Ionically conductive thin polymer films prepared by plasma polymerization; V. preparation and characterization of solid polymer electrolyte composed of plasma polymerized tris(2-methoxyethoxy)vinylsilane-LiCiO sub 4 complex

Ultrathin, uniform, pinhole-free solid polymer electrolyte films of approximately 1 {mu}m thickness were prepared by the complexation of plasma-polymerized tris(2-methoxyethoxy)vinylsilane (TMVS) with LiClO{sub 4}. The results of FT-IR, {sup 1}H NMR, and {sup 13} C NMR measurements indicate that the structure of the plasma polymer is very similar to poly (TMVS), except for the presence of a small amount of what is probably a cycle group impurity. The glass transition temperature and ionic conductivity of the solid polymer electrolyte depend on the LiClO{sub 4} content, and the variation of the ionic conductivity with temperature can be described exactly by using a {ital WLF} type of equation. Room temperature conductivities greater than 10{sup {minus} 6} S cm{sup {minus} 1} (10{sup 2}{Omega} cm{sup 2} resistance per unit area) were observed.