Shrinking Core Model Formulation for the Electrochemical Performance Analysis of a Lithium/Carbon Monofluoride Cell

Abstract

A shrinking core model formulation has been developed based on lithium-ion diffusion through the product layer of carbon monofluoride cathode active material being the predominate mechanism controlling the cell discharge behavior. The formulation expresses the cell discharge time; speed of the moving reaction zone towards the center of a spherical active material, carbon monofluoride, particle; cell current, and the fractional amount of charge involved in the cell electrochemical reaction in terms of the fractional conversion of the cell cathode limiting reactant, carbon monofluoride. An experimental data-based correlation between the required, lithium-ion effective diffusivity and cell voltage loss is also provided to explain the cell discharge behavior under the constant current condition.