Reactive polymer-supporting porous film for battery separator and use thereof
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United States of America Patent
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Nov 22, 2011
Grant Date -
Sep 29, 2011
app pub date -
Jun 3, 2011
filing date -
Aug 26, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reactive polymer-supporting porous film is provided as a battery separator which comprises a porous substrate film and a partially crosslinked reactive polymer supported on the porous substrate film. The partially crosslinked reactive polymer is obtained by the reaction of a crosslinkable polymer having at least one group selected from the 3-oxetanyl group and epoxy group reactive with a polycarboxylic acid. The reactive polymer-supporting porous film has a separator and electrodes sufficiently bonded to each other and with low inner resistance suitably used for production of battery excellent in high rate performance. Further, provided is a method of producing a battery which comprises placing the electrode/reactive polymer-supporting porous film layered body in a battery container; introducing an electrolytic solution containing a cationic polymerization catalyst into the battery container thereby bonding the porous film and electrodes together.
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