CN106816575A - Positive plate and lithium ion battery - Google Patents
Positive plate and lithium ion battery Download PDFInfo
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- CN106816575A CN106816575A CN201510853211.4A CN201510853211A CN106816575A CN 106816575 A CN106816575 A CN 106816575A CN 201510853211 A CN201510853211 A CN 201510853211A CN 106816575 A CN106816575 A CN 106816575A
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- Prior art keywords
- positive
- positive plate
- collecting body
- priming coat
- binding agent
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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
-
- 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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention provides a kind of positive plate and lithium ion battery.The positive plate includes：Plus plate current-collecting body；And positive pole diaphragm, on plus plate current-collecting body and including positive active material, the first conductive agent and the first binding agent.The positive plate also includes：Priming coat, is bonded between plus plate current-collecting body and positive pole diaphragm and by plus plate current-collecting body and positive pole diaphragm, and priming coat includes the second conductive agent, the second binding agent and silane coupler；There is hydroxyl in the surface of the plus plate current-collecting body.Positive plate of the invention can be on the premise of battery energy density and electrical property not be lost substantially, increase substantially the cohesive force between positive pole diaphragm and plus plate current-collecting body, the problems such as positive pole diaphragm occur and come off during circulation etc. is avoided, the security performance of lithium ion battery is improved.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of positive plate and lithium ion battery.
Background technology
Lithium ion battery is to energy density requirement more and more higher, it is therefore desirable to improve active material in pole piece
Content.The positive pole diaphragm of lithium ion battery is generally made up of positive active material, conductive agent, binding agent,
Improve the content of positive active material, it is necessary to reduce the consumption of conductive agent and binding agent, this can be very
The cohesive force between positive active material and collector (conventional aluminium foil) is reduced in big degree, is followed in battery
It is possible that the problem that is come off from collector of positive active material in ring, with security risk higher.
Coat on a current collector layer binder layer can improve to a certain extent positive pole diaphragm and collector it
Between cohesive force.But coated with adhesive layer can reduce the electric conductivity between positive pole diaphragm and collector, shadow
Ring charge-discharge magnification, cycle performance of lithium ion battery etc..Meanwhile, in order to take into account adhesive layer and afflux
The cohesive force between cohesive force and adhesive layer and positive pole diaphragm between body, in usual adhesive layer
Binding agent selects Kynoar (PVDF), and the cohesive force between PVDF and positive pole diaphragm is good, but
Its cohesive force between collector is still not good enough.
The content of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of positive plate and lithium from
Sub- battery, the positive plate can be on the premise of battery energy density and electrical property not be lost, significantly substantially
Degree improves the cohesive force between positive pole diaphragm and plus plate current-collecting body, it is to avoid positive pole occur during circulation etc.
The problems such as diaphragm comes off, improves the security performance of lithium ion battery.
In order to achieve the above object, in one aspect of the invention, the invention provides a kind of positive plate, its
Including：Plus plate current-collecting body；And positive pole diaphragm, on plus plate current-collecting body and including positive active material,
First conductive agent and the first binding agent.The positive plate also includes：Priming coat, positioned at plus plate current-collecting body
Be bonded and positive pole diaphragm between and by plus plate current-collecting body and positive pole diaphragm, priming coat include the second conductive agent,
Second binding agent and silane coupler；There is hydroxyl in the surface of the plus plate current-collecting body.
In another aspect of this invention, the invention provides a kind of lithium ion battery, it includes：Positive plate；
Negative plate；Barrier film, is interval between positive plate and negative plate；And electrolyte.The positive plate is
Described positive plate according to a first aspect of the present invention.
Relative to prior art, beneficial effects of the present invention are：
In positive plate of the invention, priming coat can be before battery energy density and electrical property not be lost
Put, increase substantially the cohesive force between positive pole diaphragm and plus plate current-collecting body, it is to avoid in processes such as circulations
In the problems such as there is positive pole diaphragm and come off, improve the security performance of lithium ion battery.
Brief description of the drawings
The structural representation of Fig. 1 positive plates of the invention；
The mechanism of action of the silane coupler in Fig. 2 positive plates of the invention in plus plate current-collecting body and priming coat
Schematic diagram.
Wherein, description of reference numerals is as follows：
A plus plate current-collecting bodies
B priming coats
C positive pole diaphragms
Specific embodiment
The following detailed description of positive plate of the invention and lithium ion battery.
Positive plate according to a first aspect of the present invention is illustrated first.
