SEPARATOR, AND SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Oct 22, 2013
filing date -
Oct 22, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention aims to provide a separator having a high ion conductivity and excellent durability, and a secondary battery. The present invention relates to a separator including a layer that includes a fluoropolymer including a polymer unit based on vinylidene fluoride and a polymer unit based on tetrafluoroethylene, and a porous membrane. The fluoropolymer includes 80.0 to 89.0 mol % of the polymer unit based on vinylidene fluoride in all the polymer units, and has a weight average molecular weight of 50000 to 2000000.
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