CN103539959A - Preparation method of polymer diaphragm of lithium ion battery - Google Patents
Preparation method of polymer diaphragm of lithium ion battery Download PDFInfo
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- CN103539959A CN103539959A CN201210239530.2A CN201210239530A CN103539959A CN 103539959 A CN103539959 A CN 103539959A CN 201210239530 A CN201210239530 A CN 201210239530A CN 103539959 A CN103539959 A CN 103539959A
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- lithium ion
- preparation
- polymer diaphragm
- polyacrylonitrile
- battery
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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 preparation method of a polymer diaphragm of a lithium ion battery, which relates to the field of lithium ion batteries. According to the formula, the polymer diaphragm comprises polyacrylonitrile, deionized water, ethylene carbonate and ammonium bicarbonate in a weight ratio of (3-13):(61-91):(3-13):(3-13). The fabrication process in the preparation method comprises the steps of weighing, stirring, coating, pore-forming and rolling. In the formula, the polyacrylonitrile can be replaced with gelatin. The polymer diaphragm has strong electrolyte containing capacity, no free electrolyte can be discovered after the anatomy of the battery, and no electrolyte flows out even if the battery is damaged, so that the environment is protected and the safety is ensured; the polymer diaphragm can be in good contact with the anode and the cathode and can be chemically bonded with the anode and the cathode, the contact is tight, the interface resistance is small, the internal resistance of the battery is small, and the charge and discharge properties and the cryogenic property of the battery are greatly increased.
Description
Technical field:
The present invention relates to lithium ion battery field, be specifically related to the preparation method of polymer diaphragm for lithium ion cell.
Background technology:
Conventional membrane is held electrolytic solution ability, causes the electrolytic solution of a lot of free states to be present in inside battery, once battery breakage just has liquid electrolyte outflow, and contaminate environment, liquid state organic electrolyte is inflammable simultaneously, holds fire hazardous.Or at battery, by hard thing, pierced through, in the short circuit of inside and outside, inflammable free state electrolytic solution is potential safety hazard greatly often.And conventional membrane contacts bad with positive and negative electrode, contact is each other all by pressing physically, and this just causes the internal resistance of battery larger, and discharge performance, low-temperature performance are poor.
Summary of the invention:
The preparation method who the object of this invention is to provide polymer diaphragm for lithium ion cell, the ability that it can hold electrolytic solution is strong, and battery can not found the electrolytic solution of free state after dissecting, even if battery is damaged, do not have electrolytic solution to flow out, both protected environment, guaranteed again safety yet; And contact with positive and negative electrode well, chemical bonding with it, closely, interface resistance is little in contact, and the internal resistance of cell is little, and charge-discharge performance, low-temperature performance have very big raising.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: its formulation weight ratio is: polyacrylonitrile: deionized water: NSC 11801: bicarbonate of ammonia=3～13: 61～91: 3～13: 3～13.
Its manufacture craft is:
1, weigh: with electronic scales, take various materials.
2, stir: by various mixing of materials, in stirrer, fully stir into composition profiles homogeneous, stable mixed slurry.
3, coating: polyolefins barrier film, by holding the container of mixed slurry, is started to coating machine, barrier film is moved along machine direction, the hot blast that simultaneously it is applied to certain temperature, makes it dry.
4, pore-creating: dried barrier film, by filling the container of alcohol or acetone, is manufactured the micropore being evenly distributed in its surface.
5, rolling: at the tail of coating machine, the membrane for polymer after drying is rolled.
Polyacrylonitrile during described formula forms is replaceable is gelatin.
The present invention has following beneficial effect:
1, hold the ability of electrolytic solution strong, battery can not found the electrolytic solution of free state after dissecting, even if battery is damaged, there is no electrolytic solution outflow yet, has both protected environment, has guaranteed again safety.
2, contact with positive and negative electrode well, chemical bonding with it, closely, interface resistance is little in contact, and the internal resistance of cell is little, and charge-discharge performance, low-temperature performance have very big raising.
Embodiment:
The concrete embodiment one of implementing: this embodiment by the following technical solutions: its formulation weight ratio is: polyacrylonitrile: deionized water: NSC 11801: bicarbonate of ammonia=3～13: 61～91: 3～13: 3～13.
