CN110459723A - Battery diaphragm and preparation method thereof and battery with the battery diaphragm - Google Patents
Battery diaphragm and preparation method thereof and battery with the battery diaphragm Download PDFInfo
- Publication number
- CN110459723A CN110459723A CN201910724639.7A CN201910724639A CN110459723A CN 110459723 A CN110459723 A CN 110459723A CN 201910724639 A CN201910724639 A CN 201910724639A CN 110459723 A CN110459723 A CN 110459723A
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- Prior art keywords
- lithium
- battery
- containing compound
- battery diaphragm
- pole piece
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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 invention discloses a kind of battery diaphragms, and including the septum body being stacked and containing lithium coating, described containing having lithium-containing compound and binder in lithium coating, the lithium-containing compound is 80%~98% in the mass fraction containing in lithium coating.The invention also discloses a kind of preparation methods of battery diaphragm.The invention also discloses a kind of batteries with the battery diaphragm.
Description
Technical field
The present invention relates to technical field of energy storage, more particularly to a kind of battery diaphragm and preparation method thereof and have this
The battery of battery diaphragm.
Background technique
Now, demand of the people to pure electric automobile and electronic product is growing day by day, using lithium ion battery as the new of representative
Generation electrochemical cell is high with its energy density, voltage is high, have extended cycle life, big multiplying power discharging, self discharge are low, environmentally friendly etc. excellent
Gesture has been widely used in electric car and energy storage field.Electrochemical cell is by anode, cathode, diaphragm, electrolyte
Four big material compositions.Influence electrochemical cell performance major parameter be also more than four kinds of materials.Wherein, diaphragm in addition to play for
Ion (lithium ion in such as lithium ion battery) diffusion provides channel, completely cuts off outside the basic role that positive and negative anodes directly contact, also right
The security performance and electric conductivity of battery have great influence.
It currently, is to carry out ceramic coating processing to the common method that diaphragm is modified.Ceramic coating has excellent height
Warm stability, good hydrophily and liquid retention.Therefore, the diaphragm handled using ceramic coating, the thermal stability of battery are obtained
Performance to raising, wetting electrolytic liquid is improved.However, carrying out ceramic coating coating in membrane surface will affect lithium ion
Diffusion, especially diffusion under conditions of big multiplying power, so that the safety of battery and high rate performance be made to reduce.
Summary of the invention
Based on this, it is necessary to provide that a kind of humectation is strong, battery security and the high battery diaphragm and its system of high rate performance
Preparation Method and battery with the battery diaphragm.
A kind of battery diaphragm, it is described to contain in lithium coating with containing lithium including the septum body being stacked and containing lithium coating
Compound and binder, the lithium-containing compound are 80%~98% in the mass fraction containing in lithium coating.
The lithium-containing compound is selected from lithium zirconate, lithium phosphate, lithium aluminate, lithium fluoride, carbon in one of the embodiments,
Sour lithium, lithium oxalate and lithium metasilicate it is one or more.
The septum body is polyolefins diaphragm in one of the embodiments,.
The polyolefins diaphragm is selected from polyethylene diagrams, polypropylene diaphragm, polyethylene-in one of the embodiments,
One of polypropylene two-layer compound diaphragm, three layers of composite diaphragm of polypropylene-polyethylene-polypropylene and Kynoar diaphragm or
It is a variety of.
The binder is selected from polyacrylic acid, polyacrylamide, polyvinyl alcohol and gathers inclined fluorine in one of the embodiments,
Ethylene it is one or more.
The mass ratio of the lithium-containing compound and the binder is (80~98) in one of the embodiments: (2~
20)。
In one of the embodiments, it is described containing lithium coating with a thickness of 1 μm~10 μm.
The unilateral side or two sides that the septum body is set containing lithium coating in one of the embodiments,.
A kind of preparation method of the battery diaphragm, comprising:
Lithium-containing compound slurry is provided, the lithium-containing compound slurry includes the mixed uniformly lithium-containing compound, institute
State binder and dispersing agent；
The lithium-containing compound slurry is coated in the septum body；And
The diaphragm for being coated with the lithium-containing compound slurry is dried and removes the dispersing agent.
