POLYMER ELECTROLYTE FOR A SOLID STATE BATTERY

Provided is a composition containing a redox charge-transfer complex of an electron donor polymer and an electron acceptor compound where the anionic form of the electron acceptor has a reduction potential higher than the reduction potential of the electron donor polymer; at least one metal salt and at least one additive compound having a dielectric constant of 10 or greater. The composition is a free-flowing, substantially amorphous powder and is useful as a metal ion conducting component of electrolytic cells.