Ionically conductive thin polymer films prepared by plasma polymerization, part 9: Vapor‐phase preparation of solid polymer electrolytes composed of plasma polymer and lithium trifluoromethanesulfonate

Solid polymer electrolytes composed of plasma‐polymerized dimethyl‐2‐[(2‐ethoxy‐ethoxy)ethoxy]vinylsilane and thermal vapor‐deposited lithium trifluoromethanesulfonate have been prepared, and characterized using electron spectroscopy for chemical analysis (ESCA), Fourier transform/infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and electrochemical techniques. The obtained solid polymer electrolyte films of about 1 μm thickness were uniform and pinhole‐free. Room temperature conductivity of 8 × 10 −6 S/cm has been observed. This value depends on the substrate temperature during the plasma polymerization, and the variation of the ionic conductivity with temperature can be described by using a Williams–Landel–Ferry equation.