Separator film for batteries including oxidation resistant vinyl alcohol copolymer
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United States of America Patent
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Sep 22, 2015
Grant Date -
Jun 11, 2009
app pub date -
Nov 19, 2008
filing date -
Nov 20, 2007
priority date (Note) -
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Abstract
A separator film for an electric battery is provided to substantially eliminate electric contact between an anode component and a cathode component. The film includes a vinyl alcohol copolymer with functional comonomer units such as sulfonic acid functionalized units or salts thereof. The films are desirable for use in battery separators because they exhibit superior resistance to degeneration by oxidation, enabling the manufacture of batteries with improved conductivity, longer discharge times, and longer cycle lives.
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