SEPARATOR FOR NONAQUEOUS ELECTROLYTE BATTERY, AND NONAQUEOUS ELECTROLYTE BATTERY

摘要

Provided is a separator for a nonaqueous electrolyte battery, which includes a porous substrate and an adhesive porous layer that is provided on at least one side of the porous substrate and contains an adhesive resin. The separator has a pore size distribution such that, as measured by a pore size distribution measurement test, the pore size at the maximum value of the maximum peak is within a range of 0.02 μm to 0.1 μm, and the pore size distribution range value ε defined as follows is 0.4 or less. The pore size distribution range value ε herein is a value calculated by the following equation from pore sizes D90, D10, and D50 corresponding to cumulative pore size distributions of 90%, 10%, and 50%, respectively:;pore size distribution range value ε=(D90−D10)/D50.

主权项

1. A separator for a nonaqueous electrolyte battery, comprising:
a porous substrate; and an adhesive porous layer that is provided on at least one side of the porous substrate and contains an adhesive resin, in the pore size distribution of the separator measured by a pore size distribution measurement test, the pore size at the maximum value of the maximum peak being within a range of 0.02 μm to 0.1 μm, the pore size distribution range value ε defined as follows being 0.4 or less: pore size distribution range value ε: a value calculated by the following equation from a pore size D90 corresponding to a cumulative pore size distribution of 90%, a pore size D10 corresponding to a cumulative pore size distribution of 10%, and a pore size D50 corresponding to a cumulative pore size distribution of 50%:
ε=(D90−D10)/D50.