发明名称 |
HIGH PERFORMANCE SEPARATOR FOR LITHIUM POLYMER SECONDARY BATTERY FRIENDLY TO LIQUID ELECTROLYTE, PREPARATION METHOD THEREOF AND LITHIUM POLYMER SECONDARY BATTERY |
摘要 |
PURPOSE: A high performance separator for a lithium polymer secondary battery is provided, which is friendly to a liquid electrolyte and can induce pore-closing at a fixed temperature or higher. And a preparation method of the separator and the lithium polymer secondary battery are also provided. CONSTITUTION: The separator has a fine porous structure and is produced by a process comprising the steps of: dissolving a copolymer of polyvinylidene fluoride or/and vinylidene fluoride and 1-30wt% of hexafluoropropylene in a solvent, wherein the polyvinylidene fluoride has a weight average molecular weight of 10,000-1,000,000; dispersing a polyolefin fiber material in the resultant solution to prepare a mixture solution, wherein the polyolefin fiber material comprises polyethylene or/and polypropylene; casting the mixture solution on a substrate; melting the solvent from the cast slurry and drying. And the lithium polymer secondary battery contains a polymer electrolyte produced by impregnating the separator with a liquid electrolyte.
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申请公布号 |
KR20040099895(A) |
申请公布日期 |
2004.12.02 |
申请号 |
KR20030032029 |
申请日期 |
2003.05.20 |
申请人 |
FINEPOL CO., LTD. |
发明人 |
KIM, JUN U;LEE, HYEONG CHUN;LEE, YONG GI |
分类号 |
H01M2/16;(IPC1-7):H01M2/16 |
主分类号 |
H01M2/16 |
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