CN108281610B - Lithium ion battery with composite positive pole piece - Google Patents
Lithium ion battery with composite positive pole piece Download PDFInfo
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- CN108281610B CN108281610B CN201810043018.8A CN201810043018A CN108281610B CN 108281610 B CN108281610 B CN 108281610B CN 201810043018 A CN201810043018 A CN 201810043018A CN 108281610 B CN108281610 B CN 108281610B
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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
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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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- 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
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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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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a lithium ion battery with a composite positive pole piece, which comprises a negative pole piece, a positive pole piece and a diaphragm, wherein the negative pole piece, the positive pole piece and the diaphragm are wound or laminated at intervals, the negative pole piece is of a double-sided coating structure, the positive pole piece is of a double-sided coating structure, positive pole active material layers are coated on two sides of a positive pole current collector of the positive pole piece, the positive pole piece is arranged between every two adjacent negative pole pieces, the positive pole active material layer is of a composite layered structure and comprises a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, the lithium cobaltate material layer is coated on the surface of the positive pole current collector, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and anisotropic. The lithium ion battery of the composite positive pole piece has the characteristics of excellent rate capability, good high-low temperature performance, high safety, convenient processing and low cost.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a lithium ion battery with a composite positive pole piece.
Background
With the rapid development of informatization and intellectualization of modern society and the increasing severity of environmental pollution and energy shortage, the society has higher and higher requirements on the capacity and output power of storage devices, and lithium ion batteries, capacitors and the like become the current research hotspots. The lithium ion battery has the advantages of high energy density, low self-discharge rate and the like, but the rate performance is not ideal, the power density is low, the voltage range of the lithium ion battery is 3.0-4.1V, and when the voltage range is higher than 4.1V, the anode material and the electrolyte of the battery are unstable and easy to oxidize, and lithium is easy to separate from the surface of the cathode to form lithium dendrites, so that potential safety hazards are brought.
In order to overcome above defect, chinese utility model patent CN 204793030U discloses a mix positive pole piece and lithium ion power battery, should mix positive pole piece and include first positive pole layer, the anodal layer of second and anodal mass flow body layer, first positive pole layer and the anodal layer of second coating respectively at the negative and positive face of anodal mass flow body, first positive pole layer is the lithium iron phosphate anodal material layer, the anodal layer of second is the lithium manganate anodal material layer. This technical scheme has the characteristics that equipment suitability is strong, forms mixed positive pole piece through coating lithium iron phosphate positive material layer and lithium manganate positive material layer respectively at the negative side and the positive side of anodal mass flow body, need not to prepare lithium iron phosphate positive plate and lithium manganate positive plate respectively, has simplified lithium ion power battery and has convoluteed or range upon range of structure, directly can adopt current equipment to convolute or range upon range of, improve equipment suitability.
However, in practical production, the following disadvantages are present: if the first positive electrode layer and the second positive electrode layer are respectively arranged at two sides of the positive current collector, and copper foils are arranged between the first positive electrode layer and the second positive electrode layer at intervals, the advantage complementation of the two positive electrode materials is not facilitated; meanwhile, the method of arranging the anodes in different sides cannot combine the characteristics of more anode materials; in addition, the split side arrangement also needs to pay attention to the correspondence of the positive electrode in the winding process, and the winding core needs to be reworked and disassembled to be wound again by a little carelessness.
Disclosure of Invention
The invention aims to provide a lithium ion battery with a composite positive pole piece, which has the characteristics of excellent rate capability, good high-low temperature performance, high safety, convenient processing and low cost.
The invention can be realized by the following technical scheme:
the invention discloses a lithium ion battery with a composite positive pole piece, which comprises a negative pole piece, a positive pole piece and a diaphragm, wherein the negative pole piece, the positive pole piece and the diaphragm are wound or laminated at intervals, the diaphragm is arranged between the negative pole piece and the positive pole piece, the negative pole piece is of a double-sided coating structure, negative active material layers are coated on two sides of a negative current collector of the negative pole piece, the positive pole piece is of a double-sided coating structure, positive active material layers are coated on two sides of the positive current collector of the positive pole piece, the positive pole piece is arranged between the spaced negative pole pieces, the positive active material layers are of a composite layered structure, the positive active material layers comprise a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and an anisotropic conductive adhesive layer is coated among the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer.
Further, an anisotropic conductive adhesive layer is coated between the positive current collector and the lithium iron phosphate layer.
Further, the anisotropic conductive adhesive layer comprises conductive particles, aminated graphene, a binder and an additive, wherein the aminated graphene is dispersed in the anisotropic conductive adhesive layer. And the conductive particles are copper-plated plastic pellets. The aminated graphene forms a two-dimensional conductive network, and the conductive particles form point contact in different layered two-dimensional conductive networks, so that three-dimensional transmission is realized, and the excellent conductivity of the anisotropic conductive adhesive layer is ensured.
