Patent ID: 8802271
Filing Date: 2014-08-12
Classification: H01M,Y02E

Abstract:
1. A separator for non-aqueous batteries comprising a laminate, comprising: a low melting-point polymer fiber layer (A) comprising a low melting-point polymer having a melting point of 100 to 200° C., the low melting-point polymer fiber layer (A) comprising nanofibers having a fiber diameter of 1000 nm or smaller and formed from the low melting-point polymer; and a heat-resistant polymer fiber layer (B) positioned on the low melting-point polymer fiber layer (A) and comprising a heat-resistant polymer selected from the group consisting of a high melting-point polymer having a melting point over 200° C. and a heat infusible polymer, the heat-resistant polymer fiber layer (B) comprising a mixture of nanofibers having a fiber diameter of 1000 nm or smaller and non-nanofibers having a fiber diameter over 1000 nm and both formed from the heat-resistant polymer.