CN106784789A - A kind of lithium-rich manganese base material lithium ion cell positive and the lithium ion battery comprising the positive pole - Google Patents
A kind of lithium-rich manganese base material lithium ion cell positive and the lithium ion battery comprising the positive pole Download PDFInfo
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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
- H01M10/052—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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- 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 relates to a kind of lithium-rich manganese base material lithium ion cell positive, including plus plate current-collecting body and the positive electrode material layer being coated on plus plate current-collecting body, the positive electrode material layer includes positive active material, the positive active material is lithium-rich manganese base material, the plus plate current-collecting body is coated with the conducting base of the first conductive coating and the second conductive coating for surface, first conductive coating is the mixture of conductive agent and Kynoar, conductive agent is conductive black, electrically conductive graphite, CNT, Graphene, one or more in carbon fiber, first conductive coating is covered in conducting base surface, second conductive coating is the mixture of polyaniline and Kynoar, second conductive coating is covered in the first conductive coating surface.Present invention also offers the lithium ion battery comprising the lithium-rich manganese base material lithium ion cell positive, the battery has the advantages that low DC internal resistance, high rate capability, cycle life more long.
Description
Technical field
The present invention relates to field of lithium ion battery, more particularly to a kind of lithium-rich manganese base material lithium ion cell positive and comprising
The lithium ion battery of the positive pole.
Background technology
Lithium ion battery produces increasingly deep effect to the production and living of people, and day is obtained in modern society
Benefit is widely applied, not only in the portable electronics such as mobile phone, notebook computer, electric tool, in electric automobile field
Also there is extraordinary application prospect.People are also improving constantly to the demand of lithium ion battery, and especially electric automobile is urgent
Need high security, high-energy-density, high power, Large Copacity, long-life, the lithium ion battery of low cost.
In recent years, lithium-rich manganese-based anode material xLi2MnO3·(1-x)LiMO2(wherein M is in Co, Mn, Ni, Cr, Fe, Al
One or more, and 0<x<1) because with technological merits such as high power capacity, low material cost, high working voltages in lithium-ion electric
Of great interest, the study hotspot as art personnel in the positive electrode system of pond, while also becoming high
One of preferred positive electrode of energy type lithium ion battery.Although lithium-rich manganese-based anode material has specific capacity very high, by
The Li containing a large amount of electric conductivity extreme differences in the unstable of its structure, and component2MnO3, its application in lithium ion battery is still
There are problems that bulk effect is obvious, cycle performance is poor, high rate performance in charge and discharge process.
In order to break through the application bottleneck of lithium-rich manganese-based lithium ion battery, it is necessary to propose a kind of good method effectively to be lifted
Its cycle performance and high rate performance.
The content of the invention
The invention aims to volume in the charge and discharge process for solving existing lithium-rich manganese-based lithium ion battery presence
The technical problem such as effect is obvious, high rate performance is poor, cycle performance is poor, and providing a kind of has low DC internal resistance, high power
Rate performance and the lithium ion battery compared with long circulation life.
The present invention is adopted the following technical scheme that：
A kind of lithium-rich manganese base material lithium ion cell positive, including plus plate current-collecting body and be coated on plus plate current-collecting body just
Pole material layer, the positive electrode material layer includes positive active material, positive conductive agent, positive electrode binder, the positive electrode active material
Matter is lithium-rich manganese base material, and the plus plate current-collecting body is coated with the conductive base of the first conductive coating and the second conductive coating for surface
Body, first conductive coating is the mixture of conductive agent and Kynoar, and conductive agent is conductive black, electrically conductive graphite, carbon
One or more in nanotube, Graphene, carbon fiber, first conductive coating is covered in conducting base surface, described
Conductive agent and the accounting of Kynoar are (80~99) in one conductive coating:(1~20), second conductive coating is polyphenyl
The mixture of amine and Kynoar, second conductive coating is covered in the first conductive coating surface, the described second conductive painting
Polyaniline and the accounting of Kynoar are (70~99) in layer:(1~30).
