リチウムイオン伝導性を有するa-60Li₂・40SiS₂非晶質体とSEPS熱可塑性エラストマーとの複合体の作製

抄録

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.