Further, the binder is a thermosetting resin, and the thermosetting resin is an ionic polymer resin and/or a radical polymer resin.
Further, the additive is a composition of white carbon black, graphite powder and molybdenum disulfide. The white carbon black, the graphite powder and the molybdenum disulfide have a good grinding increasing effect, so that the positive plate can be damaged on the anisotropic conductive adhesive layer reversely and positively in the rolling process, the mixing of different materials is avoided, the formation of layers among different materials is only finished, certain gradient power is formed, and the electrochemical performance of the battery is improved.
The radical polymerizable resin is an acryl novolac resin, a vinyl ester resin, or an acrylate.
Further, the lithium ion battery is designed in a winding structure, and the lithium ion battery designed in the winding structure further comprises a cylindrical shell.
Further, the lithium ion battery is designed to be of a laminated structure, and the lithium ion battery designed to be of the laminated structure further comprises a square aluminum-plastic film shell.
Further, the negative current collector is a copper foil.
Further, the diaphragm is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm.
Further, the negative electrode active material layer is a natural graphite material layer and/or an artificial graphite material layer.
The lithium ion battery with the composite positive pole piece has the following beneficial effects:
the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially arranged on the surface of the positive electrode current collector and are bonded with each other through the anisotropic conductive adhesive layer to form a composite layered structure, the conductivities of the lithium cobaltate, the lithium manganate and the lithium iron phosphate are sequentially decreased to form a certain gradient concentration, a heat gradient is formed in the high-rate discharge process, the heat gradient is transferred from the inside of the current collector along the outside of the positive electrode active material layer, the generated heat gradient is beneficial to accelerating the improvement of the conductivity of the lithium iron phosphate material, the influence of the lithium iron phosphate on the rate performance is avoided, and the rate performance of the battery is effectively improved;
secondly, the lithium cobaltate material layer is socially arranged inside the composite structure of the positive active material layer, lithium manganate with excellent low-temperature performance is arranged in the middle, lithium iron phosphate with excellent high-temperature performance is arranged on the outer side, and the lithium manganate material is used as a middle lithium ion transmission channel during low-temperature testing, so that the influence of low temperature on the performance of the battery is avoided, high-temperature-resistant lithium iron phosphate effectively guarantees the lithium manganate inside to avoid the dissolution of the lithium manganate caused by high temperature during high-temperature performance testing, and the lithium battery has better high-temperature performance;
thirdly, the safety is high, the lithium iron phosphate material with the best safety is arranged on the outermost side of the composite structure of the positive active material layer, the lithium cobaltate with the poor safety is arranged on the innermost side, the potential safety hazard of the lithium cobaltate at high temperature is effectively relieved by the lithium iron phosphate material layer, and the safety of the battery is improved;
fourthly, the processing is convenient, and the anisotropic conductive adhesive layer is arranged between the positive current collector and each positive material layer, so that a composite layered structure is formed, the stability of the positive active material layer is ensured, the characteristic of excellent conductivity of the anisotropic conductive adhesive layer is fully utilized, and the battery is ensured to have excellent electrochemical performance;
fifthly, the cost is low, the pole piece structure is optimized through the composite structure design, the winding is convenient, the reject ratio is high, and the manufacturing cost of the lithium ion battery with the composite positive pole piece is effectively reduced.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is provided for the product of the present invention with reference to the examples.
The invention discloses a lithium ion battery with a composite positive pole piece, which comprises a negative pole piece, a positive pole piece and a diaphragm, wherein the negative pole piece, the positive pole piece and the diaphragm are wound or laminated at intervals, the diaphragm is arranged between the negative pole piece and the positive pole piece, the negative pole piece is of a double-sided coating structure, negative active material layers are coated on two sides of a negative current collector of the negative pole piece, the positive pole piece is of a double-sided coating structure, positive active material layers are coated on two sides of the positive current collector of the positive pole piece, the positive pole piece is arranged between the spaced negative pole pieces, the positive active material layers are of a composite layered structure, the positive active material layers comprise a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and an anisotropic conductive adhesive layer is coated among the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer.
Further, an anisotropic conductive adhesive layer is coated between the positive current collector and the lithium iron phosphate layer.
Further, the anisotropic conductive adhesive layer comprises conductive particles, aminated graphene, a binder and an additive, wherein the aminated graphene is dispersed in the anisotropic conductive adhesive layer.
Further, the conductive particles are copper-plated plastic pellets.
Further, the binder is a thermosetting resin, and the thermosetting resin is an ionic polymer resin and/or a radical polymer resin.
Further, the additive is a composition of white carbon black, graphite powder and molybdenum disulfide.
