Abstract
The process of lithium diffusion in the cathode material of lithium–manganese chemical power sources after a short-term discharge is investigated by analyzing the relaxation parameters of electrochemical noise and the magnitude of the injected lithium layer Magnetoresistance. Fluctuations in the lithium diffusion flux are shown being the source of electrochemical noise in this chemical power source. The data obtained also confirm the assumption made in the literature about the formation, during the cell discharge, of a poorly conducting phase with a spinel crystal structure in the surface layer of MnO2 particles, which inhibits the diffusion process.
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The reported study was funded by the Russian Foundation of Basic Research according to the research project no. 20-03-00951 а, identifier AAAA-A20-120021890174-1).
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Translated by Yu. Pleskov
Based on the materials of the 16th International Meeting “Fundamental Problems of Solid State Ionics”, Chernogolovka, June 27–July 3, 2022.
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Ukshe, A.E., Astafev, E.A. Analysis of Lithium Diffusion in the Cathode Material Particles of Primary Lithium–Manganese Cells by the Measuring of Electrochemical Noise and Magnetoresistance Relaxation. Russ J Electrochem 59, 581–588 (2023). https://doi.org/10.1134/S1023193523080098
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DOI: https://doi.org/10.1134/S1023193523080098