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    • 5. 发明申请
    • NONAQUEOUS SECONDARY BATTERY SEPARATOR AND PROCESS FOR ITS FABRICATION
    • 非等级二次电池分离器及其制造工艺
    • US20100143783A1
    • 2010-06-10
    • US11996675
    • 2005-07-25
    • Satoshi NishikawaHiroyuki HonmotoTakahiro Daido
    • Satoshi NishikawaHiroyuki HonmotoTakahiro Daido
    • H01M2/14
    • B32B27/08B32B27/32B32B27/34B32B27/36B32B2255/10B32B2255/26B32B2255/28B32B2307/306B32B2307/724B32B2323/00B32B2377/00B32B2457/00B32B2457/10B32B2457/16B32B2605/00H01M2/145H01M2/1653H01M2/1686H01M10/0525H01M2300/0094
    • This invention provides a separator for a nonaqueous rechargeable battery comprising a composite porous membrane that has both a shutdown function and heat resistance good enough to be effective for the suppression of meltdown, desired in a high-performance nonaqueous rechargeable battery having increased energy density, increased output, and increased size, and can realize a separator for a nonaqueous rechargeable battery having excellent handling properties and ion permeability. The composite porous membrane comprises a polyolefin microporous membrane having an air permeability per thickness of not less than 15 sec/100 cc·μm and not more than 50 sec/100 cc·μm (JIS P 8117) and a membrane thickness of not less than 5 μm and not more than 25 μm and a porous layer formed of poly-m-phenylene isophthalamide covering and integrated with both sides of the polyolefin microporous membrane. The composite porous membrane is characterized in that the composite porous membrane has a thickness of not less than 6 μm and not more than 35 μm and an air permeability (JIS P 8117) of not less than 1.01 times and not more than 2.00 times that of the polyolefine microporous membrane, and the coverage of poly-m-phenylene isophthalamide is not less than 1.0 g/m2 and not more than 4.0 g/m2.
    • 本发明提供了一种用于非水可再充电电池的隔膜,其包括复合多孔膜,其具有足够好的关闭功能和耐热性,以有效地抑制熔化,在具有增加的能量密度的高性能非水可再充电电池中是期望的 输出和增加的尺寸,并且可以实现具有优异的处理性能和离子渗透性的非水可再充电电池的隔膜。 复合多孔膜由聚烯烃微多孔膜构成,其膜厚为15sec / 100cc·m以上50sec / 100cc·μm以下(JIS P8117),膜厚不小于 5μm以上且25μm以下,由聚 - 间苯二甲酰间苯二胺形成的多孔层与聚烯烃微多孔膜的两面覆盖并整合。 复合多孔膜的特征在于,复合多孔膜的厚度为6μm以上且35μm以下,透气度(JIS P 8117)为不小于1.01倍且不大于2.00倍 聚烯烃微孔膜和聚间苯二甲酰间苯二胺的覆盖率不小于1.0g / m 2且不大于4.0g / m 2。