Abstract
Organic-Inorganic composites were prepared as lithium ion conducting materials. Organic thermo-elastic co-polymer SEPS (styrene-ethylene-propylene-styrene) and inorganic lithium ion conductor a-60Li2S⋅0SiS2 (mol%), which was prepared by mechanical milling processes, were used as raw materials for the preparation of the composite materials. The mixture of the raw materials were heated at 90°C under a pressure of about 3×107 Pa for 1 h to obtain the composite materials in sheet shape. The obtained composite sheet containing 7wt% of SEPS showed ion conductivity 4.9×10-5 Scm-1 at room temperature. Electronic polarization measurements suggested that the main carrier of the composite sheet was lithium ions and that the ion transport number of the sheet was almost unity.
