Chemical Oxidation of LiFePO4 in Aqueous Medium as a Method for Studying Kinetics of Delithiation

Andrey Kurbatov, Fyodor Malchik, Alina Galeyeva, D. S. Davydchenko, A. K. Rakhimova, Maxim Lepikhin, Duisek Kamysbayev

2018

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DOI 10.1134/s1023193518030072
Data confidence 70 medium
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Abstract

The kinetics of LiFePO 4 oxidation by hydrogen peroxide in aqueous alkaline medium is studied with the use of potentiometric determination of lithium concentration in solution during delithiation. It is demonstrated that the lithium transfer through the reaction-product layer is controlled by diffusion. The activation energy and the diffusion coefficient of the species transferred in the solid phase during the chemical reaction of oxidative delithiation are determined and the parameters of this processes are analyzed.