Reference picture 1, positive plate according to a first aspect of the present invention includes plus plate current-collecting body A and cathode film
Piece C.Positive pole diaphragm C be located at plus plate current-collecting body A on and including positive active material, the first conductive agent with
And first binding agent.The positive plate also includes priming coat B.Priming coat B be located at plus plate current-collecting body A and
It is bonded between positive pole diaphragm C and by plus plate current-collecting body A and positive pole diaphragm C.Priming coat B includes second
Conductive agent, the second binding agent and silane coupler.There is hydroxyl in the surface of the plus plate current-collecting body A.
In positive plate of the invention, the presence of priming coat B can increase substantially positive pole diaphragm C with just
Cohesive force between pole collector A.This be due to：First, the surface presence-OH of plus plate current-collecting body,
And the silane coupler in priming coat B is in minor amount of water, and (source of minor amount of water includes but is not limited to following form：
Absorbed after moisture, priming coat in electrolyte solvent or the raw material contact surrounding environment for preparing used by priming coat
Moisture present in surrounding environment, in cell manufacturing process addition allow priming coat B can contact it is micro
Moisture, the content of above-mentioned minor amount of water will not produce the influence for deteriorating to battery performance, and general control is in primary coat
Moisture is less than 1000ppm in layer) catalysis under can hydrolyze generation-OH, therefore can be with positive pole collection
- OH the effects that flow surface is present produce hydrogen bond, while also forming chemistry with part-OH dehydrating condensations
Key (reference picture 2), produces extremely strong cohesive force, greatly improve priming coat B and plus plate current-collecting body A it
Between cohesive force.Secondly, the second binding agent, therefore priming coat B and positive pole diaphragm are contained in priming coat B
There is good compatibility and cohesive force between C.In addition, also contain the second conductive agent in priming coat B,
Therefore priming coat B has high conductivity, will not reduce between positive pole diaphragm C and plus plate current-collecting body A
Electric conductivity.So as to priming coat B can be on the premise of battery energy density and electrical property not be lost, significantly
Degree improves the cohesive force between positive pole diaphragm C and plus plate current-collecting body A, it is to avoid occur during circulation etc.
The problems such as positive pole diaphragm C comes off, improves the security performance of lithium ion battery.
In positive plate described according to a first aspect of the present invention, the structural formula of silane coupler can be
Y(CH2)nSiR3, wherein n can be 0~5 in integer, Y can for chloro, amino, sulfydryl, epoxy radicals,
Glycidyl epoxide, vinyl, cyclohexylamino, urea groups, acryloxy, methacryloxy
Or NCO, R is methoxyl group, ethyoxyl, methoxy ethoxy or acetoxyl group.
In positive plate described according to a first aspect of the present invention, silane coupler may be selected from 3- aminopropyls three
Methoxy silane, 3- aminopropyl triethoxysilanes, vinyltrimethoxy silane, the ethoxy of vinyl three
Base silane, 3- glycidoxypropyltrimewasxysilanes, 3- cyclohexylamino propyl trimethoxy silicanes
In one or more.
In positive plate described according to a first aspect of the present invention, the plus plate current-collecting body may be selected from aluminium foil,
One kind in nickel foil, stainless steel foil.The metallic surfaces such as aluminium foil, nickel foil, stainless steel foil are easily and air
In the effect such as vapor form metal oxide, metal oxide is further anti-with vapor in air
Corresponding alkali should be generated, hence in so that the surface of plus plate current-collecting body has hydroxyl.
In positive plate described according to a first aspect of the present invention, the second conductive agent may be selected from acetylene black, lead
One or more in electric carbon black, carbon fiber (VGCF), CNT (CNTs), Ketjen black.
Conductive black may be selected from one or more in Super P, Super S, 350G.
In positive plate described according to a first aspect of the present invention, the second binding agent may be selected from Kynoar
(PVDF), one or more in polyacrylonitrile, polytetrafluoroethylene (PTFE), polyvinyl alcohol, polyurethane.
The weight average molecular weight of Kynoar can be 600,000~1,200,000.
In positive plate described according to a first aspect of the present invention, weight of second conductive agent in priming coat B
Amount percentage composition can be 20%~40%；Weight percentage of second binding agent in priming coat B can be
58%~78%；Weight percentage of the silane coupler in priming coat B can be 0.5%~3%.
In positive plate described according to a first aspect of the present invention, the thickness of priming coat B can be
2 μm~4 μm.
In positive plate described according to a first aspect of the present invention, positive active material may be selected from cobalt acid lithium,
One or more in LiMn2O4, lithium-nickel-manganese-cobalt material, LiFePO4.
