Separator and nonaqueous electrolyte battery

摘要

A separator is provided. The separator includes a base layer and a surface layer, wherein the surface layer is on at least one side of the base layer, and wherein the surface layer is structured so as to collapse at time of charging to prevent damage to a negative electrode due to expansion thereof. A battery including the separator is also provided. An electric device, an electric vehicle, and an electrical storage device including the battery are further provided.

主权项

1. A separator comprising:
a base layer; and a surface layer having a porous structure that contains a resin material and inorganic particles dispersed within the resin material, wherein the surface layer is on at least one side of the base layer, wherein the surface layer has a nonuniform thickness due to the inorganic particles forming a surface roughness that ranges from 1 micron to 4 microns, and wherein a ratio T/D is greater than or equal to 5, where T represents a thickness of the surface layer under a compressive load, and D represents a mean particle diameter of the inorganic particles.