.Currently, common positive electrode has LiCoO2、LiNixCoyMn1-x-yO2With
LiFePO4Deng.
Lithium-rich manganese base material capacity is high, operating voltage is high, cheap, is expected to become next-generation high specific energy lithium ion battery
Positive electrode.However, voltage attenuation, high rate performance in lithium-rich manganese base material there is also first all coulombic efficiencies low, cyclic process
The problems such as poor.
In order to solve problem above, the performance of lithium-rich manganese-based anode is improved, researchers generally use cladding, doping, answer
The method of conjunction is modified optimization to lithium-rich manganese base material.The patent of Publication No. CN107681147A discloses a kind of coat and changes
Property anode material for lithium-ion batteries method, by solvent heat combination high temperature sintering, positive electrode surface coat one layer fastly from
Sub- conductor LiAlO2, reduces contact of the positive electrode with liquid electrolyte, helps to improve the circulation of lithium ion cell positive
Service life.The patent of Publication No. CN103928664A discloses a kind of method of coating modification lithium-rich manganese base material, by rich lithium manganese
Sill is directly mixed with phosphate, then by the method for high temperature sintering, is coated on lithium-rich manganese base material surface by Li3PO4With
Li4P2O7The clad of composition improves all coulombic efficiencies of head of lithium-rich manganese-based anode, improves its circulation and high rate performance.But
In the above method, material surface clad integrality and the thickness uniformity are difficult to control, and preparation process is more complex, higher cost,
Thus limit its industrial applications.
Summary of the invention
In view of the deficiencies of the prior art, the first purpose of the invention is to provide a kind of solid state ionic conductors and rich lithium
Mn-based material combination electrode, there are ionic conductivity with higher (> 10 for solid state ionic conductor crystals-4S/cm), ion
The activation energy of conductance is low (< 0.5eV).Although solid state ionic conductor is solid, but its sublattice is in molten state
(see liquid sublattice), therefore it has certain characteristics of liquid again, is based on this, the application explores solid state ionic conductor and richness
The novel electrode structure that lithium Mn-based material combines.
Second object of the present invention is proposed comprising the solid state ionic conductor and the compound electrode of lithium-rich manganese base material
Lithium ion battery.
Realize the technical solution of above-mentioned purpose of the present invention are as follows:
A kind of solid state ionic conductor and lithium-rich manganese base material combination electrode,
Including lithium-rich manganese base material and solid state ionic conductor, the chemical formula of the lithium-rich manganese base material is xLi2MnO3·(1-
x)LiMO2, wherein 0 < x < 1, one of M Mn, Ni, Co or a variety of；
The chemical formula of the solid state ionic conductor is Li1+a[AbB2-c(DO4)3] or Li2+αEβG3+γ, wherein 0≤a≤1,0≤
One of b≤1,0≤c≤1, A Al, Cr, Ga, Fe, Sc, In, Lu, Y or La or a variety of, in B Ti, Ge, Zr and Hf
It is one or more, one of D P, Si and Mo or a variety of；0≤α≤3,0 < β≤1,0 < γ < 2, E Ge, P, Si, Al,
One of Zn, Ti, Ga or a variety of, G are O or S.
Further, the mass ratio of the lithium-rich manganese base material and solid state ionic conductor is (80~99.89): (0.01
~5).
Further, the chemical formula of the solid state ionic conductor is Li1+a[AbB2-c(DO4)3], wherein 0.3≤a≤
One of 0.6,0.3≤b≤0.6,0.3≤c≤0.6, A Al, Cr, Ga, Fe, Sc, In, Lu, Y or La, B Ti, Ge, Zr
One of with Hf, D P.
It is further preferred that the mass ratio of the lithium-rich manganese base material and solid state ionic conductor is 90:(0.5~2.5).
Wherein, the solid state ionic conductor is prepared by the following method with lithium-rich manganese base material combination electrode:
By the lithium-rich manganese base material and solid state ionic conductor mechanical mixture, powder is obtained；By powder and binder or
Powder and conductive agent and binder, are added in n-methyl-2-pyrrolidone together, are uniformly mixed, lithium-rich manganese-based electrode is made
Slurry, then on a current collector by slurry coating, solid state ionic conductor and lithium-rich manganese base material combination electrode is made in drying；
The collector is one of aluminium foil, iron foil.
Wherein, the mass ratio of the lithium-rich manganese base material, solid state ionic conductor, conductive agent and binder be (80~
99.89): (0.01~5): (0~10): (0.1~10).
Wherein, the conductive agent is conductive black, acetylene black, electrically conductive graphite, carbon fiber, carbon nanotube, graphene, oxidation
One or more of graphene；
The binder is one of polyvinylidene fluoride, polytetrafluoroethylene (PTFE).
