CN113381125A - Ion-conductive functional resin and lithium battery diaphragm containing same - Google Patents
Ion-conductive functional resin and lithium battery diaphragm containing same Download PDFInfo
- Publication number
- CN113381125A CN113381125A CN202110787759.9A CN202110787759A CN113381125A CN 113381125 A CN113381125 A CN 113381125A CN 202110787759 A CN202110787759 A CN 202110787759A CN 113381125 A CN113381125 A CN 113381125A
- Authority
- CN
- China
- Prior art keywords
- core
- polymer ion
- functional resin
- conducting
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
-
- 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
-
- 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
- H01M50/497—Ionic conductivity
-
- 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 belongs to the technical field of batteries, and particularly relates to a polymer ion-conducting functional resin, a preparation method thereof and a lithium battery diaphragm coated with the polymer ion-conducting functional resin, wherein the polymer ion-conducting functional resin has a core-shell structure, the core-shell structure comprises a core part and a shell part coated on the outer surface of the core part, and the crystallinity of the core is more than 20% of that of the shell part. Slurry prepared from the polymer ion-conducting resin is coated on one or two surfaces of a porous substrate to prepare a diaphragm, and gaps among the core shells can provide channels for organic solvents and micromolecular compounds, so that the diaphragm has higher liquid absorption rate; the low crystallinity of the shell structure can ensure that the diaphragm can be attached to a pole piece or an electrode at a low hot-pressing temperature, thereby providing guarantee for the rapid passing of lithium ions in the charging and discharging processes; meanwhile, the high crystallinity of the core structure of the polymer ion-conducting resin can ensure that the coating layer is not easy to deform under the action of external force so as to maintain the structural integrity.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to synthesis of a polymer ion-conducting resin and a preparation method of a lithium battery diaphragm containing the ion-conducting resin.
Background
The high-speed growth of industries such as unmanned aerial vehicles, electric tools, electric automobiles, intelligent medical equipment and robots has increasingly urgent need for energy storage devices with fast charging and discharging characteristics, and the charge-discharge rate performance and the cycle performance become key performance indexes of lithium ion batteries. In the structure of the lithium battery, the diaphragm is one of the key inner layer components, and the diaphragm mainly has the functions of separating the positive electrode and the negative electrode of the battery and preventing short circuit caused by contact of the two electrodes, and has the function of enabling electrolyte ions to pass through, and the diaphragm is not well attached or bonded with a pole piece or an electrode, so that the lithium ions can be blocked to pass through, the smooth proceeding of the charging and discharging process can be influenced, and even the phenomenon of lithium precipitation on the surface is caused, so that the rate capability and the cycle performance of the battery are reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a core-shell structure type polymer ion-conducting resin and a lithium battery diaphragm coated with the polymer ion-conducting functional resin, wherein core-shell polymer microspheres are special microsphere materials which contain cores inside and are composed of shell layers coated on the surfaces of the cores, and compared with completely solid polymer microspheres, the core-shell structure microspheres can integrate the functions of two polymers, so that the diaphragm obtains more excellent performance, can be tightly adhered to a pole piece or an electrode and has higher electrolyte absorption rate.
Specifically, the preparation of the shell-core type resin at least comprises the following steps:
step 1: adding emulsifier and deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, heating to the reaction temperature, adding an initiator, introducing nitrogen for 20min, slowly dropping monomer methyl methacrylate into the constant pressure dropping funnel, and continuing to react for 2h after the dropping is finished to finish the nuclear polymerization stage.
Step 2: and (2) adding a shell layer monomer, a required amount of emulsifier, a required amount of initiator and a required amount of deionized water into the core layer obtained in the step (1), heating to a reaction temperature, stirring for reaction for 4 hours, taking out, demulsifying, washing with water, and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
Preferably, the core-shell structure core is polymethyl methacrylate, and the outer shell layer is any one of poly (isoprene-co-styrene), trimethylsilyl acrylic resin, polypropylene n-butyl ester, polybutadiene and polymethylsiloxane.
