CN108281610A - A kind of lithium ion battery of anode composite pole piece - Google Patents
A kind of lithium ion battery of anode composite pole piece Download PDFInfo
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- CN108281610A CN108281610A CN201810043018.8A CN201810043018A CN108281610A CN 108281610 A CN108281610 A CN 108281610A CN 201810043018 A CN201810043018 A CN 201810043018A CN 108281610 A CN108281610 A CN 108281610A
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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
- 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
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Abstract
The invention discloses a kind of lithium ion batteries of anode composite pole piece, including negative plate, positive plate and diaphragm, negative plate, positive plate and diaphragm is spaced winds or laminates design, negative plate is coated on both sides structure, positive plate is coated on both sides structure, the plus plate current-collecting body of positive plate is two-sided to be coated with anode active material layer, positive plate is equipped between the negative plate at interval, anode active material layer is straticulate structure, anode active material layer includes cobalt acid lithium material layer, lithium manganate material layer and LiFePO 4 material layer, cobalt acid lithium material layer is coated in plus plate current-collecting body surface, lithium manganate material layer, LiFePO 4 material layer is sequentially coated at cobalt acid lithium material surface, cobalt acid lithium material layer, lithium manganate material layer, Anisotyopic conductive adhesive layer is coated between LiFePO 4 material layer.The lithium ion battery of the anode composite pole piece of the present invention has the characteristics that high rate performance is excellent, high temperature performance is good, safe, easy to process and of low cost.
Description
Technical field
The present invention relates to battery technology field, specially a kind of lithium ion battery of anode composite pole piece.
Background technology
As modern society's informationization and intelligentized high speed development and environmental pollution and energy shortage are increasingly serious,
Society is higher and higher to the capacity and demanded power output of electrical storage device, and lithium ion battery and capacitor etc. become current research heat
Point.Lithium ion battery has the advantages that energy density is high, self-discharge rate is low etc., but high rate performance is undesirable, and power density is relatively low, and
And the voltage range of lithium ion battery is between 3. 0~4.1V, when being higher than 4.1V, cell positive material and electrolyte it is unstable,
Oxidizable, negative terminal surface easily analyses lithium and forms Li dendrite, brings security risk.
In order to overcome disadvantages described above, Chinese utility model patent CN 204793030U to disclose a kind of blended anode pole piece
And lithium-ion-power cell, the blended anode pole piece include the first anode layer, the second anode layer and plus plate current-collecting body layer, described the
One anode layer and the second anode layer are respectively coated on the back and sunny side of plus plate current-collecting body, and first anode layer is LiFePO4
Positive electrode material layer, second anode layer are manganate cathode material for lithium layer.The technical solution has the characteristics that equipment strong applicability,
By the back and sunny side shape that lithium iron phosphate positive material layer and manganate cathode material for lithium layer are respectively coated on plus plate current-collecting body
At blended anode pole piece lithium-ion-power cell is simplified without preparing iron phosphate lithium positive pole piece and lithium manganate anode slice respectively
The structure wound or laminated directly may be used existing equipment and be wound or be laminated, and improve equipment applicability.
But in practical application production, there is also following defects：Such as the first anode layer and the second anode layer separation anode
Collector both sides, between the two between across copper foil, be unfavorable for two kinds of positive electrodes and have complementary advantages；Meanwhile dividing side setting anode
Method, also can not be in conjunction with the characteristics of more positive electrodes；In addition, the correspondence it is also noted that anode is arranged in winding process in point side
Property, it is careless slightly, it is necessary to which that dismantling core of doing over again is rewound.
Invention content
The object of the present invention is to provide a kind of lithium ion battery of anode composite pole piece, height excellent with high rate performance
Good, safe, the easy to process and of low cost feature of warm nature energy.
