CN108630868A - A kind of isolation film and its energy storage device of preparation - Google Patents
A kind of isolation film and its energy storage device of preparation Download PDFInfo
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- CN108630868A CN108630868A CN201710154091.8A CN201710154091A CN108630868A CN 108630868 A CN108630868 A CN 108630868A CN 201710154091 A CN201710154091 A CN 201710154091A CN 108630868 A CN108630868 A CN 108630868A
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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
- 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
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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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
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
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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
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of isolation film and its energy storage devices of preparation.The isolation film includes porous base membrane layer and functional layer, and the functional layer contains high temperature resistant functional material and binder；The binder is the polymer containing lithium ion.
Description
Technical field
The present invention relates to electrochemical field more particularly to a kind of electrochemical energy storage device isolation films.
Background technology
Electrochemical energy storage device often requires higher safety, and requires have good dynamic performance, this
Just the barrier property to the isolation film of one of its critical component and permeability propose higher requirement simultaneously.For example, existing market
On, many technical staff by increase the thickness of battery isolating film or reduce the modes such as porosity of isolation film come improve battery every
Security performance from film and insulation effect, but technical staff has found that the transparent performance of battery isolating film declines simultaneously, this not only shadow
The liquid storage content of battery isolating film has been rung, and has increased the internal resistance of battery isolating film, to finally influence the kinetics of battery
Energy.Some technical staff, in order to better use isolation film on quick charging battery, by reducing battery isolating film
Thickness increases its porosity to improve its permeability, although internal resistance reduces to a certain extent, holds in inside battery pole
Internal short-circuit even thermal runaway easily occurs, eventually leads to the safety accident of cells burst or explosion.
In recent years, in order to solve this problem, a kind of multiple coating battery isolating film is released in the market, relatively thin porous
Coat refractory ceramics coating on isolation film, wherein base membrane layer is designed for keeping the skeleton of battery isolating film and good logical
The design of permeability, ceramic coating layer can improve the heat-resisting quantity of battery isolating film, store fluidity, to improve it using in the battery
Safety.However, the increase of ceramic coating still can not solve the problems, such as that the internal resistance of battery isolating film is big, or even due to coating
In key component macromolecular adhesive introducing so that the whole internal resistance of isolation film and battery further increases, this is asked
Topic equally can cause the efficiency for charge-discharge of battery low, and dynamic performance is poor, even result in the security risk of battery overheat.
Therefore, the battery isolating film that barrier property can be improved there is a need in the field to provide one kind and ion is promoted to be connected.
Invention content
The present invention is intended to provide the battery isolating film that one kind can improve barrier property and ion is promoted to be connected.
In the first aspect of the present invention, a kind of electrochemical energy storage device isolation film is provided, the isolation film includes porous
Base membrane layer and functional layer, the functional layer contain high temperature resistant functional material and binder；The binder is to contain lithium ion
Polymer；The polymer containing lithium ion is the acrylic resin containing lithium ion.
In another preferred example, the polymer containing lithium ion is selected from following one or more：Polypropylene
Sour lithium, Sodium Polyacrylate lithium, polymethylacrylic acid lithium, polymethyl methacrylate lithium, polyacrylonitrile lithium, polyacrylamide lithium；
It preferably is selected from Lithium polyacrylate, Sodium Polyacrylate lithium or polymethylacrylic acid lithium.
In another preferred example, the high temperature resistant functional material is selected from following one or more：Aluminium oxide, oxidation
Silicon, titanium oxide, cerium oxide, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, phosphoric acid
Titanium lithium, titanium phosphate aluminium lithium, lithium nitride, lanthanium titanate lithium；It is preferred that self-alumina or silica.
In another preferred example, the functional layer also contains additive；The additive is selected from following one or two
More than：Sodium carboxymethylcellulose, glucose, starch, cellulose；More preferable sodium carboxymethylcellulose.
In another preferred example, with the total weight of the functional layer, wherein containing the high temperature resistant functional material 90-
98wt%, containing the binder 2-8wt%, remaining is additive.
In another preferred example, the porous base membrane layer is the porous basement membrane of porous basement membrane or at least one side by coating；
The porous basement membrane is layer multi-layer or single layer；The thickness of the porous base membrane layer is 3-50 μm；More preferably 10-15 μm.
In another preferred example, the functional layer is located at the one or both sides of porous base membrane layer；The thickness of the functional layer
It is 1-5 μm；More preferably 1.5-3 μm.