Preferably, the raw materials for preparing the polymer ion-conducting resin with the core-shell structure comprise, by weight, 50-70 parts of core-layer monomers, 15-25 parts of shell-layer monomers, 0.1-2 parts of emulsifiers, 0.1-1 part of initiators and 100-300 parts of deionized water.
Preferably, the emulsifier is selected from: any one or mixture of several of sodium dodecyl sulfate, sodium tetradecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, sodium dodecyl sulfate and sodium tetradecyl sulfate.
Preferably, the initiator is any one or a mixture of potassium persulfate, sodium persulfate and sodium sulfite.
Preferably, the reaction temperature is 30-90 ℃.
Preferably, the particle size of the polymer ion conducting resin with the core-shell structure is 50 nm-500 nm.
Further, the synthesized polymer ion-conducting resin is coated on one side or two sides of the porous substrate to prepare the lithium battery diaphragm.
Preferably, the porous substrate material is one or more of polyethylene, polypropylene, polyethylene terephthalate, polyamide, high-density polyethylene, polyacrylonitrile and viscose fiber.
The invention has the beneficial effects that:
according to the scheme, firstly, the core-shell type resin is integrally prepared, the crystallinity of the core is more than 20% of that of the shell layer, then the core-shell type resin is compounded with the porous base membrane to prepare the diaphragm, and the whole resin structure is formed by the core-shell type polymer in a microscopic level; the diaphragm of the resin layer is coated on one side or multiple sides, and gaps among the core shells can provide channels for organic solvents and small molecular compounds in electrolyte, so that the diaphragm has higher wettability and liquid absorption rate; because shell material crystallinity is low, make the diaphragm just can bond together with the pole piece under low hot pressing temperature, the pole piece is inseparable with the diaphragm laminating to make lithium ion accomplish the charge-discharge process through the diaphragm more easily, this polymer leads the high crystallinity of ion resin nuclear structure simultaneously and makes the diaphragm can adapt to higher tensile strength, thereby can make coating layer non-deformable under the exogenic action and keep the integrality of utmost point core structure.
Detailed Description
The following is a detailed description of the battery separator and the method of preparing the same, and the method of preparing the polymer ion conductive functional resin according to the embodiments of the present application.
Each part by weight in the following examples was 1 g.
Example 1
Step 1: 20 parts of sodium dodecyl sulfate and 1000 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, 10 parts of potassium persulfate is added under the stirring at the temperature of 30 ℃, nitrogen is introduced for 20min, 500 parts of monomer methyl methacrylate is slowly dropped into the constant pressure dropping funnel, and the reaction is continued for 2 hours after the dropping is finished to finish the nuclear polymerization stage.
Step 2: and (2) adding 200 parts of poly (isoprene-co-styrene), 10 parts of sodium dodecyl sulfate, 10 parts of potassium persulfate and 1500 parts of deionized water into the core layer obtained in the step (1), heating to 80 ℃, stirring for reacting for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
A lithium battery diaphragm is prepared by arranging continuous polymer ion-conducting functional resin functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Example 2
Step 1: 15 parts of sodium tetradecyl sulfate and 1500 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, 10 parts of sodium persulfate is added under the stirring at the temperature of 30 ℃, nitrogen is introduced for 20min, 600 parts of monomer methyl methacrylate is slowly dropped into the constant pressure dropping funnel, and the reaction is continued for 2 hours after the dropping is finished to finish the nuclear polymerization stage.
Step 2: and (2) adding 300 parts of trimethylsilyl acrylic resin, 20 parts of sodium tetradecyl sulfate, 15 parts of sodium persulfate and 2000 parts of deionized water into the core layer obtained in the step (1), heating to 90 ℃, stirring for reacting for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
A lithium battery diaphragm is prepared by arranging continuous polymer ion-conducting functional resin functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Example 3
Step 1: 20 parts of sodium hexadecyl sulfate and 1500 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, stirring is carried out at 40 ℃, 15 parts of sodium sulfite is added, nitrogen is introduced for 20min, 5000 parts of monomer methyl methacrylate is slowly dropped into the constant pressure dropping funnel, and the reaction is continued for 2h after the dropping is finished, so that the nuclear polymerization stage is completed.
