Nonaqueous electrolyte secondary battery insulating porous layer
A nonaqueous electrolyte secondary battery insulating porous layer usable as a member of a nonaqueous electrolyte secondary battery having an excellent cycle characteristic is provided. A nonaqueous electrolyte secondary battery insulating porous layer includes a thermoplastic resin, porosity of the nonaqueous electrolyte secondary battery insulating porous layer being not less than 25% and not more than 80%, and a ratio of a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at tenth loading-unloading cycle to a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at fiftieth loading-unloading cycle being not less than 100% and less than 115%.
1. A nonaqueous electrolyte secondary battery insulating porous layer comprising a thermoplastic resin,
porosity of the nonaqueous electrolyte secondary battery insulating porous layer being not less than 25% and not more than 80%,
a ratio of a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at tenth loading-unloading cycle to a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at fiftieth loading-unloading cycle being not less than 100% and less than 115%,
the thermoplastic resin being a mixture of an aromatic polyester and an aromatic polyamide,
a weight of the aromatic polyester being not less than 20% by weight and not more than 75% by weight with respect to a total weight of the aromatic polyester and the aromatic polyamide being 100% by weight, and
a thickness of the nonaqueous electrolyte secondary battery insulating porous layer being 0.5 μm to 15 μm.
2. A nonaqueous electrolyte secondary battery laminated separator comprising:
a polyolefin porous film; and
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 .
3. A nonaqueous electrolyte secondary battery member comprising:
a cathode;
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 ; and
an anode,
the cathode, the nonaqueous electrolyte secondary battery insulating porous layer, and the anode being arranged in this order.
4. A nonaqueous electrolyte secondary battery comprising:
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 .
5. A nonaqueous electrolyte secondary battery member comprising:
a cathode;
a nonaqueous electrolyte secondary battery laminated separator recited in claim 2 ; and
an anode,
the cathode, the nonaqueous electrolyte secondary battery laminated separator, and the anode being arranged in this order.
6. A nonaqueous electrolyte secondary battery comprising:
a nonaqueous electrolyte secondary battery laminated separator recited in claim 2 .