In the technical program, the positive active material is lithium-rich manganese base material, and its formula is：xLi2MnO3·(1-x)
LiMO2, wherein, M is one or more in Co, Mn, Ni, Cr, Fe, Al, and 0<x<1；The positive conductive agent is conductive charcoal
One or more in black, electrically conductive graphite, CNT, Graphene, carbon fiber, polyaniline；The positive electrode binder is carboxylic first
Acid cellulose sodium is combined with butadiene-styrene rubber, one or more in Kynoar, polytetrafluoroethylene (PTFE), polyacrylate, wherein
The weight/mass percentage composition of each component is in positive pole：Positive electrode active materials 80~98%, conductive agent 1~10%, positive electrode binder 1~
10%.
The conducting base is aluminium foil.
The first conductive coating load capacity on the plus plate current-collecting body is 0.1~10.0g/m2, coating layer thickness is 0.1~10
μm。
The second conductive coating load capacity on the plus plate current-collecting body is 0.1~10.0g/m2, coating layer thickness is 0.1~10
μm。
A kind of lithium-rich manganese base material lithium ion battery, including the positive pole, negative pole, barrier film, electrolyte and packaging material, institute
Stating negative pole includes negative current collector and the negative electrode material layer being coated on negative current collector, and the negative electrode material layer is lived including negative pole
Property material, cathode conductive agent, negative electrode binder.
The negative electrode active material is the one kind or many in Delanium, native graphite, soft carbon, hard carbon, lithium titanate or silicon
Kind；The cathode conductive agent is one or more in conductive black, electrically conductive graphite, CNT, Graphene, carbon fiber；Institute
State negative electrode binder combined with butadiene-styrene rubber for carboxylic cellulose formiate sodium, in Kynoar, polytetrafluoroethylene (PTFE), polyacrylate
One or more.
The barrier film is coated with the individual layer PP materials or multilayer PE/PP composite woods of alumina ceramic coating for single or double
Matter barrier film.
The electrolyte includes electrolyte solvent, electrolyte and additive, and the electrolyte solvent is high voltage withstanding solvent,
One or more specially in organic carbonate esters, organic carboxyl acid esters, fluoro esters, ethers, sulfone class；The electrolyte is
LiPF6、LiBF4、Li(CF3SO2)2N、LiCF3SO3In one or more；The additive is the organic matter of base class containing fluoro.
The packaging material are the one kind in aluminum plastic film, aluminum hull, box hat or plastic housing.
Technical advantage of the invention is embodied in：The plus plate current-collecting body surface for being used is coated with containing conductive carbon material first
Conductive coating, can improve the contact situation of positive electrode and conducting base particularly aluminium foil surface, effectively reduce positive electrode material layer
Interface impedance between collector, reduces the internal resistance of cell, hence it is evident that improve the high rate performance of battery.And it is poly- in the second conductive coating
Aniline, also with the distinctive high polymer elastic of polymer, is conducive to electrode in cyclic process in addition to good electric conductivity
The sustained release of material volume effect, improves the adhesive effect between electrode material layer and collector, is conducive to electrode in cyclic process
Keep its structural intergrity.Using Kynoar as adhesive coating in the first conductive coating and the second conductive coating,
The common polymeric binder being easy to get of Kynoar system, stable chemical nature, it is ensured that when battery charges to high voltage
The structural intergrity of conductive coating is still kept, such as will not be occurred after multiple discharge and recharge using the electrode of polyvinyl alcohol polymer
Structure collapses and cause electrode failure, cause battery capacity sharp-decay.And polyaniline involved in the present invention has raw material honest and clean
The features such as valency is easy to get, synthetic method is simple, can be effectively improved the forthright again of battery on the premise of substantially production cost is not increased
Energy and cycle performance.To sum up, the present invention by coated successively on plus plate current-collecting body surface special component the first conductive coating and
Second conductive coating, so that lithium-rich manganese base material lithium ion battery obtains the low internal resistance of cell, high rate capability and more long follows
Ring life-span and other effects.
Specific embodiment
By following examples, the present invention will be further explained.
In the present invention, unless stated otherwise, all percentages are mass percent, and raw materials used and equipment is the neck
The general raw material in domain and conventional equipment.
