| 摘要 |
PURPOSE:To provide a solid polymer electrolyte composed of ceramic fine particles having alkali metal sulfonate group, a matrix polymer and an alkali metal salt electrolyte substance, having high ionic conductance and useful for cells, various sensors, etc. CONSTITUTION:The objective solid polymer electrolyte is composed of (A) fine particles produced by bonding an alkali metal sulfonate group to the surface of fine particles of oxide ceramics (e.g. silica or alumina) having particle diameter of :<=1mum, (B) a matrix polymer having a glass transition point of <=-20 deg.C (preferably acrylic elastomer such as ethyl acrylate and 2-methoxyethyl acrylate) and (C) an alkali metal salt electrolyte substance compatible with the component B and containing the same kind of alkali metal as the metal salt of the component A (preferably perchlorate, quaternary ammonium salt, etc.). The amounts of the components A and B are 20-70vol.% and 30-80vol.%, respectively, and the amount of the component C is 0.5-60vol.% based on the composite material. |
