Determination of the Lithium Ion Transference Number and of the Electrochemical Stability Stability Window

摘要

In this two month period, we have continued the investigation of the electrochemical properties of gel-type polymer electrolytes formed by the immobilization of liquid solutions in poly(acrylonitrile), PAN matrices. The aim was that of completing task (i) which is focused on the clarification and the understanding of the basic electrochemical properties of these new gel electrolytes. In particular in this report we discuss results related to the lithium ion transference number and to the electrochemical stability window.In this 5th two-month period we have synthesized and characterized new types of gel electrolytes formed by trapping solutions of lithium salts in a poly(methylmethacrylate), PMMA matrix. In this report we describe the conductivity, the lithium ion transference number and the electrochemical stability of these PMMA-base electrolyte membranes. In the following two- month period we will investigate the phenomena occurring at the interface between these membranes and the lithium metal electrode.