Step 2: adding 300 parts of polypropylene n-butyl ester, 20 parts of sodium hexadecyl sulfate, 15 parts of sodium sulfite and 2000 parts of deionized water into the nuclear layer obtained in the step 1, heating to 85 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
A lithium battery diaphragm is prepared by arranging continuous polymer ion-conducting functional resin functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Example 4
Step 1: adding 25 parts of sodium octadecyl sulfate and 1000 parts of deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, stirring at 40 ℃, adding 20 parts of sodium sulfite, introducing nitrogen for 20min, slowly dropping 6000 parts of monomer methyl methacrylate into the constant pressure dropping funnel, and continuing to react for 2h after the dropping is finished to finish the nuclear polymerization stage.
Step 2: and (2) adding 300 parts of polybutadiene, 20 parts of sodium octadecyl sulfate, 15 parts of sodium sulfite and 2000 parts of deionized water into the core layer obtained in the step (1), heating to 90 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
A lithium battery diaphragm is prepared by arranging continuous polymer ion-conducting functional resin functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Example 5
Step 1: 30 parts of sodium dodecyl sulfate and 2000 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, 20 parts of sodium persulfate is added under stirring at 40 ℃, nitrogen is introduced for 20min, 5000 parts of monomer methyl methacrylate is slowly dropped into the constant pressure dropping funnel, and the reaction is continued for 2h after the dropping is finished, so that the stage of nuclear polymerization is completed.
Step 2: and (2) adding 300 parts of polymethylsiloxane, 25 parts of sodium dodecyl sulfate, 20 parts of sodium sulfite and 2000 parts of deionized water into the core layer obtained in the step (1), heating to 85 ℃, stirring for reacting for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
A lithium battery diaphragm is prepared by arranging continuous polymer ion-conducting functional resin functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Comparative example 1
30 parts of sodium dodecyl sulfate and 2000 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, stirring is carried out at 40 ℃, 20 parts of sodium persulfate is added, nitrogen is introduced for 20min, 5000 parts of monomer methyl methacrylate is slowly dropped into the constant pressure dropping funnel, reaction is continued for 2h after dropping is finished, and the single polymethyl methacrylate polymer is obtained after demulsification, washing and drying are taken out.
A continuous polymethyl methacrylate polymer functional layer with the thickness of 2 mu m is arranged on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m to prepare the lithium battery diaphragm.
Comparative example 2
200 parts of poly (isoprene-co-styrene), 10 parts of sodium dodecyl sulfate, 10 parts of potassium persulfate and 1500 parts of deionized water are added into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant pressure dropping funnel, the temperature is increased to 80 ℃, the mixture is stirred and reacted for 4 hours, and the mixture is taken out for demulsification, washing and drying to obtain the single poly (isoprene-co-styrene) polymer.
A lithium battery diaphragm is prepared by arranging continuous poly (isoprene-co-styrene) polymer functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Comparative example 3
And (2) adding 300 parts of trimethylsilyl acrylic resin, 20 parts of sodium tetradecyl sulfate, 15 parts of sodium persulfate and 2000 parts of deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant-pressure dropping funnel, adding the mixture into the core layer obtained in the step (1), heating to 90 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the single polytrimethylsilyl acrylic resin polymer.
A lithium battery diaphragm is prepared by arranging continuous trimethyl silane alkyl acrylic resin polymer functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Comparative example 4
And (2) adding 300 parts of polypropylene n-butyl ester, 20 parts of sodium hexadecyl sulfate, 15 parts of sodium sulfite and 2000 parts of deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant-pressure dropping funnel, adding the mixture into the nuclear layer obtained in the step (1), heating to 85 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the single polypropylene n-butyl ester resin polymer.
A lithium battery diaphragm is prepared by arranging continuous polypropylene n-butyl ester polymer functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m.
