CN111509189A - Positive pole piece and lithium ion battery - Google Patents
Positive pole piece and lithium ion battery Download PDFInfo
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- CN111509189A CN111509189A CN201910092799.4A CN201910092799A CN111509189A CN 111509189 A CN111509189 A CN 111509189A CN 201910092799 A CN201910092799 A CN 201910092799A CN 111509189 A CN111509189 A CN 111509189A
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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
- 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
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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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
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Abstract
In order to solve the problems of powder falling of a ceramic diaphragm and insufficient battery rate performance of the conventional lithium ion battery, the invention provides a positive pole piece which comprises a positive pole material layer, an inorganic material layer and a polymer layer, wherein the inorganic material layer is attached to the surface of the positive pole material layer, and the polymer layer is attached to the surface of the inorganic material layer. Meanwhile, the invention also discloses a lithium ion battery comprising the positive pole piece. The positive pole piece provided by the invention is beneficial to improving the safety, stability and rate capability of the battery.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a positive pole piece and a lithium ion battery.
Background
The lithium ion battery has the advantages of high energy density, large output power, long cycle life, no memory effect, small self-discharge rate, environmental protection and the like, is obviously superior to other traditional secondary batteries in comprehensive performance, and is an ideal power supply for various consumer electronic equipment and electric automobiles.
With the increasing exhaustion of fossil energy and the gradual deterioration of the global environment, the development of novel clean energy and the enhancement of energy conservation and emission reduction become common knowledge of governments and enterprises of all countries in the world. In recent years, the construction pace of electric automobiles and new energy (solar energy and wind power) projects is accelerated, and a high-performance lithium ion battery becomes one of core technologies for vigorous development. With the rapid development of the terminal application field, various requirements of the lithium ion battery such as capacity, power, service life, cost, safety and the like are continuously improved. In particular, in order to meet the requirements of higher driving mileage, higher charging speed and higher safety in the rapid development of the new energy automobile field, people propose various technical schemes to improve the energy density, the quick charging performance and the safety of the lithium ion battery.
Coating a layer of inorganic ceramic material on the surface of a traditional polyolefin diaphragm gradually becomes a common method for improving the safety of a lithium ion battery. The surface of the diaphragm is coated with a ceramic layer, such as aluminum oxide, so that the oxidation of the anode to the diaphragm can be relieved, the strength of the diaphragm is enhanced, and the shrinkage rate of the diaphragm is reduced, so that the possibility of short circuit and thermal runaway in a battery is reduced.
In the aspect of improving the rate performance of the battery, increasing the content of the conductive agent is a common scheme. Materials such as carbon nanotubes and graphene are used as the conductive agent, although the addition amount of the conductive agent can be reduced to a certain extent, and the energy density and the rate capability of the lithium ion battery are improved. However, the improvement effect is limited, and the resistance of the solid-liquid interface between the positive electrode material and the electrolyte is not improved.
Disclosure of Invention
The invention provides a positive pole piece and a lithium ion battery, aiming at the problems of powder falling of a ceramic diaphragm and insufficient battery multiplying power performance of the conventional lithium ion battery.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, an embodiment of the present invention provides a positive electrode plate, including a positive electrode material layer, an inorganic material layer and a polymer layer, where the inorganic material layer is attached to a surface of the positive electrode material layer, and the polymer layer is attached to a surface of the inorganic material layer.
Optionally, the inorganic material layer comprises L i2S-P2S5、Li2S-GeS2、Li2S-SiS2、Li2S-GeS2-P2S5、Li7La3Zr2O12And L i3xLa2/3.xTiO3Wherein, 0<x<0.16。
Optionally, the polymer layer is a conductive polymer, and the polymer layer includes one or more of polyaniline, polypyrrole, and poly (3, 4-ethylenedioxythiophene).
Optionally, the thickness of the inorganic material layer is 1-10 um.
Optionally, the thickness of the polymer layer is 1-10 um.
Optionally, the positive electrode plate further includes a positive current collector, and the positive material layer is attached to the positive current collector.
Optionally, the positive electrode material layer includes a positive electrode active material, a positive electrode conductive agent, and a positive electrode binder, which are mixed with each other.