The temperature of the drying is 60 DEG C~95 DEG C in one of the embodiments,.
The lithium-containing compound in the lithium-containing compound slurry and the binder in one of the embodiments,
Gross mass percentage is 20%~50%.
A kind of battery, including anode pole piece, cathode pole piece, battery diaphragm and electrolyte, the battery diaphragm are arranged in institute
It states between anode pole piece and the cathode pole piece and the anode pole piece and the cathode pole piece is isolated, the electrolyte infiltration
The battery diaphragm, the anode pole piece and the cathode pole piece, the battery diaphragm are the battery diaphragm or are institute
The battery diaphragm that the preparation method stated is prepared.
Battery diaphragm of the invention is formed by adding in septum body containing lithium coating, and septum body itself can completely cut off
Electronics simultaneously makes metal ion, as lithium ion passes through.There is preferable close electrolyte property containing the lithium-containing compound in lithium coating, it can
Improve guarantor's liquid measure of battery.Also, relative to the diaphragm of traditional ceramic coating, what lithium-containing compound of the invention was formed contains lithium
Coating makes diaphragm have preferable lithium ion diffusion, can be improved the high rate performance of battery.Lithium-containing compound has height
Heat resistance, can be improved the thermal stability of battery.Therefore, pass through the coating in the surface of septum body progress lithium-containing compound
It is modified, guarantor's liquid measure of battery can be improved to improve the charge and discharge uniformity of battery, improve the cycle performance of battery；It can be improved
The heat resistance of battery is to have improvement result to the safety of battery；Ion-diffusibility can be improved to promote battery high current
Charging and discharging capabilities improve the high rate performance of battery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the battery diaphragm of one embodiment of the invention；
Fig. 2 is the structural schematic diagram of the battery diaphragm of another embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is further elaborated battery diaphragm of the invention and preparation method thereof and the battery with the battery diaphragm.
It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of battery diaphragm, the septum body 10 including being stacked and contain lithium
Coating 20, described containing having lithium-containing compound and binder in lithium coating 20, the lithium-containing compound contains lithium coating 20 described
In mass fraction be 80%~98%.
The battery diaphragm of the embodiment of the present invention is formed by adding in septum body 10 containing lithium coating 20, septum body 10
Itself it can completely cut off electronics and make metal ion, as lithium ion passes through.Have containing the lithium-containing compound in lithium coating 20 preferable
Guarantor's liquid measure of battery can be improved in close electrolyte property.Also, relative to the diaphragm of traditional ceramic coating, the embodiment of the present invention
Lithium-containing compound formed containing lithium coating 20 make diaphragm have preferable lithium ion diffusion, can be improved battery times
Rate performance.Lithium-containing compound has high heat resistance, can be improved the thermal stability of battery.Therefore, by septum body 10
Surface carry out lithium-containing compound it is coating modified after, can be improved battery guarantors liquid measure thus improve battery charge and discharge it is uniform
Property, improve the cycle performance of battery；The heat resistance of battery can be improved to have improvement result to the safety of battery；Can be improved from
Sub- diffusivity improves the high rate performance of battery to promote battery high current charge-discharge ability.
The main function of diaphragm in the battery is to separate the anode pole piece of battery with cathode pole piece, prevents the two poles of the earth from connecing
Touching and it is short-circuit, furthermore diaphragm also has the function of that electrolyte ion can be made to pass through, and forms the movable passageway of ion, make electrolyte from
Son moves between anode pole piece and cathode pole piece.In one embodiment, the septum body 10 can be polyolefins diaphragm,
Polyolefins diaphragm high mechanical strength, long service life, and there is good electrolyte resistance corrosivity.The polyolefins every
Film can be selected from polyethylene (PE) diaphragm, polypropylene diaphragm, polyethylene-polypropylene (PE/PC) two-layer compound diaphragm, polypropylene-
One of three layers of composite diaphragm of polyethylene-polypropylene (PE/PC/PE) and Kynoar diaphragm are a variety of.