Embodiment 1
Positive active material is 0.5Li2MnO3·0.5LiNi0.33Co0.33Mn0.33O2, positive conductive agent be conductive black,
The mixture of electrically conductive graphite and CNT, positive electrode binder is Kynoar, and the mass percent of each component is：Positive pole is lived
Property material 90%, positive conductive agent 6% (wherein conductive black 2%, electrically conductive graphite 2%, CNT 2%), with positive pole bond
Agent 4%.
Plus plate current-collecting body has the aluminium foil of the first conductive coating and the second conductive coating, aluminum foil thickness before coating for coated on both sides
It is 20 μm.
Wherein the first conductive coating is the mixture of Graphene and Kynoar, the mass percent of each component in coating
For：Graphene 95%, Kynoar 5%, the coating unilateral loads amount is 0.5g/m2, unilateral maximum gauge is 1 μm.
Wherein the second conductive coating is the mixture of polyaniline and Kynoar, the mass percent of each component in coating
For：Polyaniline 95%, Kynoar 5%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 2 μm.
Negative electrode active material is native graphite, and cathode conductive agent is mixed for conductive black, electrically conductive graphite and carbon nano-fiber
Compound, negative electrode binder is the mixture of carboxylic cellulose formiate sodium and butadiene-styrene rubber, and the mass percent of each component is：Negative pole is lived
Property material 90%, cathode conductive agent 6% (wherein conductive black 2%, electrically conductive graphite 2%, carbon nano-fiber 2%), negative pole bond
Agent 4% (wherein carboxylic cellulose formiate sodium 2%, butadiene-styrene rubber 2%).
Negative current collector is electrolytic copper foil, and copper thickness is 10 μm.
Barrier film is coated with the individual layer PP material barrier films of alumina ceramic coating for one side.
Solvent in electrolyte is by ethylene carbonate, dimethyl carbonate, fluorinated ethylene carbonate according to volume ratio 30:60:
10 compositions, electrolyte is the LiPF of 1mol/L6, additive is the LiBOB of 0.1mol/L.
Embodiment 2
Positive active material is 0.3Li2MnO3·0.7LiNi0.33Co0.33Mn0.33O2, positive conductive agent be conductive black,
The mixture of electrically conductive graphite and carbon nano-fiber, positive electrode binder is Kynoar, and the mass percent of each component is：Positive pole
Active material 93%, positive conductive agent 3% (wherein conductive black 1%, electrically conductive graphite 1%, carbon nano-fiber 1%), with positive pole
Binding agent 4%.
Plus plate current-collecting body has the aluminium foil of the first conductive coating and the second conductive coating, aluminum foil thickness before coating for coated on both sides
It is 15 μm.
Wherein the first conductive coating is the mixture of conductive black and Kynoar, the quality percentage of each component in coating
Than for：Conductive black 90%, Kynoar 10%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 1.5 μ
m。
Wherein the second conductive coating is the mixture of polyaniline and Kynoar, the mass percent of each component in coating
For：Polyaniline 92%, Kynoar 8%, the coating unilateral loads amount is 0.5g/m2, unilateral maximum gauge is 1 μm.
Negative electrode active material is the mixture of Delanium and nano-silicon, and cathode conductive agent is conductive black, electrically conductive graphite
With the mixture of carbon nano-fiber, negative electrode binder is the mixture of carboxylic cellulose formiate sodium and butadiene-styrene rubber, the matter of each component
Measuring percentage is：Negative electrode active material 93% (wherein Delanium 90%, nano-silicon 3%), cathode conductive agent 4% (is wherein led
Electric carbon black 1%, electrically conductive graphite 1%, carbon nano-fiber 1%), (the wherein carboxylic cellulose formiate sodium 1%, butylbenzene of negative electrode binder 4%
Rubber 3%).
Negative current collector is electrolytic copper foil, and copper thickness is 10 μm.
Barrier film has the individual layer PP material barrier films of alumina ceramic coating for dual coating.
Solvent in electrolyte is by ethylene carbonate, dimethyl carbonate, fluorinated ethylene carbonate according to volume ratio 30:60:
10 compositions, electrolyte is the LiPF of 1mol/L6, additive is the LiBOB of 0.1mol/L.
