发明名称 |
Battery separator, process for producing the same, and alkaline battery |
摘要 |
A battery including a separator having a satisfactory ammonia trapping property is speculated to exhibit a less self-discharge and a higher capacity-holding rate. The ammonia trapping property is speculated to be increased with an increasing degree of sulfonation of a constitutive polyolefin fiber. However, a highly sulfonated conventional polyolefin has a deteriorated fiber strength and highly sulfonated portions thereof are peeled or eliminated, and the resulting fiber cannot have a significantly high degree of sulfonation. The invention is therefore intended to provide a separator having an improved ammonia trapping property. The invented separator includes a polyolefin resin fiber having large amounts of introduced sulfonic groups. Specifically, the separator is one containing a fiber obtained by sulfonating a polyolefin resin fiber having an intrinsic viscosity number of 0.2 to 1.0 dl/g, one including a fiber obtained by sulfonating a polyolefin resin fiber and having a BET specific surface area of 0.5 m2/g or more, or one including a fiber obtained by oxidizing a polyolefin fiber and sulfonating the oxidized fiber.
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申请公布号 |
US2002160260(A1) |
申请公布日期 |
2002.10.31 |
申请号 |
US20020117106 |
申请日期 |
2002.04.08 |
申请人 |
TANAKA TOSHIO;YAMAGUCHI HIROKI;TAKIMOTO NAOHIKO;YAMASHITA MASAHIRO;HAMAMOTO SHIRO |
发明人 |
TANAKA TOSHIO;YAMAGUCHI HIROKI;TAKIMOTO NAOHIKO;YAMASHITA MASAHIRO;HAMAMOTO SHIRO |
分类号 |
H01M2/16;(IPC1-7):H01M2/18 |
主分类号 |
H01M2/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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