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Zhuravlev V. D., Shchekoldin S. I., Andryushin S. E., Sherstobitova E. A., Nefedova K. V., Bushkova O. V. Electrochemical Characteristics and Phase Composition of Lithium-Manganese Oxide Spinel with Excess Lithium Li_(1 + x)Mn?O?. Electrochemical Energetics, 2020, vol. 20, iss. 3, pp. 157-?. DOI: 10.18500/1608-4039-2020-20-3-157-170, EDN: PFEWTC

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Electrochemical Characteristics and Phase Composition of Lithium-Manganese Oxide Spinel with Excess Lithium Li_(1 + x)Mn?O?

Zhuravlev Viktor Dmitrievich, Institute of Chemistry of a Solid body UB of RAS
Sherstobitova Elena Aleksandrovna, Institute of Chemistry of a Solid body UB of RAS
Nefedova Kseniya Valer'evna, Institute of Chemistry of a Solid body UB of RAS
Bushkova Ol'ga Viktorovna, Institute of high-temperature Electrochemistry UB of RAS

The paper presents the results of the study of phase composition and electrochemical performance of lithium-manganese oxide spinel with excess lithium of nominal composition of Li1 + xMn2O4 obtained by solid-phase method. It was established that samples with x = 0.1 and 0.2 were composite materials with LiMn2O4 being the basic phase and Li2MnO3 being the impurity (3 and 7 mas.%, respectively) also comprising trace amounts of MnO2. The composite material with 3% of Li2MnO3 (x = 0.1) retained 80–90% of the initial specific capacity after 300 charge-discharge cycles at C/2, while single-phase stoichiometric spinel LiMn2O4 retained less than 70–75%.


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