发明名称 |
Battery separators |
摘要 |
There is described a battery separator comprising: a porous membrane (preferably of a cellulose film) having a mean thickness less than about 25 microns (preferably 15 microns) and optionally with one or more of the following properties: a) a tensile strength when dry (measured in the transverse direction of the membrane web) of greater than about 120 Nmm<-2>; b) a wet ionic resistance of less than about 20 mOmega.cm<2>; c) a membrane degree of polymerisation (D.P.) of greater than 350 chain units after being immersed for four hours in a bath of sodium hydroxide and hydrogen peroxide; and/or a) a tensile strength when dry (measured in the machine direction of the membrane web) of greater than about 200 Nmm<-2>. Preferred membranes comprise biopolymeric films, such as films derived from cellulose and/or polylactic acid, more preferably a regenerated cellulosic film made using NMMO as regeneration liquid.
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申请公布号 |
US2004234862(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
US20040477181 |
申请日期 |
2004.02.23 |
申请人 |
MACGLASHAN GRAHAM;MARSHALL COLIN;READ SIMON |
发明人 |
MACGLASHAN GRAHAM;MARSHALL COLIN;READ SIMON |
分类号 |
H01M2/14;H01M2/16;(IPC1-7):H01M2/14 |
主分类号 |
H01M2/14 |
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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