Patent ID: 9088051
Filing Date: 2015-07-21
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A positive electrode protective layer composition of a rechargeable lithium battery, comprising: a polymer compound selected from the group consisting of ester-containing polymer compounds; and an ionic liquid including a borate-based anion, wherein the polymer compound and the borate-based anion are configured to be linked to each other and reduce elution of transition elements from a positive electrode, wherein the ester-containing polymer compound is selected from the group consisting of substituted and unsubstituted carboxylate-containing polymer compounds, substituted and unsubstituted (meth) acrylate-containing polymer compounds, and combinations thereof, wherein the composition further comprises a solvent, wherein the polymer compound, the ionic liquid, and the solvent of the positive electrode protective layer composition are included at about 1 wt% to 20 wt%, about 1wt% to 10 wt%, and about 70 wt% to 98 wt%, respectively, based on the total weight of the positive electrode protective layer composition.