In positive plate described according to a first aspect of the present invention, the first conductive agent may be selected from acetylene black, lead
One or more in electric carbon black, carbon fiber, CNT, Ketjen black.Conductive black may be selected from Super
One or more in P, Super S, 350G.
In positive plate described according to a first aspect of the present invention, the first binding agent may be selected from polyvinylidene fluoride
One or more in alkene, polyacrylonitrile, polytetrafluoroethylene (PTFE), polyvinyl alcohol, polyurethane.Polyvinylidene fluoride
The weight average molecular weight of alkene can be 600,000~1,200,000.
In positive plate described according to a first aspect of the present invention, the first binding agent and the second binding agent are preferred
Can be identical.For example, when first bonding agents and second bonding agents use Kynoar so that positive pole
Diaphragm C and priming coat B have good compatibility, so as to increase substantially positive pole diaphragm C in positive pole
Bonding force on collector A.But the invention is not restricted to this, the first binding agent and the second binding agent may not be used yet
Together, by the mutual entanglement of the strand of the first binding agent and the second binding agent by positive pole diaphragm C and positive pole
Collector A is bonded.
Secondly, lithium ion battery according to a second aspect of the present invention is illustrated.
Lithium ion battery according to a second aspect of the present invention includes：Positive plate；Negative plate；Barrier film,
Every between positive plate and negative plate；And electrolyte.Wherein, the positive plate is according to the present invention the
On the one hand the positive plate described in.
Next the embodiment and comparative example of positive plate of the invention and lithium ion battery are illustrated.Such as
In lower embodiment and comparative example, the silane coupler for being used is 3- aminopropyl trimethoxysilanes (Y=
Amino, n=3, R=methoxyl group, the silane coupler using the other structures referred in the present invention also can
Reach similar effect as follows).The weight average molecular weight of the PVDF binding agents for being used is 800,000~900,000.
Embodiment 1
(1) preparation of priming coat
By 30 the first conductive agent of weight portion acetylene blacks, 69 weight portion the second binding agent PVDF and solvent N-
Methyl pyrrolidone (NMP) is mixed and stirred for uniformly, adding 1 weight portion silane coupler and stirring equal
It is even to obtain priming coat slurry, priming coat slurry is applied to the tow sides of plus plate current-collecting body aluminium foil afterwards
On, the thickness for controlling the pulp layer of one side is 2~4 μm.
(2) preparation of positive plate
By positive active material cobalt acid lithium, the first binding agent PVDF, the first conductive agent Super P by weight
Than 95:2:3 are dissolved in solvent NMP and are mixed and stirred for uniformly being made anode sizing agent, solid in anode sizing agent
Content is 70%, and anode sizing agent is equably coated in the tow sides with priming coat slurry of aluminium foil afterwards
On, then by dry, roll squeezer compacting, obtain positive plate.
Embodiment 2
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), acetylene black is 30 weight portions, and PVDF is 68.5 weight portions, silane coupled
Agent is 1.5 weight portions.
Embodiment 3
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), acetylene black is 30 weight portions, and PVDF is 68 weight portions, silane coupler
It is 2 weight portions.
Embodiment 4
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), acetylene black is 30 weight portions, and PVDF is 67 weight portions, silane coupler
It is 3 weight portions.
Embodiment 5
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), acetylene black is 25 weight portions, and PVDF is 73.5 weight portions, silane coupled
Agent is 1.5 weight portions.
Comparative example 1
By positive active material cobalt acid lithium, binding agent PVDF, conductive agent Super P by weight 95:2:3
It is dissolved in solvent NMP and is mixed and stirred for uniformly being made anode sizing agent, solids content is in anode sizing agent
70%, anode sizing agent is equably coated on the tow sides of plus plate current-collecting body aluminium foil afterwards, then pass through
Dry, roll squeezer is compacted, and obtains positive plate.
Comparative example 2
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), silane coupler is added without, and acetylene black is 30 weight portions, PVDF is
70 weight portions.
Comparative example 3
Positive plate is prepared according to the method for embodiment 1, except following difference：
In step (1), PVDF is added without, and acetylene black is 30 weight portions, silane coupler is
70 weight portions.
Comparative example 4
By positive active material cobalt acid lithium, binding agent PVDF, conductive agent Super P by weight 95:2:3
Stand-by, the solids content in anode sizing agent that is mixed and stirred for uniformly being made anode sizing agent is dissolved in solvent NMP
It is 70%；Silane coupler is dissolved in the ethanol solution that ethanol is configured to silane coupler, silane is then used
The tow sides of the ethanol solution brushing plus plate current-collecting body aluminium foil of coupling agent；After silane coupler is dried,
Anode sizing agent is equably coated on the tow sides of the aluminium foil processed by silane coupler, then passed through
Dry, roll squeezer is compacted, and obtains positive plate.
