Solid-state composite electrolytes comprising aramid polymer fibrils

Abstract

A solid-state composite electrolyte, suitable for use in solid-state batteries, and a battery comprising same, the solid-state composite electrolyte comprising 70 to 99 weight percent inorganic solid electrolyte and 1 to 30 weight percent aramid polymer fibrils, based on the total weight of the inorganic solid electrolytes and aramid fibrils in the solid-state composite electrolyte, wherein the aramid polymer fibrils have: i) a diameter of 10 to 2000 nanometers,ii) a length of 0.2 to 3 millimeters,iii) a specific surface area of 3 to 40 square meters/gram, andiv) a Canadian Standard Freeness of 0 to 100 milliliters; the solid-state composite electrolyte having a thickness of 5 to 1000 micrometers.

CPC Classifications