As a preferred technical solution of the present invention, the solid state ionic conductor and lithium-rich manganese base material combination electrode are logical
Cross following methods preparation:
Take the 0.5Li of 87.2~95.2 mass parts2MnO3·0.5LiNi0.5Mn0.5O2Type lithium-rich manganese base material with 0.8~
The solid state ionic conductor Li of 1.8 mass parts1.5Al0.5Ge1.5(PO4)3, mechanical system mixing, then by gained powder and 2~6 matter
The binder of the conductive agent, 2~5 mass parts of measuring part is added in n-methyl-2-pyrrolidone (NMP), is sufficiently stirred, and is made solid
Slurry is coated on aluminium foil by body ion conductor and lithium-rich manganese base material combination electrode slurry later, dry, roll-in, consolidate
State ion conductor and lithium-rich manganese base material combination electrode.
A kind of lithium ion battery includes anode, cathode, diaphragm, electrolyte and packaging material, wherein just extremely of the invention
Solid state ionic conductor and lithium-rich manganese base material combination electrode.
Wherein, the cathode of the lithium ion battery is one of lithium metal, graphite electrode, silicon/carbon complex electrode；It is excellent
Selection of land, the packaging material of the lithium ion battery are one of aluminum plastic film, aluminum hull, steel shell or plastic-aluminum shell.
Technical solution of the present invention has the advantages that
Solid state ionic conductor has excellent lithium ion conductive, and solid state ionic conductor is added in lithium-rich manganese base material, can
To improve the lithium ion transport rate of electrode.In battery charge and discharge process, fast-ionic conductor can participate in lithium-rich manganese-based material
The forming process for expecting the solid electrolyte film on surface, reduces the membrane impedance of lithium-rich manganese base material, so as to improve lithium-rich manganese-based
The high rate performance and cyclical stability of electrode.Preparation is simple for lithium-rich manganese-based lithium ion battery provided by the invention, system
Make at low cost, favorable reproducibility is conducive to industrialized production.
Detailed description of the invention
Fig. 1 is the high rate performance curve of embodiment 1, embodiment 2 and comparative example.
Fig. 2 is the electrochemical impedance spectroscopy of embodiment 1 and comparative example.
Fig. 3 is the cycle performance curve of embodiment 2 and comparative example.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is done into one below in conjunction with specific embodiments and drawings
Step description, following embodiment is only that the present invention will be described rather than is limited.
In embodiment, unless otherwise noted, used method is the method for this field routine.
Number in embodiment refers both to mass parts if not specified.
Comparative example:
By 90 parts of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2Type lithium-rich manganese base material, 2 parts of conductive black, 4 parts
Electrically conductive graphite, 4 parts of PVDF are added in NMP, are sufficiently stirred, and lithium-rich manganese-based electrode slurry is made, is later coated in slurry
Dry on aluminium foil, roll-in obtains lithium-rich manganese-based electrode plates.Lithium-rich manganese-based electrode plates, diaphragm and lithium piece are being full of argon gas
Glove box in assemble, inject electrolyte, lithium-rich manganese-based lithium-ion button battery is made.This comparative example is for embodiment 1 and reality
It applies example 2 and compares reference.
Embodiment 1:
Take 90 parts of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2Type lithium-rich manganese base material and 2 parts of solid state ionic conductor
Li1.5Al0.5Ge1.5(PO4)3, the ground and mixed 0.5h in mortar, then by gained mixed powder and 2 parts of conductive black, 2 parts
Electrically conductive graphite, 4 parts of PVDF be added in NMP, be sufficiently stirred, lithium-rich manganese-based electrode slurry be made, later coats slurry
Dry on aluminium foil, roll-in obtains solid state ionic conductor and lithium-rich manganese-based composite electrode pole piece.By lithium-rich manganese-based electrode plates,
Diaphragm and lithium piece assemble in the glove box full of argon gas, inject electrolyte, lithium-rich manganese-based lithium-ion button battery is made.
The high-rate discharge ability of 1 battery of test comparison example battery and embodiment.Wherein, in embodiment 1 battery electric discharge
Specific capacity is apparently higher than the specific discharge capacity (see Fig. 1) of battery in comparative example, and specific discharge capacity reaches under 0.1C multiplying power
199.8mAh/g, specific discharge capacity reaches 164.6mAh/g under 0.5C multiplying power, and specific discharge capacity reaches 147.2mAh/ under 1C multiplying power
G, specific discharge capacity reaches 125.2mAh/g under 2C multiplying power, and specific discharge capacity reaches 111.7mAh/g under 3C multiplying power, in 5C multiplying power
Lower specific discharge capacity reaches 55.8mAh/g.
