A THEORETICAL-MODEL FOR COMPOSITE ELECTROLYTES .1. SPACE-CHARGE LAYER AS 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 composite electrolytes. A rigorous analytical solution for the formation of the space charge layer is presented. The formation of the space charge layer is assumed to originate from the formation of a thin amorphous phase by a defect reaction at the interface between the second phase and the matrix. The electric potential distribution, ionic defect distributions, 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 is derived for the first time in an analytical form.