Optionally, the positive active material includes one or more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium iron phosphate, lithium manganese oxide, and a lithium-rich manganese-based material.
Optionally, the positive electrode conductive agent includes one or more of carbon nanotubes, conductive carbon black, acetylene black, graphene, and graphite.
Optionally, the positive electrode binder includes one or more of polyvinylidene fluoride, polytetrafluoroethylene, polyvinyl alcohol, polyacrylic acid, and polyimide.
Optionally, the positive electrode material layer comprises the following components by weight: 95-98% of positive active material, 0.01-1.5% of carbon nano tube, 1-2% of polyvinylidene fluoride and 0.5-1.5% of conductive carbon black, wherein the length of the carbon nano tube is more than or equal to 5 mu m.
On the other hand, the embodiment of the invention provides a lithium ion battery, which comprises electrolyte, a negative pole piece and the positive pole piece.
According to the positive pole piece provided by the invention, the inorganic material layer can effectively prevent the positive pole active material from directly contacting with the diaphragm, so that the oxidation of the positive pole active material to the diaphragm is inhibited, the lithium ion battery has excellent safety performance, the inorganic material layer is attached to the surface of the positive pole material layer, the problem of safety reduction caused by thermal shrinkage of the polymer diaphragm can be effectively solved, the polymer layer is attached to the surface of the inorganic material layer, the inorganic material layer can be effectively fixed on the surface of the positive pole material layer by the polymer layer, the inorganic material layer is prevented from falling off in the charge-discharge expansion process of the positive pole material layer, and the polymer layer and the inorganic material layer are effectively matched, so that the safety of the battery is improved, and the stability and the rate capability of the positive pole piece in charge-discharge circulation are improved.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention discloses a positive pole piece, which comprises a positive pole material layer, an inorganic material layer and a polymer layer, wherein the inorganic material layer is attached to the surface of the positive pole material layer, and the polymer layer is attached to the surface of the inorganic material layer.
According to the positive pole piece provided by the invention, the inorganic material layer can effectively prevent the positive pole active material from directly contacting with the diaphragm, so that the oxidation of the positive pole active material to the diaphragm is inhibited, the lithium ion battery has excellent safety performance, the inorganic material layer is attached to the surface of the positive pole material layer, the problem of safety reduction caused by thermal shrinkage of the polymer diaphragm can be effectively solved, the polymer layer is attached to the surface of the inorganic material layer, the inorganic material layer can be effectively fixed on the surface of the positive pole material layer by the polymer layer, the inorganic material layer is prevented from falling off in the charge-discharge expansion process of the positive pole material layer, and the polymer layer and the inorganic material layer are effectively matched, so that the safety of the battery is improved, and the stability and the rate capability of the positive pole piece in charge-discharge circulation are improved.
As a further improvement of the invention, the inorganic material layer is selected from inorganic materials with lithium ion conductivity, so that the safety is improved, the battery rate performance is improved, the influence of the inorganic material layer on the lithium ion conductivity between the anode plate and the electrolyte is avoided, and the lithium ion impedance of a solid-liquid interface is reduced.
Specifically, the inorganic material layer comprises L i2S-P2S5、Li2S-GeS2、Li2S-SiS2、Li2S-GeS2-P2S5、Li7La3Zr2O12(LL ZO) and L i3xLa2/3.xTiO3Wherein, 0<x<0.16。
The polymer layer can be selected from various conventional high molecular polymers so as to improve the adhesive capacity between the inorganic material layer and the anode material layer and avoid inorganic particles on the inorganic material layer from falling off.
As a further improvement of the invention, the polymer layer is a conductive polymer, and the conductive polymer can improve the interface conductivity of the positive pole piece, reduce the internal resistance of the positive pole piece and effectively improve the rate capability of the battery.
In particular, the polymer layer comprises one or more of polyaniline, polypyrrole, and poly (3, 4-ethylenedioxythiophene) (PEDOT).
In some embodiments, the inorganic material layer is attached to the surface of the positive electrode material layer in the form of a coating, specifically, the inorganic material layer may be formed by dispersing an inorganic material to prepare a slurry, and then spraying or roll coating the slurry on the surface of the positive electrode material layer to form the inorganic material layer, or the inorganic material layer may be spread in a powder form on the surface of the positive electrode material layer and then coated by a subsequent polymer layer to form a fixing.