The present invention can be achieved through the following technical solutions：
The invention discloses a kind of lithium ion battery of anode composite pole piece, including negative plate, positive plate and diaphragm, the cathode
Piece, positive plate and diaphragm is spaced winds or laminates design, the diaphragm is arranged between negative plate and positive plate, described negative
Pole piece is coated on both sides structure, and the negative current collector two sides of the negative plate is coated with anode active material layer, the positive plate
For coated on both sides structure, the plus plate current-collecting body of the positive plate is two-sided to be coated with anode active material layer, the negative plate at interval it
Between be equipped with positive plate, the anode active material layer be straticulate structure, the anode active material layer includes cobalt acid lithium material
The bed of material, lithium manganate material layer and LiFePO 4 material layer, the cobalt acid lithium material layer are coated in the plus plate current-collecting body surface, institute
State lithium manganate material layer, LiFePO 4 material layer is sequentially coated at the cobalt acid lithium material surface, the cobalt acid lithium material layer,
Anisotyopic conductive adhesive layer is coated between lithium manganate material layer, LiFePO 4 material layer.
Further, Anisotyopic conductive adhesive is coated between the plus plate current-collecting body and the ferric phosphate lithium layer
Layer.
Further, the Anisotyopic conductive adhesive layer includes conducting particles, amination graphene, binder and adds
Agent, the amination graphene is added to be dispersed in the Anisotyopic conductive adhesive layer., the conducting particles is copper facing
Plasticity bead.Amination graphene forms two-dimentional conductive network, and conducting particles forms point in different stratiform two dimension conductive networks
Contact ensure that Anisotyopic conductive adhesive layer has more excellent electric conductivity to realize that three-dimensional passes to.
Further, the binder is thermosetting resin, and the thermosetting resin is for ionic polymerization resin and/or certainly
By fundamental mode polymer resin.
Further, the additive is the composition of white carbon, graphite powder, molybdenum disulfide.White carbon, graphite powder and two
Molybdenum sulfide has preferable increasing mill effect, facilitates positive plate in nipping process anyway to the damage of Anisotyopic conductive adhesive layer
Wound, avoids the mixing between different materials, is that forming layer terminates between different materials, forms certain gradient power, improve
The chemical property of battery.
Further, the free-radical polymerised resin is acryloyl group novolac resin or vinylester resin propylene
Acid esters.
Further, the lithium ion battery is winding-structure structure design, the lithium-ion electric of the winding-structure design
Pond further includes cylindrical shell.
Further, the lithium ion battery is stepped construction structure design, the lithium-ion electric of the stepped construction design
Pond further includes rectangular aluminum plastic membrane shell.
Further, the negative current collector is copper foil.
Further, the diaphragm is PE diaphragms, PP diaphragms or PE/PP composite diaphragms.
Further, the anode active material layer is natural graphite material layer and and/or electrographite material layer.
A kind of lithium ion battery of anode composite pole piece of the present invention, has following advantageous effect：
The first, high rate performance is excellent, and cobalt acid lithium material layer, lithium manganate material layer and LiFePO 4 material layer are successively set on described
On plus plate current-collecting body surface, bond to form straticulate structure by Anisotyopic conductive adhesive layer each other, cobalt acid lithium,
The electric conductivity of LiMn2O4 and LiFePO4 is successively decreased successively, certain gradient concentration of formation, shape during high-multiplying power discharge
It at heat gradient, is transmitted along outside anode active material layer inside collector, the heat gradient of generation helps speed up phosphorus
The promotion of sour iron lithium material electric conductivity, avoids influence of the LiFePO4 for high rate performance, effectively increases the multiplying power of battery
Performance；
The second, high temperature performance is good, cobalt acid lithium material layer society in the inside of anode active material layer composite construction, low temperature properties
LiMn2O4 setting that can be excellent is in centre, and the excellent LiFePO4 of high-temperature behavior is arranged on the outside, the manganese when carrying out low-temperature test
Sour lithium material avoids influence of the low temperature for battery performance, when high-temperature behavior is tested as intermediate lithium ion transport channel
Heat safe LiFePO4 effectively forms the dissolving for ensureing and high temperature being avoided to cause LiMn2O4 to internal LiMn2O4, ensures lithium battery
With preferable high-temperature behavior；
It is third, safe, the best LiFePO 4 material of safety be arranged anode active material layer composite construction most
Outside is arranged the poor cobalt acid lithium of safety in penetralia, and LiFePO 4 material layer effectively slows down cobalt acid lithium in high temperature
Security risk improves the safety of battery；
4th, easy to process, it is arranged in plus plate current-collecting body and each positive electrode material layer by using Anisotyopic conductive adhesive layer
Between, to form straticulate structure, it both ensure that the stability of anode active material layer, and also taken full advantage of anisotropy
The excellent feature of Conductive adhesive layer electric conductivity ensure that battery has excellent chemical property；
5th, of low cost, by composite structural design, optimize pole piece structure, winding is convenient, and fraction defective the effectively reduces multiple
Close the manufacturing cost of the lithium ion battery of anode pole piece.
