US2017125767A1PendingUtilityA1
Laminated separator for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery member, and nonaqueous electrolyte secondary battery
Est. expiryOct 29, 2035(~9.3 yrs left)· nominal 20-yr term from priority
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Claims
Abstract
The present invention provides a laminated separator, for a nonaqueous electrolyte secondary battery, (i) including a porous film and a porous layer containing a polyvinylidene fluoride-based resin and (ii) having an excellent rate characteristic. The laminated separator includes: the porous film containing a polyolefin-based resin as a main component; and the porous layer containing the polyvinylidene fluoride-biased, resin, a surface of the porous layer having a 60 -degree specular gloss of 3 % to 26 %.
Claims
exact text as granted — not AI-modified1 . A laminated separator for a nonaqueous electrolyte secondary battery, comprising:
a porous film containing a polyolefin-based resin as a main component; and a porous layer containing a polyvinylidene fluoride-based resin, a surface of the porous layer having a 60-degree specular gloss of 3% to 26%,
2 . The laminated separator as set forth in claim 1 , wherein the porous layer contains a filler at a proportion of 1% by mass to 30% by mass with respect to a total amount of the polyvinylidene fluoride-based resin and the filler.
3 . The laminated separator as set forth in claim 1 , wherein the porous film has piercing strength of not less than 2 N.
4 . The laminated separator as set forth in claim 1 , wherein the porous film has an average pore diameter of not more than
5 . The laminated separator as set forth in claim 1 , wherein the polyvinylidene fluoride-based resin is (i) a copolymer of vinylidene fluoride and at least one monomer selected from a group consisting of hexafluoropropylene, tetrafluoroethylene, trifluoroethylene, trichloroethylene, and vinyl fluoride, (ii) a homopolymer of vinylidene fluoride, or (iii) a mixture thereof.
6 . A nonaqueous electrolyte secondary battery member comprising:
a cathode; a laminated separator recited in claim 1 ; and an anode, the cathode, the laminated separator, and the anode being disposed in this order.
7 . A nonaqueous electrolyte secondary battery comprising a laminated separator recited in claim 1 .Join the waitlist — get patent alerts
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