Preferably, the thickness of the inorganic material layer is 1-10 um, and when the thickness of the inorganic material layer is too small, the safety performance of the lithium ion battery is improved weakly; when the thickness of the inorganic material layer is too large, the ion conductivity on the positive electrode plate is easily affected.
In some embodiments, the polymer layer is attached to the surface of the inorganic material layer in the form of a coating, and in particular, the polymer layer may be formed on the surface of the inorganic material layer by slurry coating or self-polymerization.
Preferably, the thickness of the polymer layer is 1-10 um, when the thickness of the polymer layer is too small, the requirement on the processing precision is high, and when the thickness of the polymer is too large, the ionic conductivity of the positive pole piece is easily influenced.
In some embodiments, the positive electrode sheet further comprises a positive electrode current collector, and the positive electrode material layer is attached to the positive electrode current collector.
The positive electrode material layer is obtained by coating and drying positive electrode slurry, the positive electrode slurry comprises components of the positive electrode material layer and a solvent for dispersing the components of the positive electrode material layer, the solvent can be an organic solvent, and specifically, the solvent can be N-methylpyrrolidone.
The positive current collector can adopt various metal materials with good conductivity.
In a more preferred embodiment, the positive electrode current collector is an aluminum foil.
In some embodiments, the positive electrode material layer includes a positive electrode active material, a positive electrode conductive agent, and a positive electrode binder mixed with each other.
The positive active material comprises one or more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium iron phosphate, lithium manganese oxide and a lithium-rich manganese-based material.
The positive electrode conductive agent comprises one or more of carbon nano tubes, conductive carbon black, acetylene black, graphene and graphite.
The positive electrode binder comprises one or more of polyvinylidene fluoride, polytetrafluoroethylene, polyvinyl alcohol, polyacrylic acid and polyimide.
In a preferred embodiment, the positive electrode material layer comprises the following components by weight: 95-98% of positive active material, 0.01-1.5% of carbon nano tube, 1-2% of polyvinylidene fluoride and 0.5-1.5% of conductive carbon black, wherein the length of the carbon nano tube is more than or equal to 5 mu m.
The invention further discloses a lithium ion battery, which comprises electrolyte, a negative pole piece and the positive pole piece.
In some embodiments, the lithium ion battery further comprises a separator between the negative pole piece and the positive pole piece.
The separator may be an existing polyolefin separator. The polyolefin diaphragm is a general diaphragm of a lithium ion battery and comprises a polypropylene (PP) diaphragm, a Polyethylene (PE) diaphragm, a PE/PP/PE three-layer diaphragm and the like.
In some embodiments, the negative electrode sheet comprises a negative electrode current collector and a negative electrode material layer, wherein the negative electrode material layer covers the negative electrode current collector.
The negative current collector can be made of various metal materials with good conductivity.
In a more preferred embodiment, the negative electrode current collector is a copper foil.
The negative electrode material layer includes a negative electrode active material, a negative electrode conductive agent, and a negative electrode binder.
The negative active material may be made of one or more of a carbon material, a metal alloy, a lithium-containing oxide, and a silicon-containing material.
The negative electrode conductive agent comprises one or more of carbon nano tubes, conductive carbon black, acetylene black, graphene and graphite.
The negative electrode binder comprises one or more of polyvinylidene fluoride, polytetrafluoroethylene, polyvinyl alcohol, polyacrylic acid and polyimide.
The present invention will be further illustrated by the following examples.
