Thermal and complex impedance analysis of amorphous and crystalline lithium salt mixtures

Abstract

Amorphous electrolytes consisting of the lithium salts, Li[R-NSO 2CF 3] were prepared and the attendant low ionic conductivities of the lithium salt mixtures (∼1×10 −6 S cm −1 at room temperature) are attributed to high glass transition temperatures. An example is the novel amorphous salt, Li[18-C-6NSO 2CF 3] which produces an amorphous salt mixture with Li[N(SO 2CF 3) 2] (LiTFSI).