Comparative example 5
And (2) adding 300 parts of polybutadiene, 20 parts of sodium octadecyl sulfate, 15 parts of sodium sulfite and 2000 parts of deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant-pressure dropping funnel, adding the mixture into the nuclear layer obtained in the step (1), heating to 90 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the single polybutadiene resin polymer.
A continuous polybutadiene polymer functional layer with the thickness of 2 mu m is arranged on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m to prepare the lithium battery diaphragm.
Comparative example 6
And (2) adding 300 parts of polymethylsiloxane, 25 parts of sodium dodecyl sulfate, 20 parts of sodium sulfite and 2000 parts of deionized water into a reaction kettle provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant-pressure dropping funnel, adding the mixture into the nuclear layer obtained in the step (1), heating to 85 ℃, stirring for reaction for 4 hours, taking out, demulsifying, washing and drying to obtain the core-shell structure type polymer ion-conducting functional resin. A single methylsiloxane polymer was obtained.
A continuous polymethyl siloxane polymer functional layer with the thickness of 2 mu m is arranged on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m to prepare the lithium battery diaphragm.
Comparative example 7
A lithium battery diaphragm is prepared by arranging continuous polyvinylidene fluoride functional layers with the thickness of 2 mu m on two sides of a polyethylene single-layer porous base film with the thickness of 12 mu m. Polyvinylidene fluoride used in coating the separator was purchased from Arkema, france.
Performance testing of lithium battery separators
The following performance tests were performed on the separators of examples 1 to 5 and comparative examples 1 to 7:
(1) air permeability: air permeability may also be characterized by a Gurley value, which refers to the time required for a particular amount of air to pass through a particular area of membrane at a particular pressure (standard Gruley: the time for 100mL of gas to pass through a 1 square inch membrane at a 4.88 inch water column pressure). The permeability increase is the permeability of the coating layer membrane minus the permeability of the base film.
(2) Internal resistance: the alternating current impedance method (EIS) is more commonly used for testing the resistance of the separator, and the Nm value, i.e., the MacMullini constant, is obtained by testing the resistance of the separator in an electrolyte solution as compared with the resistance of the electrolyte solution. And applying a sinusoidal alternating voltage signal to a measuring device, and analyzing data by using an equivalent circuit through measuring impedance values with different frequencies in a certain range to obtain the information of the diaphragm ionic resistance.
(3) Peel strength: the method comprises the steps of adhering a coating surface of a coated diaphragm and a glass slide by using an adhesive to prepare a glue joint sample, reversing the coated diaphragm by 180 degrees, peeling the glue joint sample from an opening of glue joint by using a universal tensile testing machine at a specified speed, gradually separating the coated diaphragm from the glass slide along the length direction of the adhered surface, completely adhering the coating of the coated diaphragm from a base film by using the adhesive in the separation process, separating the coating from the base film, and automatically obtaining a force value when the coating is separated from the base film through the testing machine so as to calculate the peeling strength between the coating of the coated diaphragm and the base film.
(4) Tensile strength: and (3) testing tensile strength: GB 13022-91, film tensile property test method, is adopted. The test directions are MD and TD.
(5) Standing time after liquid injection: after the battery is injected with liquid, the battery is stood at normal temperature, and the pole piece and the diaphragm are well soaked until the formation time.
The results of the separator performance tests of examples 1 to 5 and comparative examples 1 to 7 are shown in table 1 below.
TABLE 1
As can be seen from table 1, the lithium battery diaphragm prepared from the core-shell structure polymer ion-conducting functional resin has the advantages of better tensile strength, peel strength and air permeability, short standing time after liquid injection, low internal resistance and the like, and has higher liquid absorption rate, the liquid absorption rate of the diaphragm not only reflects the affinity of the diaphragm and an electrolyte, but also reflects the difference of the microporous structure of the diaphragm, the higher the liquid absorption rate is, the higher the porosity, the higher the through-hole rate and the better the wettability are, the larger the amount of the electrolyte absorbed by a unit volume is, the more favorable the lithium ion exchange is, and the support is provided for improving the rate capability and the cycle performance of the battery.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The polymer ion-conducting functional resin composite diaphragm for the lithium battery is characterized in that the diaphragm is prepared by coating polymer ion-conducting functional resin on one side or two sides of a porous substrate, the polymer ion-conducting functional resin has a core-shell structure, the core-shell structure comprises a core part and a shell layer wrapping the outer surface of the core part, and the crystallinity of the core is more than 20% greater than that of the shell layer.
