A THEORETICAL-MODEL FOR COMPOSITE ELECTROLYTES .1. SPACE-CHARGE LAYERAS A CAUSE FOR CHARGE-CARRIER ENHANCEMENT

The present paper focuses on the reason for the formation of the space charge layer as the cause of the ionic conductivity enhancement in co mposite electrolytes. A rigorous analytical solution for the formation of the space charge layer is presented. The formation of the space ch arge layer is assumed to originate from the formation of a thin amorph ous phase by a defect reaction at the interface between the second pha se and the matrix. The electric potential distribution, ionic defect d istributions, and the average densities of ionic defects in the space charge layer are deduced in analytical forms. An enormous enhancement of the density of the mobile ionic defects in the space charge layer i s derived for the first time in an analytical form.