Example 1
The embodiment is used for explaining the positive pole piece, the lithium ion battery and the preparation method thereof, and the preparation method comprises the following operation steps:
(1) preparation of positive pole piece
Mixing the positive electrode active material L iNi0.83Co0.12Mn0.05O2Uniformly mixing the positive electrode slurry with conductive carbon black super-P, carbon nano tube CNT and adhesive PVDF according to the mass fraction of 97.5: 1.0: 0.5: 1.0, adding a proper amount of solvent N-methyl pyrrolidone (NMP), dispersing the mixture in a high-speed dispersion machine until the viscosity reaches 3000-6000 mPa.S to obtain positive electrode slurry, uniformly coating the positive electrode slurry on an aluminum foil current collector with the thickness of 12 mu m, drying, and coating a layer of inorganic material L i on the surface of a pole piece2S-P2S5And the thickness is 2um, an inorganic material layer is obtained by drying, a layer of conductive polymer material poly (3, 4-ethylenedioxythiophene) is coated on the surface of the pole piece, the thickness is 2um, a polymer layer is obtained by drying, and the positive pole piece is obtained by rolling and slitting.
(2) Preparation of negative pole piece
Uniformly mixing the anode active material artificial graphite, the conductive agent super-P, the adhesive Styrene Butadiene Rubber (SBR) and the dispersant sodium carboxymethyl cellulose (CMC) according to the mass ratio of 95.2:1.5:2.0:1.3, adding deionized water, and dispersing in a high-speed dispersion machine until the viscosity is 2000-5000 mPa.S to obtain anode slurry. And uniformly coating the negative electrode slurry on a copper foil current collector with the thickness of 6 mu m, and drying, rolling and slitting to obtain a negative electrode plate.
(3) Preparation of lithium ion battery
Respectively placing the positive pole piece and the negative pole piece on a winding machine, isolating the positive pole piece and the negative pole piece by adopting an isolating film, preparing a naked electric core in a winding mode, manufacturing a packaging bag by using an aluminum plastic film composite material, placing the naked electric core in the packaging bag for packaging to obtain a dry electric core, and obtaining the lithium ion battery after the dry electric core is subjected to the working procedures of baking, liquid injection, sealing, standing, formation, degassing packaging, capacity grading and the like.
Example 2
Embodiment 2 is used to illustrate the positive electrode plate, the lithium ion battery and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in embodiment 1, and the differences are as follows:
the positive active material adopts L iNi0.6Co0.2Mn0.2O2。
Example 3
Embodiment 3 is used to illustrate the positive electrode plate, the lithium ion battery and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in embodiment 1, and the differences are as follows:
the positive active material adopts L iNi0.5Co0.2Mn0.3O2。
Example 4
Embodiment 4 is used to illustrate the positive electrode plate, the lithium ion battery and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in embodiment 1, and the differences are as follows:
in the preparation step of the positive pole piece, L i is adopted2S-GeS2As the inorganic material layer.
Example 5
Embodiment 5 is used to illustrate the positive electrode plate, the lithium ion battery and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in embodiment 1, and the differences are as follows:
in the preparation step of the positive pole piece, L i is adopted7La3Zr2O12As the inorganic material layer.
Example 6
Embodiment 6 is used to illustrate the positive electrode plate, the lithium ion battery and the preparation method thereof disclosed by the present invention, and includes most of the operation steps in embodiment 1, and the differences are as follows:
the preparation method of the positive pole piece comprises the following steps: polypyrrole was used as the polymer layer.
Comparative example 1
The comparative example is used for comparative explanation of the positive pole piece, the lithium ion battery and the preparation method thereof disclosed by the invention, and comprises most of the operation steps in the example 1, and the differences are as follows:
the preparation method of the positive pole piece comprises the following steps:
mixing the positive electrode active material L iNi0.83Co0.12Mn0.05O2Uniformly mixing the positive electrode slurry with conductive carbon black super-P, carbon nano tube CNT and adhesive PVDF according to the mass fraction of 97.5: 1.0: 0.5: 1.0, adding a proper amount of solvent N-methyl pyrrolidone (NMP), dispersing the mixture in a high-speed dispersion machine until the viscosity reaches 3000-6000 mPa.S to obtain positive electrode slurry, uniformly coating the positive electrode slurry on an aluminum foil current collector with the thickness of 12 mu m, drying, and coating a layer of inorganic material L i on the surface of a pole piece2S-P2S5And the thickness is 2um, and the positive pole piece is obtained after drying, rolling and slitting.