The radical polymerizable resin is an acryl novolac resin, a vinyl ester resin, or an acrylate.
Further, the lithium ion battery is designed in a winding structure, and the lithium ion battery designed in the winding structure further comprises a cylindrical shell.
Further, the lithium ion battery is designed to be of a laminated structure, and the lithium ion battery designed to be of the laminated structure further comprises a square aluminum-plastic film shell.
Further, the negative current collector is a copper foil.
Further, the diaphragm is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm.
Further, the negative electrode active material layer is a natural graphite material layer and/or an artificial graphite material layer.
Example 1
The invention discloses a lithium ion battery with a composite positive pole piece, which comprises a negative pole piece, a positive pole piece and a diaphragm, wherein the negative pole piece, the positive pole piece and the diaphragm are wound or laminated at intervals, the diaphragm is arranged between the negative pole piece and the positive pole piece, the negative pole piece is of a double-sided coating structure, negative active material layers are coated on two sides of a negative current collector of the negative pole piece, the positive pole piece is of a double-sided coating structure, positive active material layers are coated on two sides of the positive current collector of the positive pole piece, the positive pole piece is arranged between the spaced negative pole pieces, the positive active material layers are of a composite layered structure, the positive active material layers comprise a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and an anisotropic conductive adhesive layer is coated among the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer.
In this embodiment, an anisotropic conductive adhesive layer is coated between the positive electrode current collector and the lithium iron phosphate layer. The anisotropic conductive adhesive layer comprises conductive particles, aminated graphene, a binder and an additive, wherein the aminated graphene is dispersed in the anisotropic conductive adhesive layer. The conductive particles are copper-plated plastic pellets. The binder is thermosetting resin, and the thermosetting resin is ionic polymer resin and/or free radical polymer resin. The additive is a composition of white carbon black, graphite powder and molybdenum disulfide. The radical polymerizable resin is acryloyl novolac resin or vinyl ester resin, acrylate. The lithium ion battery is designed to be of a winding structure, and the lithium ion battery of the winding structure further comprises a cylindrical shell. The negative current collector is a copper foil. The diaphragm is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm. The negative active material layer is a natural graphite material layer and/or an artificial graphite material layer.
Example 2
The invention discloses a lithium ion battery with a composite positive pole piece, which comprises a negative pole piece, a positive pole piece and a diaphragm, wherein the negative pole piece, the positive pole piece and the diaphragm are wound or laminated at intervals, the diaphragm is arranged between the negative pole piece and the positive pole piece, the negative pole piece is of a double-sided coating structure, negative active material layers are coated on two sides of a negative current collector of the negative pole piece, the positive pole piece is of a double-sided coating structure, positive active material layers are coated on two sides of the positive current collector of the positive pole piece, the positive pole piece is arranged between the spaced negative pole pieces, the positive active material layers are of a composite layered structure, the positive active material layers comprise a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and an anisotropic conductive adhesive layer is coated among the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer.
And an anisotropic conductive adhesive layer is coated between the positive current collector and the lithium iron phosphate layer. The anisotropic conductive adhesive layer comprises conductive particles, aminated graphene, a binder and an additive, wherein the aminated graphene is dispersed in the anisotropic conductive adhesive layer. The conductive particles are copper-plated plastic pellets. The binder is thermosetting resin, and the thermosetting resin is ionic polymer resin and/or free radical polymer resin. The additive is a composition of white carbon black, graphite powder and molybdenum disulfide. The radical polymerizable resin is acryloyl novolac resin or vinyl ester resin, acrylate. The lithium ion battery is designed to be of a laminated structure, and the lithium ion battery designed to be of the laminated structure further comprises a square aluminum-plastic film shell. The negative current collector is a copper foil. The diaphragm is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm. The negative active material layer is a natural graphite material layer and/or an artificial graphite material layer.
Comparative example 1
The only difference between comparative example 1 and example 1 is the absence of a layer of lithium cobaltate material.
Comparative example 2
The only difference between comparative example 2 and example 1 is that there is no lithium manganate material layer.
Comparative example 3
The only difference between comparative example 3 and example 1 is that there is no lithium iron phosphate material layer.
Comparative example 4
The only difference between comparative example 4 and example 1 is the absence of an anisotropic conductive adhesive layer.