The preparation of negative plate：By negative electrode active material Delanium, binding agent SBR emulsion, thickener carboxylic
Sodium carboxymethylcellulose pyce and conductive agent Super P are by weight 94:3:1.5:1.5 mix simultaneously with solvent deionized water
Stir and be made cathode size, solids content is 50% in cathode size, afterwards that cathode size is uniform
Be coated on the tow sides of negative current collector Copper Foil, then through drying, roll squeezer compacting, born
Pole piece.
The preparation of lithium ion battery：Conductive lug is welded on positive plate and negative plate respectively, using 14 μm
Polypropylene, polyethylene composite isolated film, positive plate, barrier film, negative plate are wound to form naked battery core,
(electrolyte is molten using the lithium hexafluorophosphate electrolyte solution containing 1M to encapsulate and inject electrolyte with aluminum plastic film again
Agent is ethylene carbonate/dimethyl carbonate/1,2- propylene carbonate=1:1:The mixed solvent of 1 (volume ratio)),
Carry out chemical conversion and aging afterwards, obtain growing the generous square flexible-packaged lithium for 130mm × 60mm × 4mm from
Sub- battery.
Finally provide the performance test process and test result of lithium ion battery.
(1) the cohesive force test of positive plate：
To the positive plate in comparative example and embodiment, the method peeled off using 180 degree is glued to positive plate
Knot power is characterized.
(2) the discharge performance test of lithium ion battery：
At 25 DEG C, with 0.5C constant-current charges to 4.2V, with 0.5C constant-current discharges to 3.0V, obtain
Discharge capacity at 25 DEG C of lithium ion battery.
At 25 DEG C, with 0.5C constant-current charges to 4.2V, adjustment test temperature is quiet by battery to 45 DEG C
Put 2h and reach target temperature to battery surface, afterwards at 45 DEG C, with 0.5C constant-current discharges to 3.0V,
Obtain the discharge capacity at 45 DEG C of lithium ion battery.
At 25 DEG C, with 0.5C constant-current charges to 4.2V, adjustment test temperature is quiet by battery to 60 DEG C
Put 2h and reach target temperature to battery surface, afterwards at 60 DEG C, with 0.5C constant-current discharges to 3.0V,
Obtain the discharge capacity at 60 DEG C of lithium ion battery.
At 25 DEG C, with 0.5C constant-current charges to 4.2V, adjustment test temperature is quiet by battery to -20 DEG C
Put 2h and reach target temperature to battery surface, afterwards at -20 DEG C, with 0.5C constant-current discharges to 3.0V,
Obtain the discharge capacity at -20 DEG C of lithium ion battery.
It is worth on the basis of the discharge capacity at 25 DEG C of lithium ion battery：100%.
(3) the high rate performance testing process of lithium ion battery：
At 25 DEG C, with 0.5C constant-current charges to 4.2V, afterwards with 4.2V constant-voltage charges to blanking voltage
It is 0.05C, is discharged to 3.0V by different discharge-rates (0.5C, 1C, 2C, 3C) respectively afterwards,
Obtain the discharge capacity under lithium ion battery difference discharge-rate.With the discharge capacity obtained by 0.5C electric discharges
On the basis of be worth：100%.
The performance test results of the embodiment 1-5 of table 1 and comparative example 1-4
As can be seen that positive plate of the invention can protected from the contrast of embodiment 1-5 and comparative example 1-4
On the premise of card lithium ion battery has good discharge performance and high rate performance, cathode film is increased substantially
Cohesive force between piece and plus plate current-collecting body.
Priming coat is not used in comparative example 1, therefore bond effect between positive pole diaphragm and aluminium foil is poor.
Although PVDF has been used in comparative example 2 as priming coat, due between PVDF and aluminium foil
Cohesive force it is still not good enough, therefore cause the bond effect between positive pole diaphragm and aluminium foil still poor.
Silane coupler is used in comparative example 3 as priming coat, silane coupler pair is used in comparative example 4
Aluminium foil is pre-processed, but because in silane coating coupling agent, silane coupler occurs anti-with aluminium foil
Should produce the structure of chemical bond, therefore interface binding intensity between silane coupling agent layer and aluminium foil is high, but
Be silane coupler after the reaction, the compatibility with anode sizing agent is relatively poor, thus next step coating
During anode sizing agent, anode sizing agent is difficult to be formed the one knot for mutually merging and producing with silane coupling agent layer
Structure, causes positive pole diaphragm poor with the interfacial adhesion effect of silane coupling agent layer, therefore ultimately result in cathode film
Bond effect between piece and current collector aluminum foil is still poor.