Comparative example 1, material therefor is same as Example 1 with proportioning, and it is uncoated not to be all plus plate current-collecting body used uniquely
The aluminium foil of conductive coating.
Comparative example 2, in addition to the first conductive coating, material therefor is same as Example 1 with proportioning；Its first conductive coating is
The mixture of polyaniline and Kynoar, the mass percent of each component is in coating：Polyaniline 95%, Kynoar
5%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 2 μm.
Comparative example 3, in addition to the first conductive coating and the second conductive coating, material therefor is same as Example 1 with proportioning；Its
First conductive coating is the mixture of polyaniline and Kynoar, and the mass percent of each component is in coating：Polyaniline
95%, Kynoar 5%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 2 μm；Its second conductive coating
It is Graphene and the mixture of Kynoar, the mass percent of each component is in coating：Graphene 95%, Kynoar
5%, the coating unilateral loads amount is 0.5g/m2, unilateral maximum gauge is 1 μm.Comparative example 4, material therefor and proportioning and implementation
Example 2 is identical, and it is the aluminium foil for being only coated with the first conductive coating not to be all plus plate current-collecting body used uniquely.
Comparative example 5, in addition to the first conductive coating and the second conductive coating, material therefor is same as Example 2 with proportioning；Its
First conductive coating is the mixture of conductive black and polyvinyl alcohol, and the mass percent of each component is in coating：Conductive black
88%, polyvinyl alcohol 12%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 1.5 μm；Its second conductive painting
Layer is polyaniline and the mixture of polyvinyl alcohol, and the mass percent of each component is in coating：Polyaniline 88%, polyvinyl alcohol
12%, the coating unilateral loads amount is 0.5g/m2, unilateral maximum gauge is 1 μm.
Comparative example 6, in addition to the second conductive coating, material therefor is same as Example 2 with proportioning；Its second conductive coating is
The mixture of polypyrrole and Kynoar, the mass percent of each component is in coating：Polypyrrole 88%, Kynoar
12%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 1.5 μm.
Comparative example 7, in addition to the second conductive coating, material therefor is same as Example 2 with proportioning；Its second conductive coating is
The mixture of multi-walled carbon nano-tubes and Kynoar, the mass percent of each component is in coating：Multi-walled carbon nano-tubes
83.3%, Kynoar 16.7%, the coating unilateral loads amount is 1.0g/m2, unilateral maximum gauge is 2 μm.
At room temperature, by embodiment 1, embodiment 2, comparative example 1, comparative example 2, comparative example 3, comparative example 4, comparative example 5, contrast
Example 6 is fabricated to 8Ah soft-package batteries respectively with comparative example 7, and the DC internal resistance of each battery is measured after half electric state is discharged to.Table 1 is
Internal resistance of cell test result.
Table 1, internal resistance of cell test result
| Battery DC internal resistance/m Ω | |
| Embodiment 1 | 10.03 |
| Embodiment 2 | 10.19 |
| Comparative example 1 | 15.15 |
| Comparative example 2 | 11.15 |
| Comparative example 3 | 11.13 |
| Comparative example 4 | 11.02 |
| Comparative example 5 | 11.37 |
| Comparative example 6 | 10.22 |
| Comparative example 7 | 9.77 |
As seen from Table 1, the internal resistance of cell of embodiment 1 is significantly less than in the battery of comparative example 1, comparative example 2 and comparative example 3
Resistance, the internal resistance of cell of embodiment 2 is significantly less than the internal resistance of cell of comparative example 4 and comparative example 5.The internal resistance of cell reduces, and is conducive to subtracting
Baby battery polarizes.
At room temperature, by the battery of embodiment 1 and the battery of comparative example 1, comparative example 2 and the battery of comparative example 3 respectively in 2.5~4.6V
Under, high rate performance test is carried out, the results are shown in Table 2.
Table 2, high rate performance correction data
| Discharge-rate | Discharge capacity/Ah | Discharge capacity/Ah | Discharge capacity/Ah | Discharge capacity/Ah |
| Embodiment 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| 0.3C | 8.228 | 8.239 | 8.225 | 8.137 |
| 1C | 7.822 | 7.471 | 7.455 | 7.508 |
| 2C | 7.204 | 6.190 | 5.909 | 6.272 |
| 3C | 6.661 | 4.537 | 4.127 | 3.915 |
As seen from Table 2, discharge capacity of the battery of embodiment 1 under 1C, 2C, 3C multiplying power is apparently higher than the battery of comparative example 1, right
The battery of ratio 2 and the battery of comparative example 3.
