The Analysis of Lithium Diffusion in the Cathode Material Particles of Primary Lithium-Manganese Cells by Measuring Electrochemical Noise and Magnetoresistance Relaxation.

Abstract

The process of lithium diffusion in the cathode material of lithium-manganese chemical power sources (CPS) after a short-term discharge are analyzed by an analyzing of the relaxation parameters of electrochemical noise and the magnitude of the magnetoresistance of the layer of injected lithium. It is shown that fluctuations in the diffusion flow of lithium are the source of electrochemical noise in such CPS. The data obtained also confirm the assumption made in the literature about the formation of a poorly conducting phase with a spinel crystal structure during the discharge of an element in the surface layer of MnO2 particles, which inhibits the diffusion process.