Its manufacture craft is:
1, weigh: with electronic scales, take various materials.
2, stir: by various mixing of materials, in stirrer, fully stir into composition profiles homogeneous, stable mixed slurry.
3, coating: polyolefins barrier film, by holding the container of mixed slurry, is started to coating machine, barrier film is moved along machine direction, the hot blast that simultaneously it is applied to certain temperature, makes it dry.
4, pore-creating: dried barrier film, by filling the container of alcohol or acetone, is manufactured the micropore being evenly distributed in its surface.
5, rolling: at the tail of coating machine, the modification composite diaphragm after drying is rolled.
Embodiment two: this embodiment is that with embodiment one difference its formulation weight ratio is: polyacrylonitrile: deionized water=3～6: 94～97; Its manufacture craft is all identical with embodiment one.
Embodiment three: this embodiment is that with embodiment one difference its formulation weight ratio is: polyacrylonitrile: deionized water: NSC 11801=3～13: 74～94: 3～13; Its manufacture craft is all identical with embodiment one.
Embodiment four: this embodiment and embodiment one, two, three differences be the polyacrylonitrile of described formula in forming replaceable be gelatin, it prepares recipe ratio and manufacture craft is all identical with embodiment one.
Claims (4)
1. the preparation method of polymer diaphragm for lithium ion cell, is characterized in that its formulation weight ratio is: polyacrylonitrile: deionized water: NSC 11801: bicarbonate of ammonia=3～13: 61～91: 3～13: 3～13; Its manufacture craft is: 1, weigh: with electronic scales, take various materials; 2, stir: by various mixing of materials, in stirrer, fully stir into composition profiles homogeneous, stable mixed slurry; 3, coating: polyolefins barrier film, by holding the container of mixed slurry, is started to coating machine, barrier film is moved along machine direction, the hot blast that simultaneously it is applied to certain temperature, makes it dry; 4, pore-creating: dried barrier film is by filling the container of organic solvent, and this solution can be the one or more kinds of mixtures of NMP (N-Methyl pyrrolidone), ethanol or acetone, manufactures the micropore being evenly distributed in its surface; 5, rolling: at the tail of coating machine, the membrane for polymer after drying is rolled.
2. the preparation method of polymer diaphragm for lithium ion cell according to claim 1, is characterized in that its formulation weight ratio is: polyacrylonitrile: deionized water=3～6: 94～97.
3. the preparation method of polymer diaphragm for lithium ion cell according to claim 1, is characterized in that its formulation weight ratio is: polyacrylonitrile: deionized water: NSC 11801=3～13: 74～94: 3～13.
4. the preparation method of polymer diaphragm for lithium ion cell according to claim 1, it is characterized in that described polyacrylonitrile replaceable be gelatin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239530.2A CN103539959A (en) | 2012-07-10 | 2012-07-10 | Preparation method of polymer diaphragm of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239530.2A CN103539959A (en) | 2012-07-10 | 2012-07-10 | Preparation method of polymer diaphragm of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103539959A true CN103539959A (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210239530.2A Pending CN103539959A (en) | 2012-07-10 | 2012-07-10 | Preparation method of polymer diaphragm of lithium ion battery |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161691A (en) * | 1994-10-22 | 1997-10-08 | 大金工业株式会社 | Conjugated N-fluoropyridinium salt polymer and use thereof |
| CN101626097A (en) * | 2009-06-05 | 2010-01-13 | 长沙高新开发区材盛新能源科技有限公司 | High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof |
| CN102487132A (en) * | 2010-12-01 | 2012-06-06 | 徐亮良 | Battery diaphragm |
-
2012
- 2012-07-10 CN CN201210239530.2A patent/CN103539959A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161691A (en) * | 1994-10-22 | 1997-10-08 | 大金工业株式会社 | Conjugated N-fluoropyridinium salt polymer and use thereof |
| CN101626097A (en) * | 2009-06-05 | 2010-01-13 | 长沙高新开发区材盛新能源科技有限公司 | High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof |
| CN102487132A (en) * | 2010-12-01 | 2012-06-06 | 徐亮良 | Battery diaphragm |
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Application publication date: 20140129 |