In the second aspect of the present invention, a kind of electrochemical energy storage device is provided, the electrochemical energy storage device includes just
Pole, cathode, electrolyte and the isolation film provided present invention as described above between anode and cathode.
Accordingly, the battery isolating film that barrier property can be improved the present invention provides one kind and ion is promoted to be connected.
Specific implementation mode
As used in the present invention, " electrochemical energy storage device " includes lithium secondary battery, lithium rechargeable battery, super capacitor
Device, fuel cell, solar cell etc.；The lithium rechargeable battery includes polymer lithium ion secondary battery.
As used in the present invention, " porous basement membrane " material is selected from polyolefin, aramid fiber, polyimides, polyester fiber, acrylic fibers
One or more of dimension, Kynoar.
In the present invention, unless otherwise indicated, numberical range " a-b " indicates the contracting of the arbitrary real combinings between a to b
Sketch form shows that wherein a and b are real numbers.Such as numberical range " 0-5 " indicates all to have listed herein between " 0-5 "
Whole real numbers, " 0-5 " are that the breviary of these combinations of values indicates.
If be not specifically stated, the term "an" used in this specification refers to "at least one".
" range " disclosed herein is in the form of lower and upper limit.Can be respectively one or more lower limits and one
Or multiple upper limits.Given range is defined by selecting a lower limit and a upper limit.Selected lower and upper limit limit
The boundary of special range is determined.All ranges that can be defined in this way comprising and can combine, i.e., any lower limit
It can combine to form a range with any upper limit.For example, the range of 60-120 and 80-110 are listed for special parameter,
The range for being interpreted as 60-110 and 80-120 is also to expect.In addition, if the minimum zone value 1 and 2 listed, and if
Maximum magnitude value 3,4 and 5 is listed, then following range can be expected all：1-3,1-4,1-5,2-3,2-4 and
2-5.
Inventor after extensive and in-depth study, has found the porous basement membrane by coating by porous basement membrane or at least one side
As agent structure, the isolation film that arbitrary one or both sides coating function layer is formed, due to having used lithium salts viscous in functional layer
Tie agent so that isolation film shows low internal resistance, and prepared lithium ion battery fast charge capacity is high, has extended cycle life, security performance
It is good.On this basis, the present invention is completed.
Isolation film
Isolation film provided by the invention includes the functional layer of porous base membrane layer and coating thereon, and functional layer includes at least one layer
Structure, functional layer are located at the one or both sides of porous base membrane layer.
Heretofore described porous base membrane layer can be single layer, i.e., porous basement membrane, or multilayer, i.e. at least one side pass through
Cross the porous basement membrane of coating.The material of coating can be it is commonly used in the art, such as, but not limited to, PVDF (polyvinylidene fluorides
Alkene).The thickness of the porous base membrane layer be 3-50 μm, preferably 10-15 μm, porosity 10%-80%.The porous basement membrane
Skeleton structure of the layer as isolation film provides support for functional layer, and provides the insulating materials between positive and negative anodes in the battery,
Porous structure provides channel for Ion transfer in the battery.Heretofore described functional layer includes high temperature resistant functional material and glues
Tie agent.The high temperature resistant functional material is essentially all inorganic material, selected from aluminium oxide, silica, titanium oxide, cerium oxide, carbon
Sour calcium, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate, barium titanate, lithium phosphate, titanium phosphate lithium, titanium phosphate aluminium lithium, nitrogen
Change at least one of lithium, lanthanium titanate lithium.The binder is selected from the binder containing lithium ion, preferably comprises the third of lithium ion
Olefin(e) acid resin.The optional Lithium polyacrylate of the binder, Sodium Polyacrylate lithium, polymethylacrylic acid lithium, poly-methyl methacrylate
At least one of ester lithium, polyacrylonitrile lithium, polyacrylamide lithium, preferably Lithium polyacrylate, Sodium Polyacrylate lithium, poly- methyl-prop
At least one of olefin(e) acid lithium.The functional layer can also contain other additives, the optional carboxymethyl cellulose of additive
One or more of sodium, glucose, starch, cellulose, preferably carboxymethyl cellulose sodium.