In one embodiment, the lithium-containing compound is inorganic matter containing lithium, and the heat resistance of the inorganic matter containing lithium is stronger, is conducive to
Improve the service life of diaphragm and the security performance of battery.The inorganic matter containing lithium can be selected from lithium zirconate (Li2ZrO3), phosphoric acid
Lithium (Li3PO4), lithium aluminate (LiAlO2), lithium fluoride (LiF), lithium carbonate (Li2CO3), lithium oxalate (Li2C2O4) and lithium metasilicate
(Li2SiO3) it is one or more.
Binder both has bonding 20 component containing lithium coating, i.e., lithium-containing compound is bonded as one to the effect of formula coating,
Also has the function of bonding containing lithium coating 20 and septum body 10.In one embodiment, the binder can be selected from polypropylene
Sour (PAA), polyacrylamide, polyvinyl alcohol (PVA) and Kynoar (PVDF) it is one or more.
In one embodiment, lithium-containing compound is evenly distributed on graininess containing in lithium coating 20.Of lithium-containing compound
The shape of grain can be spherical or random polygon.Lithium-containing compound particle is set as spherical shape and is conducive to lithium-containing compound particle
Containing the accumulation in lithium coating 20.Containing in lithium coating 20, the mass ratio of lithium-containing compound and binder can be (80~98):
(2~20).In the quality than in range, enabling the structural stability containing lithium coating 20 to get well and making lithium-containing compound more preferable
It plays and improves guarantor's liquid measure of battery, improve the heat resistance of battery and improve the effect of ion-diffusibility.
In one embodiment, the overall thickness of the battery diaphragm can be 20 μm~30 μm, the thickness containing lithium coating 20
It can be 1 μm~10 μm.Thickness containing lithium coating 20 can require to carry out adaptability tune according to battery capacity and diaphragm overall thickness
It is whole.
Optionally, the unilateral side or two sides that the septum body 10 is set containing lithium coating 20.It is arranged containing lithium coating 20
It is described to be arranged towards the anode pole piece of battery containing lithium coating 20 at the unilateral side of the septum body 10, it can be with positive pole
Piece surface forms good adhesion effect, improves stability test.Referring to Fig. 2, described can be set containing lithium coating 20 in institute
State the two sides of septum body 10.
The embodiment of the present invention also provides the preparation method of battery diaphragm described in one kind, comprising:
S100, provides lithium-containing compound slurry, and the lithium-containing compound slurry includes mixed uniformly described containing lithiumation conjunction
Object, the binder and dispersing agent；
The lithium-containing compound slurry is coated in the septum body 10 by S200；And
S300, the diaphragm for being coated with the lithium-containing compound slurry are dried and remove the dispersing agent.
In the step s 100, the dispersing agent can for one of ethyl alcohol, acetone and N-Methyl pyrrolidone (NMP) or
It is a variety of.Solid content in lithium-containing compound slurry can be 20%~50%, i.e. the gross mass of lithium-containing compound and binder accounts for
The percentage of lithium-containing compound stock quality is 20%~50%.
In step s 200, coating method of the lithium-containing compound slurry in septum body 10 can be transfer coated, recessed
Version printing coating, dip-coating or extrusion coated.
In step S300, the temperature of the drying can be 60 DEG C~95 DEG C, preferably 75 DEG C~85 DEG C.
In one embodiment, the gross mass of the lithium-containing compound in the lithium-containing compound slurry and the binder
Percentage is 20%~50%.
The embodiment of the present invention also provides a kind of battery with the battery diaphragm, including anode pole piece, cathode pole piece, battery
Diaphragm and electrolyte, the battery diaphragm are arranged between the anode pole piece and the cathode pole piece and by the anode pole pieces
It is isolated with the cathode pole piece, the electrolyte infiltrates the battery diaphragm, the anode pole piece and the cathode pole piece, described
Battery diaphragm is above-mentioned battery diaphragm or is the battery diaphragm that above-mentioned preparation method obtains.