Specific implementation mode
In order that those skilled in the art will better understand the technical solution of the present invention, with reference to embodiment and to this
Invention product is described in further detail.
It is described the invention discloses a kind of lithium ion battery of anode composite pole piece, including negative plate, positive plate and diaphragm
Negative plate, positive plate and diaphragm is spaced winds or laminates design, the diaphragm is arranged between negative plate and positive plate, institute
It is coated on both sides structure to state negative plate, and the negative current collector two sides of the negative plate is coated with anode active material layer, it is described just
Pole piece is coated on both sides structure, and the plus plate current-collecting body of the positive plate is two-sided to be coated with anode active material layer, the cathode at interval
Positive plate is equipped between piece, the anode active material layer is straticulate structure, and the anode active material layer includes cobalt acid
Lithium material layer, lithium manganate material layer and LiFePO 4 material layer, the cobalt acid lithium material layer are coated in the anode collection body surface
Face, the lithium manganate material layer, LiFePO 4 material layer are sequentially coated at the cobalt acid lithium material surface, the cobalt acid lithium material
Anisotyopic conductive adhesive layer is coated between the bed of material, lithium manganate material layer, LiFePO 4 material layer.
Further, Anisotyopic conductive adhesive is coated between the plus plate current-collecting body and the ferric phosphate lithium layer
Layer.
Further, the Anisotyopic conductive adhesive layer includes conducting particles, amination graphene, binder and adds
Agent, the amination graphene is added to be dispersed in the Anisotyopic conductive adhesive layer.
Further, the conducting particles is copper-plated plasticity bead.
Further, the binder is thermosetting resin, and the thermosetting resin is for ionic polymerization resin and/or certainly
By fundamental mode polymer resin.
Further, the additive is the composition of white carbon, graphite powder, molybdenum disulfide.
Further, the free-radical polymerised resin is acryloyl group novolac resin or vinylester resin propylene
Acid esters.
Further, the lithium ion battery is winding-structure structure design, the lithium-ion electric of the winding-structure design
Pond further includes cylindrical shell.
Further, the lithium ion battery is stepped construction structure design, the lithium-ion electric of the stepped construction design
Pond further includes rectangular aluminum plastic membrane shell.
Further, the negative current collector is copper foil.
Further, the diaphragm is PE diaphragms, PP diaphragms or PE/PP composite diaphragms.
Further, the anode active material layer is natural graphite material layer and and/or electrographite material layer.
Embodiment 1
The invention discloses a kind of lithium ion battery of anode composite pole piece, including negative plate, positive plate and diaphragm, the cathode
Piece, positive plate and diaphragm is spaced winds or laminates design, the diaphragm is arranged between negative plate and positive plate, described negative
Pole piece is coated on both sides structure, and the negative current collector two sides of the negative plate is coated with anode active material layer, the positive plate
For coated on both sides structure, the plus plate current-collecting body of the positive plate is two-sided to be coated with anode active material layer, the negative plate at interval it
Between be equipped with positive plate, the anode active material layer be straticulate structure, the anode active material layer includes cobalt acid lithium material
The bed of material, lithium manganate material layer and LiFePO 4 material layer, the cobalt acid lithium material layer are coated in the plus plate current-collecting body surface, institute
State lithium manganate material layer, LiFePO 4 material layer is sequentially coated at the cobalt acid lithium material surface, the cobalt acid lithium material layer,
Anisotyopic conductive adhesive layer is coated between lithium manganate material layer, LiFePO 4 material layer.