At room temperature, by the battery of embodiment 2 and the battery of comparative example 4, the battery of comparative example 5, the battery of comparative example 6 and the electricity of comparative example 7
Pond under the conditions of 2.5~4.6V, 0.5C discharge and recharges, is circulated performance test respectively, the results are shown in Table 3.
Table 3, loop condition correction data
| Circulating cycle number | Capability retention/% | Capability retention/% | Capability retention/% | Capability retention/% | Capability retention/% |
| Embodiment 2 | Comparative example 4 | Comparative example 5 | Comparative example 6 | Comparative example 7 | |
| 50 | 95.6 | 94.8 | 87.6 | 94.3 | 94.3 |
| 100 | 88.5 | 81.7 | 15.5 | 85.2 | 82.0 |
| 200 | 77.2 | 55.5 | 12.5 | 68.3 | 57.9 |
As seen from Table 3, capability retention after the battery of embodiment 2 was circulated through 200 weeks is apparently higher than the battery of comparative example 4, right
The battery of ratio 5, the battery of comparative example 6 and the battery of comparative example 7.
With reference to above-mentioned data, the internal resistance of the lithium-rich manganese-based lithium ion battery prepared by the present invention is substantially reduced, and
Its high rate performance and cycle performance all significantly improve, and simple to operate, and preparation cost is low, can carry out industrialized production.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and changed.Therefore, the present invention is not limited to above-mentioned specific embodiment, and every those skilled in the art are at this
On the basis of invention it is done it is any conspicuously improved, replace or modification belongs to protection scope of the present invention.Additionally,
Although having used some specific terms in this specification, these terms merely for convenience of description, not to structure of the present invention
Into any limitation.
Claims (16)
1. a kind of lithium-rich manganese base material lithium ion cell positive, including plus plate current-collecting body and the positive pole being coated on plus plate current-collecting body
Material layer, the positive electrode material layer includes positive active material, it is characterised in that the positive active material is lithium-rich manganese-based material
Material, the plus plate current-collecting body is coated with the conducting base of the first conductive coating and the second conductive coating for surface, and described first leads
Electrocoat is the mixture of conductive agent and Kynoar, conductive agent be conductive black, electrically conductive graphite, CNT, Graphene,
One or more in carbon fiber, first conductive coating is covered in conducting base surface, is led in first conductive coating
Electric agent is (80~99) with the accounting of Kynoar:(1~20), second conductive coating is polyaniline and Kynoar
Mixture, second conductive coating is covered in the first conductive coating surface, in second conductive coating polyaniline with it is poly-
The accounting of vinylidene is (70~99):(1~30).
2. lithium ion cell positive according to claim 1, it is characterised in that the lithium-rich manganese base material formula is：
xLi2MnO3·(1-x)LiMO2, wherein, M is one or more in Co, Mn, Ni, Cr, Fe, Al, and 0<x<1.
3. lithium ion cell positive according to claim 1, it is characterised in that the conducting base is aluminium foil.
4. lithium ion cell positive according to claim 1, it is characterised in that the positive electrode material layer is also led including positive pole
One or more in electric agent, specially conductive black, electrically conductive graphite, CNT, Graphene, carbon fiber, polyaniline.
5. lithium ion cell positive according to claim 4, it is characterised in that the positive electrode material layer also includes just very viscous
Knot agent, specially carboxylic cellulose formiate sodium combine with butadiene-styrene rubber, in Kynoar, polytetrafluoroethylene (PTFE), polyacrylate
One or more.
6. lithium ion cell positive according to claim 5, it is characterised in that the quality percentage of each component in the positive pole
Content is：Positive electrode active materials 80~98%, positive conductive agent 1~10%, positive electrode binder 1~10%.