Electrochemical cell can be lithium ion battery etc..
The anode pole piece may include the plus plate current-collecting body and positive electrode material layer being stacked.
There is positive electrode active materials, conductive agent and binder in positive electrode material layer.It preferably, can also include thickener.
Positive electrode material layer can be obtained by the way that the slurry containing positive electrode to be coated on plus plate current-collecting body or heat dissipating layer.
Positive electrode slurry is positive electrode and the pulp-like mixture that volatile organic solvent is mixed to form.Implement one
In example, positive electrode slurry is coated in plus plate current-collecting body surface, is obtained just after drying in vacuum, protective gas or inert gas
Pole pole piece.Drying temperature can be dry (such as 30 DEG C~150 DEG C) for air drying or lower temperature.
The organic solvent, which is selected as, cannot dissolve the positive electrode, not chemically react with the positive electrode,
And the solvent that can be completely removed under lower temperature (such as 30 DEG C~150 DEG C), such as low molecular weight volatile organic solvent, it can
To be selected from N-Methyl pyrrolidone (NMP), methanol, ethyl alcohol, ethylene glycol, propyl alcohol, isopropanol, acetonitrile, acetone, ether, N, N diformazan
Base formamide (DMF), N, one of N dimethyl acetamide (DMAc) and tetrahydrofuran (THF) or more than one.
In one embodiment, electrochemical cell is lithium ion battery, and the positive electrode active materials and electrolyte contain lithium
Ion.The positive electrode active materials can be in cobalt acid lithium, LiFePO4, LiMn2O4 and ternary material, such as nickle cobalt lithium manganate
It is one or more.
In one embodiment, the conductive agent in positive electrode material layer can be selected from active carbon, graphene, carbon nanotube, section's qin
At least one of black, Super P (SP), acetylene black and graphite.Binder in positive electrode material layer can be selected from polyvinylidene fluoride
Alkene (PVDF), butadiene-styrene rubber (SBR), butadiene rubber, polyethylene glycol oxide (PEO), vinylidene fluoride-hexafluoropropylene copolymer
(PVDF-HFP), lauric acid acrylate (LA), polytetrafluoroethylene (PTFE) (PTFE), polyvinyl alcohol (PVA), epoxy resin, polypropylene
Acid at least one of (PAA) and sodium carboxymethylcellulose (CMC).The thickener is preferably sodium carboxymethylcellulose, hydroxyl second
Base cellulose, hydroxypropyl cellulose, diutan, chitosan and cross-linking type polysaccharide structures polymer, polyvinyl alcohol, in polyacrylic acid
It is at least one.In one embodiment, the content of the conductive agent can for positive electrode material layer gross mass 1.5% to
2.5%.The content of the binder is the 2% to 3% of the gross mass of positive electrode material layer.It is total that thickener can account for positive electrode material layer
The 0%~1.5% of quality.
The cathode pole piece may include the negative current collector and negative electrode material layer being stacked.
There is negative electrode active material, conductive agent and binder in the negative electrode material layer.It preferably, can also include thickening
Agent.Negative electrode material layer can be obtained by the way that the slurry containing negative electrode material to be coated on negative current collector or heat dissipating layer.Cathode
Material paste is negative electrode material and the pulp-like mixture that solvent is mixed to form.Solvent can be water.
In one embodiment, the negative electrode active material can selected from one of graphite, silicon carbon material and lithium titanate or
It is a variety of.The component and content of conductive agent, binder and thickener in the negative electrode material layer and positive electrode material layer can be distinguished
Identical or different, which is not described herein again.
The plus plate current-collecting body and negative current collector conduct electricity for supporting the positive electrode and negative electrode material respectively
Stream, shape can be paillon or netted.The material of the plus plate current-collecting body can be selected from aluminium, titanium, stainless steel, carbon cloth or carbon paper.
The material of the negative current collector can be selected from copper, nickel, stainless steel, carbon cloth or carbon paper.
