Preparation of composite alkaline polymer electrolyte

A composite solid-state polymer electrolyte composed of PVA polymer with a glass-fiber-cloth mat, KOH and H2O, was prepared by a solution casting method. The ionic conductivity of alkaline composite PVA polymer electrolyte is about 0.047 S cm(-1) at room temperature. The characteristic properties of composite PVA polymer electrolyte films were studied by DSC, TGA, SEM, cyclic voltammetry, and AC impedance method. The PVA polymer electrolytes combined with glass-fiber-cloth mat show an excellent mechanical strength and high ionic conductivity. The electrochemical stability window at the metal/electrolyte interface is of +/-1.2 V for stainless steel electrode. (C) 2002 Elsevier Science B.V. All rights reserved.