With the total weight of the functional layer, the mass percent of the high temperature resistant functional material is 90%-98%, described
The mass percent of binder is 2%-8%, remaining is additive.Ranging from 1-5 μm of the thickness in monolayer of the functional layer, preferably
1.5-3μm。
High temperature resistant functional material can improve the whole high temperature resistance of isolation film in the functional layer, improve the peace of battery
Quan Xing；The insulation performance that isolation film can be improved again, improves anti-breakdown performance；The mechanical strength of isolation film, antioxygen can also be improved
The property changed；The electrolyte liquid storage content that isolation film can be increased again, to extend the cycle life of battery.
It is bonding with porous basement membrane can to provide high temperature resistant functional material for binder in the functional layer, can also provide high temperature resistant
The intergranular bonding of functional material can also improve ion mobility in battery charge and discharge process, and then improve the dynamic of battery
Mechanical property.
Electrochemical energy storage device
Electrochemical energy storage device provided by the invention includes anode, cathode, electrolyte, the sheet between anode and cathode
The isolation film provided is provided.In one embodiment of the invention, the electrochemical energy storage device can also include pack case.
The feature that the features described above or embodiment that the present invention mentions are mentioned can be in any combination.Disclosed in this case specification
All features can be used in combination with any composition form, each feature disclosed in specification, any can provide it is identical,
The alternative characteristics of impartial or similar purpose replace.Therefore it is only impartial or similar spy except having special instruction, revealed feature
The general example of sign.
Main advantages of the present invention are：
1, the binder containing lithium ion used in isolation film provided by the invention can with lithium ion exchanged in electrolyte,
Ion mobility is improved, and then improves the dynamic performance of battery.
2, the binder containing lithium ion used in isolation film provided by the invention glues in the long-term cyclic process of battery
Lithium ion in knot agent can be deviate to supplement circulating battery needs, to extend cycle life.
3, isolation film provided by the invention solves that internal resistance is big, and cell dynamics performance and security performance cannot be taken into account
Quagmire.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise all percentage, ratio, ratio or number is pressed
Weight meter.
The unit in percent weight in volume in the present invention is well-known to those skilled in the art, for example, refer to
The weight of solute in 100 milliliters of solution.
Unless otherwise defined, all professional and scientific terms used in text and meaning known to one skilled in the art
Justice is identical.In addition, any method and material similar or impartial to described content can be applied to the method for the present invention.Wen Zhong
The preferred implement methods and materials are for illustrative purposes only.
Comparative example 1
Isolation film used in electrochemical appliance is monolayer polyethylene basement membrane, 12 μm of thickness, porosity 41%, is not set on basement membrane
Set other functional layers, anode, isolation film, cathode wound successively and form naked battery core, and be assembled into the lithium of model 353286 from
Sub- battery.
Comparative example 2
Electrochemical appliance is identical as comparative example 1, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour sodium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 1
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 2
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour sodium lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 3
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 3 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is poly- methyl
Lithium acrylate, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 4
Electrochemical appliance is same as Example 1, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 93：5：2.
Embodiment 5
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is monolayer polyethylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is silica, and binder is polypropylene
Sour lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 6
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is single-layer polypropylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 7
Electrochemical appliance is identical as comparative example 2, except the both sides that used isolation film is monolayer polyethylene basement membrane respectively coat
Thickness is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is poly- third
Olefin(e) acid lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 8
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is three-layer polypropylene basement membrane is thick
Degree is 2 μm of functional layers, and the inorganic material of 12 μm of basement membrane thickness, porosity 41%, functional layer is aluminium oxide, and binder is polypropylene
Sour lithium, additive are sodium carboxymethylcellulose, and the ratio of three is 95：4：1.
Embodiment 9
Electrochemical appliance is identical as comparative example 2, except the side coating that used isolation film is single-layer polypropylene basement membrane is thick
Degree is 2 μm of functional layers, and the other side of basement membrane is provided with 1 μm of PVDF coats, basement membrane thickness 12um, porosity 41%, function
The inorganic material of layer is aluminium oxide, and binder is Lithium polyacrylate, and additive is sodium carboxymethylcellulose, and the ratio of three is
95：4：1.