The electrolyte is nonaqueous electrolytic solution, including solvent and is dissolved in the electrolyte of the solvent, the solvent can be selected from but
One of cyclic carbonate, linear carbonate, ring-type ethers, chain ethers, nitrile and amides or a variety of are not limited to, such as carbon
Vinyl acetate, propene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, methyl acetate, ethyl acetate, acetic acid third
Ester, methyl propionate, ethyl propionate, diethyl ether, acetonitrile, propionitrile, methyl phenyl ethers anisole, butyrate, glutaronitrile, dintrile, gamma-butyrolacton,
Gamma-valerolactone, tetrahydrofuran, 1,2- dimethoxy-ethane and one of acetonitrile and dimethylformamide or a variety of.
When electrochemical cell is lithium ion battery, the electrolyte is lithium salts, may be selected from but not limited to lithium chloride
(LiCl), lithium hexafluoro phosphate (LiPF6), LiBF4 (LiBF4), methanesulfonic acid lithium (LiCH3SO3), trifluoromethanesulfonic acid lithium
(LiCF3SO3), hexafluoroarsenate lithium (LiAsF6), lithium perchlorate (LiClO4) and one of di-oxalate lithium borate (LiBOB) or
It is a variety of.
Embodiment
Lithium-containing compound lithium aluminate and bonding agent PAA with the ratio of mass ratio 85:15 (lithium aluminate 1.5kg,
PAA0.26kg), it is added in dispersing agent acetone and carries out uniformly being mixed to get lithium-containing compound slurry, solid content is that 30% (acetone adds
Entering amount is 4.1kg).
By the way of dip-coating, using the PE diaphragm of 16 μ m-thicks as septum body 10, by lithium-containing compound slurry dual coating
In septum body 10.
The septum body 10 of lithium-containing compound slurry is coated with after oven dries (80 DEG C of temperature), obtain battery every
Film.Battery diaphragm contains 20 thickness of lithium coating between 4 μm~6 μm, and battery diaphragm overall thickness is between 20 μm~22 μm.
Above-mentioned battery diaphragm and anode pole piece, cathode pole piece and electrolyte are assembled into the Soft Roll electricity of model 406591
Pond, rated capacity 3Ah.Anode pole piece is used as positive electrode active materials using nickel-cobalt-manganese ternary material (NCM523), and cathode pole piece is adopted
Use graphite as negative electrode active material, electrolyte is LiPF containing 1mol/L6, 2% mass parts 1,3- propane sultone (PS) and
Ethylene carbonate-diethyl carbonate of 1% vinylene carbonate (VC)-methyl ethyl ester (EC-DEC-EMC) (volume ratio
1:1:1) electrolyte.
Comparative example
Comparative example is essentially identical with embodiment, difference be only that the battery diaphragm of comparative example be only septum body 10PE every
Film does not have and contains lithium coating 20.
The battery of embodiment and comparative example is carried out to guarantor's liquid measure, volume test, multiplying power test, circulation survey under the same conditions
Examination and hot abuse test.The result being repeated 3 times is as shown in table 1 below.
The different battery performance comparisons of table 1
Table 1 the result shows that, compared with the diaphragm not containing lithium coating 20, by septum body 10 be arranged containing lithium apply
Layer 20 enables to battery to have the ability of better wetting electrolytic liquid, the uniformity for improving battery charging and discharging, promote lithium ion
In the diffusion rate of diaphragm and the thermal stability of high temperature lower diaphragm plate so that battery protect liquid measure, capacity plays, forthright again
Energy, cycle performance and security performance have improvement.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of battery diaphragm, which is characterized in that the septum body (10) including being stacked and (20) containing lithium coating, it is described to contain
There is lithium-containing compound and binder, the lithium-containing compound is in the quality point containing in lithium coating (20) in lithium coating (20)
Number is 80%~98%.
2. battery diaphragm according to claim 1, which is characterized in that the lithium-containing compound be selected from lithium zirconate, lithium phosphate,
Lithium aluminate, lithium fluoride, lithium carbonate, lithium oxalate and lithium metasilicate it is one or more.