Comparative example 2
The comparative example is used for comparative explanation of the positive pole piece, the lithium ion battery and the preparation method thereof disclosed by the invention, and comprises most of the operation steps in the example 1, and the differences are as follows:
the preparation method of the positive pole piece comprises the following steps:
mixing the positive electrode active material L iNi0.83Co0.12Mn0.05O2Mixing the conductive carbon black super-P, the carbon nano tube CNT and the PVDF binder according to the mass fraction of 97.5: 1.0: 0.5: 1.0, adding a proper amount of solvent N-methyl pyrrolidone (NMP), and dispersing in a high-speed dispersion machine until the viscosity is 3000-6000 mPa.S to obtain the anode slurry. And uniformly coating the positive electrode slurry on an aluminum foil current collector with the thickness of 12 mu m, drying, coating a layer of conductive polymer material poly (3, 4-ethylenedioxythiophene) with the thickness of 2 mu m on the surface of the electrode plate, drying, rolling and slitting to obtain the positive electrode plate.
Performance testing
The lithium ion batteries prepared in the above examples 1 to 6 and comparative examples 1 and 2 were subjected to the following performance tests:
the lithium ion batteries obtained in examples 1 to 6 and comparative examples 1 and 2 were charged to 4.2V at a constant current of 0.3C, then charged at a constant voltage to a current of 0.05C, and then discharged to 2.5V at a constant current of 0.3C in a thermostat at 25C, and the charge and discharge capacity and the first efficiency were recorded. Then each cell performs the following operations:
charging to 4.2V at a constant current of 1C, then charging at a constant voltage until the current is 0.05C, measuring a cell DCR, then discharging to 2.5V at a constant current of 1C, and recording the discharge capacity of the battery;
charging to 4.2V at a constant current of 1C, then charging at a constant voltage until the current is 0.05C, then discharging to 2.5V at a constant current of 2C, and recording the discharge capacity of the battery;
charging to 4.2V at a constant current of 1C, then charging at a constant voltage until the current is 0.05C, then discharging to 2.5V at a constant current of 3C, and recording the discharge capacity of the battery;
the sample was charged to 4.2V at a constant current of 1C, then charged at a constant voltage to a current of 0.05C, and then subjected to a needle-punching experiment.
Rate capacity retention (%) of lithium ion battery, xC discharge capacity/0.3C discharge capacity 100% (x 1,2,3)
The test results obtained are filled in Table 1.
TABLE 1
As can be seen from the test results in table 1, compared with the case where an inorganic material layer is separately disposed on a positive electrode material layer and a polymer layer is separately disposed on the positive electrode material layer, the lithium ion battery adopting the technical scheme of the present invention greatly improves the safety performance of the battery, reduces the risk of ignition of the battery due to needling, and simultaneously, the rate capability of the battery is significantly improved and the internal resistance is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. The positive pole piece is characterized by comprising a positive pole material layer, an inorganic material layer and a polymer layer, wherein the inorganic material layer is attached to the surface of the positive pole material layer, and the polymer layer is attached to the surface of the inorganic material layer.
2. The positive electrode sheet according to claim 1, wherein the inorganic material layer comprises L i2S-P2S5、Li2S-GeS2、Li2S-SiS2、Li2S-GeS2-P2S5、Li7La3Zr2O12And L i3xLa2/3.xTiO3Wherein, 0<x<0.16。
3. The positive electrode sheet according to claim 1, wherein the polymer layer is a conductive polymer, and the polymer layer comprises one or more of polyaniline, polypyrrole, and poly (3, 4-ethylenedioxythiophene).
4. The positive electrode plate as claimed in claim 1, wherein the inorganic material layer has a thickness of 1-10 um.
5. The positive electrode plate as claimed in claim 1, wherein the polymer layer has a thickness of 1-10 um.
6. The positive electrode plate of claim 1, further comprising a positive electrode current collector, wherein the positive electrode material layer is attached to the positive electrode current collector.
7. The positive electrode sheet according to claim 1, wherein the positive electrode material layer comprises a positive electrode active material, a positive electrode conductive agent and a positive electrode binder mixed with each other.
8. The positive electrode sheet according to claim 7, wherein the positive active material comprises one or more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium iron phosphate, lithium manganese oxide, and a lithium rich manganese-based material.
