Abstract
The characteristics of composite polymer electrolytes obtained by adding powders of a stable ceramic material
having a regular spherical shape with a mean diameter of less than 1 μm, to a poly(ethylene oxide)‐lithium perchlorate complex, are described in terms recrystallization, conductivity, and ion transport number. The addition of the finely dispersed ceramic powder greatly improves the morphological and the electrochemical properties of the polymer electrolytes.