Electrochemical impedance after 1 cell activation of test comparison example battery and embodiment when charging state 50%.Wherein embodiment 1
The membrane impedance of middle battery is significantly less than the membrane impedance (see Fig. 2) of battery in comparative example, according to equivalent circuit as shown in the figure in ZView
It is 25.87 Ω that simulation, which obtains the membrane impedance of comparative example, in software, and the membrane impedance of embodiment 1 is 19.17 ohm.Than comparative example battery
Impedance it is small by about 25%.
Embodiment 2:
Take 90 parts of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2Type lithium-rich manganese base material and 1 part of solid state ionic conductor
Li1.5Al0.5Ge1.5(PO4)3, the ground and mixed 0.5h in mortar, then by gained mixed powder and 2 parts of conductive black, 3 parts
Electrically conductive graphite, 4 parts of PVDF be added in NMP, be sufficiently stirred, lithium-rich manganese-based electrode slurry be made, later coats slurry
Dry on aluminium foil, roll-in obtains solid state ionic conductor and lithium-rich manganese-based compound electrode plates.By lithium-rich manganese-based electrode pole
Piece, diaphragm and lithium piece assemble in the glove box full of argon gas, inject electrolyte, lithium-rich manganese-based lithium-ion button battery is made.
Battery specific discharge capacity under 0.1C multiplying power reaches 201.2mAh/g, and specific discharge capacity reaches under 0.5C multiplying power
167.2mAh/g, specific discharge capacity reaches 150.2mAh/g under 1C multiplying power, and specific discharge capacity reaches 128.2mAh/g under 2C multiplying power,
Specific discharge capacity reaches 117.5mAh/g under 3C multiplying power, and specific discharge capacity reaches 68.3mAh/g under 5C multiplying power.It is under high magnification
With better volumetric properties (referring to Fig. 1).
The cycle performance of test comparison example battery and 2 battery of embodiment in 2.0~4.7V voltage range.Wherein embodiment 2
Capacity retention ratio is 64.7% after battery 1C is recycled 100 weeks, and the capacity retention ratio after comparative example battery 1C is recycled 100 weeks only has
55.0% (see Fig. 3).
Embodiment 3:
Take 92 parts of 0.6Li2MnO3·0.4LiNi1/3Co1/3Mn1/3O2Type lithium-rich manganese base material is led with 3 parts of solid ionic
Body Li1.4Al0.4Ti1.6(PO4)3, ball milling mixing 1h, then by gained mixed powder and 1.8 parts of conductive black, 0.2 part of carbon
Nanotube, 3 parts of PVDF are added in NMP, are sufficiently stirred, and lithium-rich manganese-based electrode slurry is made, and slurry is coated in aluminium later
On foil, after drying, roll-in, slice, lithium-rich manganese-based electrode plates are obtained.By artificial plumbago negative pole material, conductive black, lead
Electro-graphitic, PVDF are uniformly mixed according to the ratio of 93:1:1:5, are coated on copper foil, after dry roll-in, slice, are born
Pole pole piece.Laminated aluminum film bag will be enclosed after lithium-rich manganese-based electrode plates, diaphragm, cathode pole piece assembling, injects electrolyte, be made
Lithium-rich manganese-based Soft Roll full battery.
Battery specific discharge capacity under 0.1C multiplying power reaches 197.2mAh/g, and specific discharge capacity reaches under 1C multiplying power
145.1mAh/g, specific discharge capacity reaches 105.3mAh/g under 3C multiplying power, and specific discharge capacity reaches 51.2mAh/g under 5C multiplying power.
Embodiment 4:
Take 96 parts of 0.5Li2MnO3·0.5LiNi0.5Co0.2Mn0.3O2Type lithium-rich manganese base material is led with 1 part of solid ionic
Body Li1.5Al0.5Ti1.5(PO4)3, mix 3h in the ball mill, then by gained mixed powder and 0.95 part of conductive black,
0.05 part of graphene, 2 parts of PVDF are added in NMP, are sufficiently stirred, and lithium-rich manganese-based electrode slurry is made, later by slurry
Coated on aluminium foil, after drying, roll-in, slice, lithium-rich manganese-based electrode plates are obtained.By Si-C composite material, conductive charcoal
Black, electrically conductive graphite, carboxymethyl cellulose, butadiene-styrene rubber are uniformly mixed according to the ratio of 92:1:1:3:3, are coated on copper foil, warp
After crossing dry roll-in, slice, cathode pole piece is obtained.Lithium-rich manganese-based electrode plates, diaphragm, cathode pole piece are assembled in stainless steel circle
In column shell, electrolyte is injected, lithium-rich manganese-based steel shell cylinder full battery is made.
Although above by embodiment, the present invention is described, however, it will be appreciated by those skilled in the art that without departing from
Under the premise of spirit of that invention and essence, to the improvement and modification that the present invention is done, it is within the scope of protection of the invention interior.