2. The polymer ion-conducting functional resin composite separator for a lithium battery as claimed in claim 1, wherein the particle size of the polymer ion-conducting resin with the core-shell structure is 50nm to 500 nm.
3. The composite separator of claim 1, wherein the preparation process of the polymer ion-conductive functional resin at least comprises the following steps:
step 1: adding emulsifier and deionized water into a reactor provided with a thermometer, a magnetic stirring device, a reflux condensing device and a constant-pressure dropping funnel, heating to the reaction temperature, adding an initiator, introducing nitrogen for 20min, slowly dropping monomer methyl methacrylate into the constant-pressure dropping funnel, and continuing to react for 2h after the dropping is finished to finish the nuclear polymerization stage;
step 2: and (3) adding a shell layer monomer, a required amount of emulsifier, a required amount of initiator and a required amount of deionized water into the product obtained in the step (1), heating to a reaction temperature, stirring for reaction for 4 hours, taking out, demulsifying, washing with water, and drying to obtain the core-shell structure type polymer ion-conducting functional resin.
4. The polymer ion-conducting functional resin composite separator for a lithium battery as claimed in claim 3, wherein the core-shell structure core is polymethyl methacrylate, and the outer shell layer is any one of poly (isoprene-co-styrene), trimethylsilylacrylic acid resin, polypropylene n-butyl ester, polybutadiene and polymethylsiloxane.
5. The polymer ion-conducting functional resin composite diaphragm for the lithium battery as claimed in claim 3, wherein the raw materials for preparing the polymer ion-conducting resin with the core-shell structure comprise, by weight, 50-70 parts of core layer monomers, 15-25 parts of shell layer monomers, 0.1-2 parts of emulsifiers, 0.1-1 part of initiators, and 100-300 parts of deionized water.
6. The polymer ion-conducting functional resin composite separator for a lithium battery as claimed in claim 3, wherein the emulsifier is selected from the group consisting of: any one or mixture of several of sodium dodecyl sulfate, sodium tetradecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, sodium dodecyl sulfate and sodium tetradecyl sulfate.
7. The polymer ion-conducting functional resin composite separator for a lithium battery as claimed in claim 3, wherein the initiator is any one or a mixture of potassium persulfate, sodium persulfate and sodium sulfite.
8. The polymer ion conductive functional resin composite separator for a lithium battery as claimed in claim 3, wherein the reaction temperature is 30 to 90 ℃.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787759.9A CN113381125B (en) | 2021-07-13 | 2021-07-13 | Ion-conductive functional resin and lithium battery diaphragm containing same |
| PCT/CN2022/087620 WO2023284348A1 (en) | 2021-07-13 | 2022-04-19 | Ion-conducting functional resin and lithium battery separator containing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787759.9A CN113381125B (en) | 2021-07-13 | 2021-07-13 | Ion-conductive functional resin and lithium battery diaphragm containing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113381125A true CN113381125A (en) | 2021-09-10 |
| CN113381125B CN113381125B (en) | 2023-02-17 |
Family
ID=77581760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110787759.9A Active CN113381125B (en) | 2021-07-13 | 2021-07-13 | Ion-conductive functional resin and lithium battery diaphragm containing same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113381125B (en) |
| WO (1) | WO2023284348A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929827A (en) * | 2021-09-16 | 2022-01-14 | 深圳知行新能源材料科技有限公司 | Battery coating material and preparation method thereof, battery coating slurry and secondary battery |