In the present embodiment, viscous coated with anisotropy conductiving glue between the plus plate current-collecting body and the ferric phosphate lithium layer
Oxidant layer.The Anisotyopic conductive adhesive layer includes conducting particles, amination graphene, binder and additive, the ammonia
Base graphite alkene is dispersed in the Anisotyopic conductive adhesive layer.The conducting particles is copper-plated plasticity bead.
The binder is thermosetting resin, and the thermosetting resin is ionic polymerization resin and/or radical-type polymerization resin.Institute
State the composition that additive is white carbon, graphite powder, molybdenum disulfide.The free-radical polymerised resin is that acryloyl group phenolic aldehyde is clear
Coating resins or vinylester resin acrylate.The lithium ion battery is winding-structure structure design, the winding-structure design
Lithium ion battery further include cylindrical shell.The negative current collector is copper foil.The diaphragm be PE diaphragms, PP diaphragms or
PE/PP composite diaphragms.The anode active material layer is natural graphite material layer and and/or electrographite material layer.
Embodiment 2
The invention discloses a kind of lithium ion battery of anode composite pole piece, including negative plate, positive plate and diaphragm, the cathode
Piece, positive plate and diaphragm is spaced winds or laminates design, the diaphragm is arranged between negative plate and positive plate, described negative
Pole piece is coated on both sides structure, and the negative current collector two sides of the negative plate is coated with anode active material layer, the positive plate
For coated on both sides structure, the plus plate current-collecting body of the positive plate is two-sided to be coated with anode active material layer, the negative plate at interval it
Between be equipped with positive plate, the anode active material layer be straticulate structure, the anode active material layer includes cobalt acid lithium material
The bed of material, lithium manganate material layer and LiFePO 4 material layer, the cobalt acid lithium material layer are coated in the plus plate current-collecting body surface, institute
State lithium manganate material layer, LiFePO 4 material layer is sequentially coated at the cobalt acid lithium material surface, the cobalt acid lithium material layer,
Anisotyopic conductive adhesive layer is coated between lithium manganate material layer, LiFePO 4 material layer.
Anisotyopic conductive adhesive layer is coated between the plus plate current-collecting body and the ferric phosphate lithium layer.It is described respectively to
Anisotropic conductive adhesive adhesive layer includes conducting particles, amination graphene, binder and additive, and the amination graphene has
It is dispersed in the Anisotyopic conductive adhesive layer.The conducting particles is copper-plated plasticity bead.The binder is heat
Thermosetting resin, the thermosetting resin are ionic polymerization resin and/or radical-type polymerization resin.The additive is hard charcoal
The composition of black, graphite powder, molybdenum disulfide.The free-radical polymerised resin is acryloyl group novolac resin or vinyl acetate
Resin acrylate.The lithium ion battery is stepped construction structure design, and the lithium ion battery of the stepped construction design is also
Including rectangular aluminum plastic membrane shell.The negative current collector is copper foil.The diaphragm be PE diaphragms, PP diaphragms or PE/PP it is compound every
Film.The anode active material layer is natural graphite material layer and and/or electrographite material layer.
Comparative example 1
Comparative example 1 and the unique difference of embodiment 1 are do not have cobalt acid lithium material layer.
Comparative example 2
Comparative example 2 and the unique difference of embodiment 1 are no lithium manganate material layer.
Comparative example 3
Comparative example 3 and the unique difference of embodiment 1 are no LiFePO 4 material layer.
Comparative example 4
Comparative example 4 and the unique difference of embodiment 1 are no Anisotyopic conductive adhesive layer.