Claims (10)
1. a kind of solid state ionic conductor and lithium-rich manganese base material combination electrode, which is characterized in that including lithium-rich manganese base material and admittedly
State ion conductor, the chemical formula of the lithium-rich manganese base material are xLi2MnO3·(1-x)LiMO2, wherein 0 < x < 1, M Mn,
One of Ni, Co or a variety of；
The chemical formula of the solid state ionic conductor is Li1+a[AbB2-c(DO4)3] or Li2+αEβG3+γ, wherein 0≤a≤1,0≤b≤
One of 1,0≤c≤1, A Al, Cr, Ga, Fe, Sc, In, Lu, Y or La or a variety of, one of B Ti, Ge, Zr and Hf
Or a variety of, one of D P, Si and Mo or a variety of；0≤α≤3,0 < β≤1,0 < γ < 2, E Ge, P, Si, Al, Zn,
One of Ti, Ga or a variety of, G are O or S.
2. solid state ionic conductor according to claim 1 and lithium-rich manganese base material combination electrode, which is characterized in that the richness
The mass ratio of lithium Mn-based material and fast-ionic conductor is (80~99.89): (0.01~5).
3. solid state ionic conductor according to claim 1 and lithium-rich manganese base material combination electrode, which is characterized in that described solid
The chemical formula of state ion conductor is Li1+a[AbB2-c(DO4)3], wherein 0.3≤a≤0.6,0.3≤b≤0.6,0.3≤c≤0.6,
A is one of Al, Cr, Ga, Fe, Sc, In, Lu, Y or La, one of B Ti, Ge, Zr and Hf, D P.
4. described in any item solid state ionic conductors and lithium-rich manganese base material combination electrode, feature exist according to claim 1~3
In the mass ratio of the lithium-rich manganese base material and fast-ionic conductor is 90:(0.5~2.5).
5. solid state ionic conductor according to claim 1 and lithium-rich manganese base material combination electrode, which is characterized in that described solid
State ion conductor is prepared by the following method with lithium-rich manganese base material combination electrode:
By the lithium-rich manganese base material and fast-ionic conductor mechanical mixture, powder is obtained；By powder and binder or powder with
Conductive agent and binder, are added in n-methyl-2-pyrrolidone together, are uniformly mixed, lithium-rich manganese-based electrode slurry are made, so
Afterwards on a current collector by slurry coating, solid state ionic conductor and lithium-rich manganese base material combination electrode is made in drying；
The collector is one of aluminium foil, iron foil.
6. solid state ionic conductor according to claim 5 and lithium-rich manganese base material combination electrode, which is characterized in that the richness
Lithium Mn-based material, fast-ionic conductor, conductive agent and binder mass ratio be (80~99.89): (0.01~5): (0~
10): (0.1~10).
7. solid state ionic conductor according to claim 5 and lithium-rich manganese base material combination electrode, which is characterized in that described to lead
Electric agent be one of conductive black, acetylene black, electrically conductive graphite, carbon fiber, carbon nanotube, graphene, graphene oxide or
It is a variety of；The binder is one of polyvinylidene fluoride, polytetrafluoroethylene (PTFE).
8. solid state ionic conductor according to claim 5 and lithium-rich manganese base material combination electrode, which is characterized in that described solid
State ion conductor is prepared by the following method with lithium-rich manganese base material combination electrode:
Take the 0.5Li of 87.2~95.2 mass parts2MnO3·0.5LiNi0.5Mn0.5O2Type lithium-rich manganese base material and 0.8~1.8 matter
Measure the fast-ionic conductor Li of part1.5Al0.5Ge1.5(PO4)3, mechanical system mixing, then leading gained powder and 2~6 mass parts
Electric agent, 2~5 mass parts binder be added in n-methyl-2-pyrrolidone, be sufficiently stirred, be made solid state ionic conductor with
Slurry is coated on aluminium foil by the compound electrode slurry of lithium-rich manganese base material later, dry, and roll-in obtains solid state ionic conductor
With lithium-rich manganese base material combination electrode.
9. a kind of lithium ion battery, which is characterized in that include anode, cathode, diaphragm, electrolyte and packaging material, wherein anode
For solid state ionic conductor according to any one of claims 1 to 8 and lithium-rich manganese base material combination electrode.
10. according to the described in any item lithium ion batteries of claim 9, which is characterized in that the cathode of the lithium ion battery is
One of lithium metal, graphite electrode, silicon/carbon complex electrode；Preferably, the packaging material of the lithium ion battery is plastic-aluminum
One of film, aluminum hull, steel shell or plastic-aluminum shell.
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| CN113937253A (en) * | 2021-10-09 | 2022-01-14 | 桂林理工大学 | Simple method for improving positive performance of lithium ion battery |
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