9. The positive electrode sheet according to claim 7, wherein the positive electrode conductive agent comprises one or more of carbon nanotubes, conductive carbon black, acetylene black, graphene, and graphite.
10. The positive electrode sheet according to claim 7, wherein the positive electrode binder comprises one or more of polyvinylidene fluoride, polytetrafluoroethylene, polyvinyl alcohol, polyacrylic acid, and polyimide.
11. The positive electrode sheet according to claim 7, wherein the positive electrode material layer comprises the following components by weight: 95-98% of positive active material, 0.01-1.5% of carbon nano tube, 1-2% of polyvinylidene fluoride and 0.5-1.5% of conductive carbon black, wherein the length of the carbon nano tube is more than or equal to 5 mu m.
12. A lithium ion battery comprising an electrolyte, a negative electrode sheet, and the positive electrode sheet according to any one of claims 1 to 11.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832186A (en) * | 2022-07-11 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery module, battery monomer, battery and power consumption device |
| CN116315459A (en) * | 2023-05-23 | 2023-06-23 | 宁德新能源科技有限公司 | Separator, electrochemical device, and electronic apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100003592A1 (en) * | 2007-02-13 | 2010-01-07 | Incorporated National University Iwate University | All solid state secondary battery |
| CN103219492A (en) * | 2013-04-09 | 2013-07-24 | 中南大学 | Manganese positive pole of modified lithium ion battery, and preparation method of manganese positive pole |
| CN103367712A (en) * | 2013-07-26 | 2013-10-23 | 合肥国轩高科动力能源股份公司 | Preparation method of lithium ion battery coating pole piece |
| CN103682356A (en) * | 2012-09-18 | 2014-03-26 | 华为技术有限公司 | Lithium ion battery anode material and preparation method thereof |
| CN104766946A (en) * | 2015-04-13 | 2015-07-08 | 湖南杉杉新能源有限公司 | Lithium ion battery positive pole piece, preparation method of positive pole piece and lithium ion battery |
| CN106229464A (en) * | 2016-07-27 | 2016-12-14 | 河南师范大学 | A kind of conductive polymer membrane and use the film modified anode pole piece of this conducting polymer |
| CN108933241A (en) * | 2018-07-09 | 2018-12-04 | 武汉艾特米克超能新材料科技有限公司 | A kind of positive electrode of double-coating and preparation method thereof, positive plate and lithium battery |
-
2019
- 2019-01-30 CN CN201910092799.4A patent/CN111509189A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100003592A1 (en) * | 2007-02-13 | 2010-01-07 | Incorporated National University Iwate University | All solid state secondary battery |
| CN103682356A (en) * | 2012-09-18 | 2014-03-26 | 华为技术有限公司 | Lithium ion battery anode material and preparation method thereof |
| CN103219492A (en) * | 2013-04-09 | 2013-07-24 | 中南大学 | Manganese positive pole of modified lithium ion battery, and preparation method of manganese positive pole |
| CN103367712A (en) * | 2013-07-26 | 2013-10-23 | 合肥国轩高科动力能源股份公司 | Preparation method of lithium ion battery coating pole piece |
| CN104766946A (en) * | 2015-04-13 | 2015-07-08 | 湖南杉杉新能源有限公司 | Lithium ion battery positive pole piece, preparation method of positive pole piece and lithium ion battery |
| CN106229464A (en) * | 2016-07-27 | 2016-12-14 | 河南师范大学 | A kind of conductive polymer membrane and use the film modified anode pole piece of this conducting polymer |
| CN108933241A (en) * | 2018-07-09 | 2018-12-04 | 武汉艾特米克超能新材料科技有限公司 | A kind of positive electrode of double-coating and preparation method thereof, positive plate and lithium battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832186A (en) * | 2022-07-11 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Battery module, battery monomer, battery and power consumption device |
| CN116315459A (en) * | 2023-05-23 | 2023-06-23 | 宁德新能源科技有限公司 | Separator, electrochemical device, and electronic apparatus |
| CN116315459B (en) * | 2023-05-23 | 2023-09-05 | 宁德新能源科技有限公司 | Separator, electrochemical device, and electronic apparatus |
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Application publication date: 20200807 |