In order to verify the technique effect of the present invention, embodiment 1, comparative example 1-4 are prepared as identical capacity respectively
18650 type cylindrical batteries carry out dependence test, and the results are shown in Table 1 for dependence test：
1 the performance test results of table
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the present invention in any form；All one's own professions
The those of ordinary skill of industry can be shown in by specification and described above and swimmingly implement the present invention；But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, makes a little using disclosed above technology contents
Perhaps the equivalent variations of variation, modification and evolution are the equivalent embodiment of the present invention；Meanwhile all substantive skills according to the present invention
Art still falls within technical scheme of the present invention to the variation, modification and evolution etc. of any equivalent variations made by above example
Protection domain within.
Claims (7)
1. a kind of lithium ion battery of anode composite pole piece, including negative plate, positive plate and diaphragm, the negative plate, positive plate
With diaphragm is spaced winds or laminates design, the diaphragm is arranged between negative plate and positive plate, and the negative plate is double
The negative current collector two sides of topcoat constructions, the negative plate is coated with anode active material layer, and the positive plate is two-sided painting
Layer structure, the plus plate current-collecting body of the positive plate is two-sided to be coated with anode active material layer, is equipped with just between the negative plate at interval
Pole piece, it is characterised in that：The anode active material layer is straticulate structure, and the anode active material layer includes cobalt acid lithium
Material layer, lithium manganate material layer and LiFePO 4 material layer, the cobalt acid lithium material layer are coated in the plus plate current-collecting body surface,
The lithium manganate material layer, LiFePO 4 material layer are sequentially coated at the cobalt acid lithium material surface, the cobalt acid lithium material
Layer is coated with Anisotyopic conductive adhesive layer between lithium manganate material layer, LiFePO 4 material layer.
2. the lithium ion battery of anode composite pole piece according to claim 1, it is characterised in that：The plus plate current-collecting body and
Anisotyopic conductive adhesive layer is coated between the ferric phosphate lithium layer.
3. the lithium ion battery of anode composite pole piece according to claim 1 or 2, it is characterised in that：The anisotropy
Conductive adhesive layer includes conducting particles, amination graphene, binder and additive, and the amination graphene has dispersion
In the Anisotyopic conductive adhesive layer.
4. the lithium ion battery of anode composite pole piece according to claim 3, it is characterised in that：The conducting particles is plating
The plasticity bead of copper.
5. the lithium ion battery of anode composite pole piece according to claim 4, it is characterised in that：The binder is thermosetting
Property resin, the thermosetting resin be ionic polymerization resin and/or radical-type polymerization resin.
6. the lithium ion battery of anode composite pole piece according to claim 4 or 5, it is characterised in that：The additive is
The composition of white carbon, graphite powder, molybdenum disulfide.
7. the lithium ion battery of anode composite pole piece according to claim 5, it is characterised in that：The free radical polymerization
Property resin be acryloyl group novolac resin or vinylester 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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| 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 |
| CN111416127A (en) * | 2020-03-30 | 2020-07-14 | 珠海冠宇动力电池有限公司 | Positive plate and preparation method and application thereof |
| CN112072070A (en) * | 2020-09-04 | 2020-12-11 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072068A (en) * | 2020-09-04 | 2020-12-11 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072069A (en) * | 2020-09-04 | 2020-12-11 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| 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 |
| CN114497468A (en) * | 2020-11-11 | 2022-05-13 | 比亚迪股份有限公司 | Lithium ion battery |
| CN115132966A (en) * | 2022-09-01 | 2022-09-30 | 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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| 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 |
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| CN112072070A (en) * | 2020-09-04 | 2020-12-11 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072068A (en) * | 2020-09-04 | 2020-12-11 | 珠海冠宇电池股份有限公司 | Positive pole piece and lithium ion battery comprising same |
| CN112072069A (en) * | 2020-09-04 | 2020-12-11 | 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 |
| CN114497468A (en) * | 2020-11-11 | 2022-05-13 | 比亚迪股份有限公司 | Lithium ion battery |
| 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 |
| CN115132966A (en) * | 2022-09-01 | 2022-09-30 | 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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| CN108281610B (en) | 2020-05-05 |
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