In order to verify the technical effects of the present invention, 18650 cylindrical batteries of the same capacity prepared in example 1 and comparative examples 1 to 4 were subjected to the relevant tests, and the results of the relevant tests are shown in table 1:
table 1 results of performance testing
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; as will be readily apparent to those skilled in the art from the disclosure herein, the present invention may be practiced without these specific details; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a lithium ion battery of compound positive pole piece, includes negative pole piece, positive plate and diaphragm, negative pole piece, positive plate and diaphragm are separated each other and are convoluteed or range upon range of design, the diaphragm sets up between negative pole piece and positive plate, the negative pole piece is the double-sided coating structure, negative pole mass flow body both sides of negative pole piece have all been scribbled negative pole active material layer, the positive plate is the double-sided coating structure, the positive pole mass flow body two-sided all has been scribbled positive active material layer of positive plate, is equipped with positive plate, its characterized in that between the spaced negative pole piece: the positive active material layer is of a composite layered structure and comprises a lithium cobaltate material layer, a lithium manganate material layer and a lithium iron phosphate material layer, wherein the lithium cobaltate material layer is coated on the surface of the positive current collector, the lithium manganate material layer and the lithium iron phosphate material layer are sequentially coated on the surface of the lithium cobaltate material layer, and an anisotropic conductive adhesive layer is coated among the lithium cobaltate material layer, the lithium manganate material layer and the lithium iron phosphate material layer.
2. The lithium ion battery with the composite positive pole piece as claimed in claim 1, wherein: and an anisotropic conductive adhesive layer is coated between the positive current collector and the lithium iron phosphate layer.
3. The lithium ion battery of the composite positive electrode plate of claim 1 or 2, wherein: the anisotropic conductive adhesive layer comprises conductive particles, aminated graphene, a binder and an additive, wherein the aminated graphene is dispersed in the anisotropic conductive adhesive layer.
4. The lithium ion battery of composite positive pole piece according to claim 3, characterized in that: the conductive particles are copper-plated plastic pellets.
5. The lithium ion battery of composite positive pole piece according to claim 4, characterized in that: the binder is thermosetting resin, and the thermosetting resin is ionic polymer resin and/or free radical polymer resin.
6. The lithium ion battery of composite positive pole piece according to claim 4 or 5, characterized in that: the additive is a composition of white carbon black, graphite powder and molybdenum disulfide.
7. The lithium ion battery of composite positive pole piece according to claim 5, characterized in that: the radical polymerizable resin is acryloyl novolac resin or vinyl ester resin, acrylate.
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| CN201810043018.8A CN108281610B (en) | 2018-01-17 | 2018-01-17 | Lithium ion battery with composite positive pole piece |
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| CN201810043018.8A CN108281610B (en) | 2018-01-17 | 2018-01-17 | Lithium ion battery with composite positive pole piece |
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| CN108281610B true CN108281610B (en) | 2020-05-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111200110A (en) * | 2018-11-16 | 2020-05-26 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device |
| CN111416127B (en) * | 2020-03-30 | 2022-04-19 | 珠海冠宇动力电池有限公司 | Positive plate and preparation method and application thereof |
| CN112072070B (en) * | 2020-09-04 | 2022-06-14 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072069B (en) * | 2020-09-04 | 2022-05-06 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072068B (en) * | 2020-09-04 | 2022-04-22 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN114497468B (en) * | 2020-11-11 | 2023-07-14 | 比亚迪股份有限公司 | Lithium ion battery |
| CN113346047A (en) * | 2021-06-04 | 2021-09-03 | 江西安驰新能源科技有限公司 | Low-temperature lithium ion battery positive pole piece and preparation method thereof, and lithium ion battery |
| CN114361569A (en) * | 2022-01-06 | 2022-04-15 | 广州小鹏汽车科技有限公司 | Cylindrical battery, preparation method thereof and vehicle |
| WO2023184072A1 (en) * | 2022-03-28 | 2023-10-05 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| CN115132966B (en) * | 2022-09-01 | 2022-11-29 | 星恒电源股份有限公司 | Composite positive pole piece, preparation method thereof and sodium-ion battery |
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| CN102290245B (en) * | 2011-04-29 | 2012-11-21 | 深圳市惠程电气股份有限公司 | Polyimide capacitor battery and manufacturing method thereof |
| KR101783445B1 (en) * | 2015-03-17 | 2017-09-29 | 주식회사 엘지화학 | Multilayer-Structured Electrode and Lithium Secondary Battery Comprising The Same |
| KR102415749B1 (en) * | 2015-08-05 | 2022-07-01 | 삼성에스디아이 주식회사 | Flexible battery |
| CN105406131A (en) * | 2015-11-30 | 2016-03-16 | 李朝 | Capacitive type lithium-ion power battery with hybrid negative electrode plates |
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Effective date of registration: 20220223 Address after: Room 604, floor 1, courtyard 4, Wangjing East Road, Chaoyang District, Beijing 100102 Patentee after: Hengji nengmai New Energy Technology Co.,Ltd. Address before: 525000 No. two, No. 139, Guandu Road, Guangdong, Maoming Patentee before: GUANGDONG University OF PETROCHEMICAL TECHNOLOGY |
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