Porous layer, laminated body, nonaqueous electrolyte secondary battery member including the porous layer, and nonaqueous electrolyte secondary battery including the porous layer
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United States of America Patent
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Jun 5, 2018
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Sep 30, 2016
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Oct 2, 2015
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Abstract
The present invention provides, as a porous layer that can be used for a member for a nonaqueous secondary battery having excellent shutdown characteristics, a porous layer including a polyvinylidene fluoride-based resin, wherein, assuming that a sum of individual amounts of crystal form α and crystal form β contained in the polyvinylidene fluoride-based resin is 100 mol %, the amount of crystal form α contained in the polyvinylidene fluoride-based resin is not less than 10 mol % and not more than 65 mol %.
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