| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic/inorganic composite porus film which does not dissolve in fluorine ions, or the like, even at high temperatures at which a battery itself is dissolved and broken down, includes a structure in which a separator frame is not molten down, is highly safe, and can be used for a separator for a nonaqueous electrolyte secondary battery. SOLUTION: The organic/inorganic composite porus film is formed by coating heat resistant resin material on inorganic porus material as a frame. The inorganic porus material is formed of glass fiber and/or ceramic fiber, and the heat-resistant resin preferably contains either of polyamide, polyamide acid, polyimide. COPYRIGHT: (C)2011,JPO&INPIT
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