7. a kind of lithium ion cell positive according to claim 1, it is characterised in that on the plus plate current-collecting body first
Conductive coating load capacity is 0.1~10.0g/m2, coating layer thickness is 0.1~10 μm.
8. a kind of lithium-rich manganese base material lithium ion battery according to claim 1, it is characterised in that the plus plate current-collecting body
On the second conductive coating load capacity be 0.1~10.0g/m2, coating layer thickness is 0.1~10 μm.
9. the positive pole described in a kind of lithium ion battery, including claim any one of 1-8.
10. lithium ion battery according to claim 9, described negative also including negative pole, barrier film, electrolyte and packaging material
Pole includes negative current collector and the negative electrode material layer being coated on negative current collector, and the negative electrode material layer includes negative electrode active material
Matter, cathode conductive agent, negative electrode binder.
11. lithium ion batteries according to claim 10, it is characterised in that the negative electrode active material be Delanium,
One or more in native graphite, soft carbon, hard carbon, lithium titanate or silicon.
12. lithium ion batteries according to claim 10, it is characterised in that the cathode conductive agent is conductive black, leads
One or more in electro-graphitic, CNT, Graphene, carbon fiber.
13. lithium ion batteries according to claim 10, it is characterised in that the negative electrode binder is carboxylic cellulose formiate
Sodium is combined with butadiene-styrene rubber, one or more in Kynoar, polytetrafluoroethylene (PTFE), polyacrylate.
14. lithium ion batteries according to claim 10, it is characterised in that the barrier film is that single or double coating is aerobic
Change the individual layer PP materials or multilayer PE/PP composite barrier films of aluminium ceramic coating.
15. lithium ion batteries according to claim 10, it is characterised in that the electrolyte includes electrolyte solvent, electricity
Solution matter and additive, the electrolyte solvent are high voltage withstanding solvent, specially organic carbonate esters, organic carboxyl acid esters, fluorine
For one or more in esters, ethers, sulfone class；The electrolyte is LiPF6、LiBF4、Li(CF3SO2)2N、LiCF3SO3In
One or more；The additive is the organic matter of base class containing fluoro.
16. lithium ion batteries according to claim 10, it is characterised in that the packaging material are aluminum plastic film, aluminum hull, steel
One kind in shell or plastic housing.
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| CN109309191A (en) * | 2017-07-26 | 2019-02-05 | 成都特隆美储能技术有限公司 | A kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery |
| CN112467062A (en) * | 2020-11-02 | 2021-03-09 | 东莞市煜信恩能源科技有限公司 | Lithium battery surface coating process |
| CN114792807A (en) * | 2022-04-20 | 2022-07-26 | 江阴纳力新材料科技有限公司 | Positive lithium-rich composite current collector and preparation method thereof |
| CN115036453A (en) * | 2022-06-21 | 2022-09-09 | 天津力神电池股份有限公司 | Positive pole piece and lithium ion battery |
| WO2022206128A1 (en) * | 2021-03-30 | 2022-10-06 | 宁德新能源科技有限公司 | Electrochemical apparatus and electronic apparatus |
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| CN109309191A (en) * | 2017-07-26 | 2019-02-05 | 成都特隆美储能技术有限公司 | A kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery |
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| WO2022206128A1 (en) * | 2021-03-30 | 2022-10-06 | 宁德新能源科技有限公司 | Electrochemical apparatus and electronic apparatus |
| CN114792807A (en) * | 2022-04-20 | 2022-07-26 | 江阴纳力新材料科技有限公司 | Positive lithium-rich composite current collector and preparation method thereof |
| CN114792807B (en) * | 2022-04-20 | 2023-10-27 | 江阴纳力新材料科技有限公司 | Positive electrode lithium-rich composite current collector and preparation method thereof |
| CN115036453A (en) * | 2022-06-21 | 2022-09-09 | 天津力神电池股份有限公司 | Positive pole piece and lithium ion battery |
| CN117219890A (en) * | 2023-09-05 | 2023-12-12 | 苏州中源纳能科技有限公司 | Conductive coating material, conductive coating and secondary battery |
| CN117219890B (en) * | 2023-09-05 | 2024-05-03 | 苏州中源纳能科技有限公司 | Conductive coating material, conductive coating and secondary battery |
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