| WO2023284348A1 (en) * | 2021-07-13 | 2023-01-19 | 上海恩捷新材料科技有限公司 | Ion-conducting functional resin and lithium battery separator containing same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0931297A (en) * | 1995-07-24 | 1997-02-04 | Gantsu Kasei Kk | Water-dispersible composition and its production |
| CN101373345A (en) * | 2007-08-23 | 2009-02-25 | 施乐公司 | Method for making emulsion aggregation particles using core-shell polymer nanoparticles |
| CN103146161A (en) * | 2013-03-29 | 2013-06-12 | 浙江海正生物材料股份有限公司 | Modified polylactic resin composition as well as preparation method and application thereof |
| CN104685681A (en) * | 2012-09-28 | 2015-06-03 | 古河电气工业株式会社 | Collector, electrode structure, nonaqueous electrolyte battery, conductive filler, and electricity storage component |
| CN106977669A (en) * | 2017-05-08 | 2017-07-25 | 南通艾德旺化工有限公司 | Nuclear-shell structure type ACR resins and preparation method thereof |
| CN111599969A (en) * | 2020-05-29 | 2020-08-28 | 东莞市溢兴新材料科技有限公司 | PVDF (polyvinylidene fluoride) -coated lithium ion battery diaphragm and preparation method thereof |
| CN112055883A (en) * | 2018-03-02 | 2020-12-08 | 阿科玛股份有限公司 | Fluoropolymer binder coatings for use in electrochemical devices |
| CN112655110A (en) * | 2018-11-01 | 2021-04-13 | 株式会社Lg化学 | Separator and electrochemical device comprising the same |
| CN112795184A (en) * | 2020-12-30 | 2021-05-14 | 珠海冠宇电池股份有限公司 | Polymer particle, diaphragm containing polymer particle and lithium ion battery |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5682737B2 (en) * | 2012-03-22 | 2015-03-11 | 日本ゼオン株式会社 | Porous membrane for secondary battery and method for producing the same, electrode for secondary battery, separator for secondary battery, and secondary battery |
| CN104170121B (en) * | 2012-03-28 | 2016-08-24 | 日本瑞翁株式会社 | Secondary cell perforated membrane and manufacture method, electrode for secondary battery, secondary cell dividing plate and secondary cell |
| KR102005869B1 (en) * | 2016-06-30 | 2019-07-31 | 삼성에스디아이 주식회사 | Separator for rechargeable battery and rechargeable lithium battery including the same |
| CN109983599B (en) * | 2016-11-24 | 2022-12-16 | 日本瑞翁株式会社 | Nonaqueous secondary battery, composition for functional layer, and functional layer |
| KR102647260B1 (en) * | 2018-07-02 | 2024-03-13 | 에스케이이노베이션 주식회사 | Composite membrane for secondary battery |
| US11569489B2 (en) * | 2018-07-24 | 2023-01-31 | Zeon Corporation | Slurry for non-aqueous secondary battery and method of producing same, battery member for non-aqueous secondary battery and method of producing same, and non-aqueous secondary battery |
| CN113381125B (en) * | 2021-07-13 | 2023-02-17 | 上海恩捷新材料科技有限公司 | Ion-conductive functional resin and lithium battery diaphragm containing same |
-
2021
- 2021-07-13 CN CN202110787759.9A patent/CN113381125B/en active Active
-
2022
- 2022-04-19 WO PCT/CN2022/087620 patent/WO2023284348A1/en unknown
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0931297A (en) * | 1995-07-24 | 1997-02-04 | Gantsu Kasei Kk | Water-dispersible composition and its production |
| CN101373345A (en) * | 2007-08-23 | 2009-02-25 | 施乐公司 | Method for making emulsion aggregation particles using core-shell polymer nanoparticles |
| CN104685681A (en) * | 2012-09-28 | 2015-06-03 | 古河电气工业株式会社 | Collector, electrode structure, nonaqueous electrolyte battery, conductive filler, and electricity storage component |
| CN103146161A (en) * | 2013-03-29 | 2013-06-12 | 浙江海正生物材料股份有限公司 | Modified polylactic resin composition as well as preparation method and application thereof |
| CN106977669A (en) * | 2017-05-08 | 2017-07-25 | 南通艾德旺化工有限公司 | Nuclear-shell structure type ACR resins and preparation method thereof |
| CN112055883A (en) * | 2018-03-02 | 2020-12-08 | 阿科玛股份有限公司 | Fluoropolymer binder coatings for use in electrochemical devices |
| CN112655110A (en) * | 2018-11-01 | 2021-04-13 | 株式会社Lg化学 | Separator and electrochemical device comprising the same |