3. battery diaphragm according to claim 2, which is characterized in that the septum body (10) is polyolefins diaphragm,
The binder is selected from the one or more of polyacrylic acid, polyacrylamide, polyvinyl alcohol and Kynoar.
4. battery diaphragm according to claim 1-3, which is characterized in that the lithium-containing compound and the bonding
The mass ratio of agent is (80~98): (2~20).
5. battery diaphragm according to claim 1-3, which is characterized in that it is described containing lithium coating (20) with a thickness of
1 μm~10 μm.
6. battery diaphragm according to claim 1-3, which is characterized in that described to be arranged containing lithium coating (20) in institute
State the unilateral side or two sides of septum body (10).
7. a kind of preparation method of battery diaphragm according to claim 1-6, comprising:
There is provided lithium-containing compound slurry, the lithium-containing compound slurry includes the mixed uniformly lithium-containing compound, described viscous
Tie agent and dispersing agent；
The lithium-containing compound slurry is coated on the septum body (10)；And
The diaphragm for being coated with the lithium-containing compound slurry is dried and removes the dispersing agent.
8. the preparation method of battery diaphragm according to claim 7, which is characterized in that the temperature of the drying be 60 DEG C~
95℃。
9. the preparation method of battery diaphragm according to claim 7 or 8, which is characterized in that the lithium-containing compound slurry
In the lithium-containing compound and the binder gross mass percentage be 20%~50%.
10. a kind of battery, which is characterized in that including anode pole piece, cathode pole piece, battery diaphragm and electrolyte, the battery every
Film is arranged between the anode pole piece and the cathode pole piece and the anode pole piece and the cathode pole piece is isolated, described
Electrolyte infiltrates the battery diaphragm, the anode pole piece and the cathode pole piece, and the battery diaphragm is such as claim 1-6
Described in any item battery diaphragms or the battery being prepared for such as described in any item preparation methods of claim 7-9 every
Film.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724639.7A CN110459723A (en) | 2019-08-07 | 2019-08-07 | Battery diaphragm and preparation method thereof and battery with the battery diaphragm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724639.7A CN110459723A (en) | 2019-08-07 | 2019-08-07 | Battery diaphragm and preparation method thereof and battery with the battery diaphragm |
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| CN111613759A (en) * | 2020-05-27 | 2020-09-01 | 湖北亿纬动力有限公司 | Diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery |
| CN111900315A (en) * | 2020-08-04 | 2020-11-06 | 中国科学院物理研究所 | Ceramic diaphragm with double-sided coating material coating and preparation method and application thereof |
| CN112271405A (en) * | 2020-10-16 | 2021-01-26 | 欣旺达电动汽车电池有限公司 | Lithium-supplementing composite diaphragm and preparation method thereof |
| CN112768694A (en) * | 2021-01-11 | 2021-05-07 | 深圳市豪鹏科技股份有限公司 | Nickel-hydrogen battery positive electrode slurry, nickel-hydrogen battery positive electrode sheet and nickel-hydrogen battery |
| CN115995657A (en) * | 2023-03-03 | 2023-04-21 | 江苏正力新能电池技术有限公司 | Composite diaphragm structure, electrode assembly and lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111613759A (en) * | 2020-05-27 | 2020-09-01 | 湖北亿纬动力有限公司 | Diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery |
| CN111900315A (en) * | 2020-08-04 | 2020-11-06 | 中国科学院物理研究所 | Ceramic diaphragm with double-sided coating material coating and preparation method and application thereof |
| CN111900315B (en) * | 2020-08-04 | 2021-10-22 | 中国科学院物理研究所 | Ceramic diaphragm with double-sided coating material coating and preparation method and application thereof |
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| CN115995657A (en) * | 2023-03-03 | 2023-04-21 | 江苏正力新能电池技术有限公司 | Composite diaphragm structure, electrode assembly and lithium battery |
| CN115995657B (en) * | 2023-03-03 | 2024-04-23 | 江苏正力新能电池技术有限公司 | Composite diaphragm structure, electrode assembly and lithium battery |
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