Performance test
Isolation film and lithium ion battery to comparative example 1-2 and embodiment 1-9 carry out following performance test：
1) the air permeability test of isolation film：It is tested with Gurley permeating degree testers；
2) isolation film breakdown voltage is tested：It is tested using breakdown voltage tester, voltage 6KV, testing time 10s；
3) isolation film inner walkway：Isolation film is assembled into CR2016 button cells (being not added with positive/negative plate), using electrification
The AC impedance spectroscopy of work station test button electricity is learned, the focus value with horizontal axis is the internal resistance value of isolation film；
4) guarantor's liquid measure test of battery：After fluid injection before weight-fluid injection of battery battery weight；
5) 4C charging capacitys：By design capacity be 1900mAh battery, under the conditions of 23 DEG C, with the electric current of 7600mA into
Row charging, records charging capacity；
6) cycle life：Under the conditions of 23 DEG C, with the multiplying power of 0.5C/0.5C to design capacity for 1900mAh battery into
Row cycle charge-discharge records the cycle-index of battery when the capacity of battery only has 80%；
7) test is overcharged：At room temperature, to battery with 1C charging 120min, whether observation battery is on fire or explodes.
The isolation film and performance of lithium ion battery test result of comparative example 1-2 and embodiment 1-9 is as shown in table 1.
Isolation film made from table 1, comparative example and embodiment and battery performance test result
The result shows that of the present invention used the isolation film of the functional layer of lithium salts binder to show low internal resistance, institute
The battery fast charge capacity of preparation is high, has extended cycle life, has a safety feature.Used only in comparative example 1 be not arranged functional layer every
From film, although its internal resistance is small, permeability is good, and one side breakdown potential is forced down, and high temperature resistance is poor, the electricity for causing it to prepare
Pond safety is poor, shows as overcharging test generation combustion phenomena, another aspect ion conduction is still insufficient, 4C charging capacitys
It is not advantageous with cycle life；Although comparative example 2 has used heat safe functional layer, the binder in its functional layer is common
Sodium Polyacrylate binder, not only increase ventilative value and the internal resistance of isolation film, and affect the power of prepared battery
Learn performance and cycle life, overcharge safety test also not over.Compared with comparative example 2, embodiment 1-3 has been respectively adopted poly-
Lithium acrylate, Sodium Polyacrylate lithium and polymethylacrylic acid lithium substitute common Sodium Polyacrylate binder, not only effectively reduce
The internal resistance of isolation film, and the dynamic performance of battery significantly improves (about 20%), the cycle life of battery and safety in addition
It can also be significantly improved, this lithium ion being primarily due in binder containing lithium is effectively exchanged with the lithium ion realization in electrolyte
And the phase supplements the lithium ion in electrolyte after cycling.Embodiment 5 is within feasible region by the quality percentage of the binder containing lithium
Than improving 1%, effect of the present invention equally can reach.Silica has been respectively adopted as high temperature resistant in embodiment 5 and embodiment 6
As insulating materials, the binder in functional layer is binder containing lithium for material and polypropylene, can play improve isolation film and
The internal resistance of battery, the effect of dynamic performance, cycle life and safety.Embodiment 7 is double spread functional layer, although isolation
The ventilative value of film increases, but since the ratio of lithium ion also accordingly increases, to which the internal resistance of isolation film declines apparent, the 4C of battery
Charging capacity and cycle life also have promotion.Embodiment 8 can equally be played using functional layer is arranged on the insulating layer of three-decker
Effect of the present invention.The isolation film of embodiment 9 is additionally provided with PVDF in addition to insulating layer and functional layer, in the opposite side of functional layer
Coat, PVDF coats can play the role of isolation film and pole piece being bonded, and not influence the high temperature resistance of functional layer and right
Cell dynamics performance, cycle life and the contribution of safety.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limited to the substantial technological content model of the present invention
It encloses, substantial technological content of the invention is broadly to be defined in the right of application, any technology that other people complete
Entity or method also or a kind of equivalent change, will if identical with defined in the right of application
It is considered as being covered by among the right.
Claims (10)
1. a kind of electrochemical energy storage device isolation film, the isolation film includes porous base membrane layer and functional layer, which is characterized in that institute
It states functional layer and contains high temperature resistant functional material and binder；The binder is the polymer containing lithium ion.
2. isolation film as described in claim 1, which is characterized in that the polymer containing lithium ion is to contain lithium ion
Acrylic resin.
3. isolation film as described in claim 1, which is characterized in that the polymer containing lithium ion is selected from following one kind
Or it is two or more：Lithium polyacrylate, Sodium Polyacrylate lithium, polymethylacrylic acid lithium, polymethyl methacrylate lithium, polyacrylonitrile
Lithium, polyacrylamide lithium；It preferably is selected from Lithium polyacrylate, Sodium Polyacrylate lithium or polymethylacrylic acid lithium.