| CN111599969A (en) * | 2020-05-29 | 2020-08-28 | 东莞市溢兴新材料科技有限公司 | PVDF (polyvinylidene fluoride) -coated lithium ion battery diaphragm and preparation method thereof |
| CN112795184A (en) * | 2020-12-30 | 2021-05-14 | 珠海冠宇电池股份有限公司 | Polymer particle, diaphragm containing polymer particle and lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023284348A1 (en) * | 2021-07-13 | 2023-01-19 | 上海恩捷新材料科技有限公司 | Ion-conducting functional resin and lithium battery separator containing same |
| CN113929827A (en) * | 2021-09-16 | 2022-01-14 | 深圳知行新能源材料科技有限公司 | Battery coating material and preparation method thereof, battery coating slurry and secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023284348A1 (en) | 2023-01-19 |
| CN113381125B (en) | 2023-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6463785B2 (en) | Separation membrane for battery including gel polymer layer | |
| CN113381125B (en) | Ion-conductive functional resin and lithium battery diaphragm containing same | |
| US20210265702A1 (en) | Composite lithium battery separator and preparation method therefor | |
| CN103474609B (en) | A kind of folded painting composite lithium battery membrane | |
| CN1783543B (en) | Porous film and its producing method, battery producing method and electrode/porous film assembly | |
| CN112020784B (en) | Separator for electrochemical device and electrochemical device comprising same | |
| CN109964338A (en) | A kind of lithium ion battery multilayer complex functional diaphragm | |
| CN108711605A (en) | A kind of composite battery separator film, preparation method and battery | |
| CN103571420B (en) | Adhesive for ceramic membrane coating of lithium ion battery and preparation method of adhesive | |
| JP2015043318A (en) | Method for manufacturing separator, separator formed by the same, and method for manufacturing electrochemical element comprising the separator | |
| CN100370639C (en) | Porous membrane for crosslinking polymer support of battery separator and method for manufacturing battery employing the same | |
| CN113488661B (en) | Composite current collector for lithium battery, preparation method of composite current collector and lithium battery | |
| CN112366422A (en) | Non-porous diaphragm and application thereof | |
| CN113273005A (en) | Secondary battery, device comprising same, method for producing secondary battery, and binder composition | |
| JP2009110683A (en) | Porous film having reactive polymer layer thereon for use in battery separator, and use of it | |
| CN111244368A (en) | Ceramic diaphragm with good bonding property, preparation method thereof and lithium ion battery comprising ceramic diaphragm | |
| JP5260075B2 (en) | Reactive polymer-supported porous film for battery separator and electrode / separator assembly obtained therefrom | |
| CN115117560A (en) | Lithium-supplementing composite isolating membrane and preparation method and application thereof | |
| CN113067100A (en) | Water-based PVDF (polyvinylidene fluoride) coated lithium ion battery diaphragm and preparation method thereof | |
| CN110783515B (en) | High-wettability lithium ion battery diaphragm | |
| JP5260074B2 (en) | Battery separator and electrode / separator assembly obtained therefrom | |
| KR20210049554A (en) | Separator for lithium secandary battery, and lithium secandary battery containing the same | |
| CN114243207A (en) | Preparation method of ultraviolet-curing modified polyolefin battery diaphragm | |
| CN114335902A (en) | Composite diaphragm and preparation method and application thereof | |
| CN114303281A (en) | Battery separator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230714 Address after: No. 86, Caiqiu Road, Duodao District, Jingmen City, Hubei Province, 448000 Patentee after: Hubei Enjie New Material Technology Co.,Ltd. Address before: 201306 No. 155 Nanlu Highway, Pudong New Area, Shanghai Patentee before: SHANGHAI ENJIE NEW MATERIAL TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |