Patent ID: 8673503
Filing Date: 2014-03-18
Classification: C08G,C08K,C08L,H01G,H01M,Y02E

Abstract:
1. A gel electrolyte comprising: a polymer in about 20 to about 70 wt %; a lithium salt in about 1 to about 8 wt. %; and a solvent comprising a carbonate solvent, a lactone solvent, or a mixture thereof; wherein the polymer is a polyurethane prepared from a poly(alkyleneoxide) triol and a diisocyanate compound, the polymer is sufficiently cross-linked to form a gel in the presence of the solvent, the poly(alkyleneoxide) triol is selected from: where m, n, and p are selected to form a polymer having molecular weight of about 1,000 to 100,000 g/mol.