4. isolation film as described in claim 1, which is characterized in that the high temperature resistant functional material is selected from following one kind or two
Kind or more：Aluminium oxide, silica, titanium oxide, cerium oxide, calcium carbonate, calcium oxide, zinc oxide, magnesia, Cerium titanate, calcium titanate,
Barium titanate, lithium phosphate, titanium phosphate lithium, titanium phosphate aluminium lithium, lithium nitride, lanthanium titanate lithium；It is preferred that self-alumina or silica.
5. isolation film according to any one of claims 1-4, which is characterized in that the functional layer also contains additive；It is described
Additive is selected from following one or more：Sodium carboxymethylcellulose, glucose, starch, cellulose；It is preferred that carboxymethyl is fine
The plain sodium of dimension.
6. isolation film as described in claim 1, which is characterized in that with the total weight of the functional layer, wherein containing described
High temperature resistant functional material 90-98wt%, containing the binder 2-8wt%, remaining is additive.
7. isolation film as described in claim 1, which is characterized in that the porous base membrane layer is that porous basement membrane or at least one side pass through
Cross the porous basement membrane of coating.
8. isolation film as described in claim 1, which is characterized in that the porous basement membrane is layer multi-layer or single layer；It is described porous
The thickness of base membrane layer is 3-50 μm；It is preferred that 10-15 μm.
9. isolation film as claimed in any one of claims 1 to 6, which is characterized in that the functional layer is located at the one of porous base membrane layer
Side or both sides；The thickness of the functional layer is 1-5 μm；It is preferred that 1.5-3 μm.
10. a kind of electrochemical energy storage device, which is characterized in that the electrochemical energy storage device include anode, cathode, electrolyte and
Positioned at anode and cathode between such as claim 1-9 any one of them isolation films.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710154091.8A CN108630868A (en) | 2017-03-15 | 2017-03-15 | A kind of isolation film and its energy storage device of preparation |
| PCT/CN2017/099374 WO2018166143A1 (en) | 2017-03-15 | 2017-08-29 | Separator and energy storage device prepared therefrom |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154091.8A CN108630868A (en) | 2017-03-15 | 2017-03-15 | A kind of isolation film and its energy storage device of preparation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970588A (en) * | 2019-12-18 | 2020-04-07 | 江苏厚生新能源科技有限公司 | Coating diaphragm for sodium ion battery, preparation method of coating diaphragm and sodium ion battery |
| CN114188668A (en) * | 2021-12-17 | 2022-03-15 | 蜂巢能源科技股份有限公司 | Coating slurry, preparation method thereof, composite diaphragm and lithium ion battery |
| CN117352959A (en) * | 2023-12-01 | 2024-01-05 | 宁德时代新能源科技股份有限公司 | Isolation diaphragm, battery and electric equipment |
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| CN103956450A (en) * | 2014-05-16 | 2014-07-30 | 中国东方电气集团有限公司 | Composite membrane for lithium ion batteries and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102496694B (en) * | 2011-12-23 | 2014-06-25 | 常州大学 | Lithium ion battery |
| CN102569702B (en) * | 2012-01-19 | 2015-01-14 | 常州大学 | Ion selective membrane used by non-solid-state electrode and preparation method thereof |
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2017
- 2017-03-15 CN CN201710154091.8A patent/CN108630868A/en active Pending
- 2017-08-29 WO PCT/CN2017/099374 patent/WO2018166143A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956450A (en) * | 2014-05-16 | 2014-07-30 | 中国东方电气集团有限公司 | Composite membrane for lithium ion batteries and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970588A (en) * | 2019-12-18 | 2020-04-07 | 江苏厚生新能源科技有限公司 | Coating diaphragm for sodium ion battery, preparation method of coating diaphragm and sodium ion battery |
| CN114188668A (en) * | 2021-12-17 | 2022-03-15 | 蜂巢能源科技股份有限公司 | Coating slurry, preparation method thereof, composite diaphragm and lithium ion battery |
| CN114188668B (en) * | 2021-12-17 | 2024-02-13 | 蜂巢能源科技股份有限公司 | Coating slurry, preparation method thereof, composite diaphragm and lithium ion battery |
| CN117352959A (en) * | 2023-12-01 | 2024-01-05 | 宁德时代新能源科技股份有限公司 | Isolation diaphragm, battery and electric equipment |
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| WO2018166143A1 (en) | 2018-09-20 |
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Application publication date: 20181009 |