Claims (10)
1. a kind of positive plate, including：
Plus plate current-collecting body；And
Positive pole diaphragm, on plus plate current-collecting body and including positive active material, the first conductive agent and
One binding agent；
Characterized in that,
The positive plate also includes：
Priming coat, glues between plus plate current-collecting body and positive pole diaphragm and by plus plate current-collecting body and positive pole diaphragm
Connect, priming coat includes the second conductive agent, the second binding agent and silane coupler；
There is hydroxyl in the surface of the plus plate current-collecting body.
2. positive plate according to claim 1, it is characterised in that the structural formula of silane coupler is
Y(CH2)nSiR3, wherein n is the integer in 0~5, and Y is chloro, amino, sulfydryl, epoxy radicals, contracting
Water glyceryl epoxide, vinyl, cyclohexylamino, ureido-propyl, acryloxy, methacryloxypropyl
Base or NCO, R are methoxyl group, ethyoxyl, methoxy ethoxy or acetoxyl group.
3. positive plate according to claim 1 and 2, it is characterised in that silane coupler is selected from 3-
Aminopropyl trimethoxysilane, 3- aminopropyl triethoxysilanes, vinyltrimethoxy silane, ethene
Ethyl triethoxy silicane alkane, 3- glycidoxypropyltrimewasxysilanes, 3- cyclohexylamino propyl group front threes
One or more in TMOS.
4. positive plate according to claim 1, it is characterised in that the second conductive agent be selected from acetylene black,
One or more in conductive black, carbon fiber, CNT, Ketjen black.
5. positive plate according to claim 1, it is characterised in that the first binding agent and second is bonded
Agent is identical.
6. positive plate according to claim 1 or 5, it is characterised in that the second binding agent is selected from poly-
One or more in vinylidene, polyacrylonitrile, polytetrafluoroethylene (PTFE), polyvinyl alcohol, polyurethane.
7. positive plate according to claim 1, it is characterised in that
Weight percentage of second conductive agent in priming coat is 20%~40%；
Weight percentage of second binding agent in priming coat is 58%~78%；
Weight percentage of the silane coupler in priming coat is 0.5%~3%.
8. positive plate according to claim 1, it is characterised in that the plus plate current-collecting body is selected from aluminium
One kind in paper tinsel, nickel foil, stainless steel foil.
9. positive plate according to claim 1 or 5, it is characterised in that
Positive active material is selected from the one kind in cobalt acid lithium, LiMn2O4, lithium-nickel-manganese-cobalt material, LiFePO4
Or it is several；
First conductive agent is selected from acetylene black, conductive black, carbon fiber, CNT, Ketjen black
Plant or various；
First binding agent is selected from Kynoar, polyacrylonitrile, polytetrafluoroethylene (PTFE), polyvinyl alcohol, poly- ammonia
One or more in ester.
10. a kind of lithium ion battery, including：
Positive plate；
Negative plate；
Barrier film, is interval between positive plate and negative plate；And
Electrolyte；
Characterized in that,
The positive plate is the positive plate according to any one of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510853211.4A CN106816575A (en) | 2015-11-30 | 2015-11-30 | Positive plate and lithium ion battery |
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| CN201510853211.4A CN106816575A (en) | 2015-11-30 | 2015-11-30 | Positive plate and lithium ion battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244362A (en) * | 2018-11-05 | 2019-01-18 | 宁德新能源科技有限公司 | Anode pole piece, electrochemical appliance and the electronic device comprising it |
| CN111952668A (en) * | 2020-08-13 | 2020-11-17 | 梅州市量能新能源科技有限公司 | Electrolyte, lithium ion battery and preparation method thereof |
| CN113224262A (en) * | 2021-04-30 | 2021-08-06 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery |
| CN113675366A (en) * | 2018-11-05 | 2021-11-19 | 宁德新能源科技有限公司 | Positive electrode plate, electrochemical device and electronic device comprising same |
| CN113964452A (en) * | 2021-10-19 | 2022-01-21 | 宁德新能源科技有限公司 | Separator, electrochemical device, and electronic device |
| CN116072875A (en) * | 2023-03-07 | 2023-05-05 | 宁德新能源科技有限公司 | Positive electrode sheet, secondary battery, and electronic device |
| WO2023087301A1 (en) * | 2021-11-22 | 2023-05-25 | 东莞新能源科技有限公司 | Electrochemical apparatus and electronic device containing said electrochemical apparatus |
| WO2023206405A1 (en) * | 2022-04-29 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus |
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