For citation:
Koshkina A. A., Yaroslavtseva T. V., Urusova N. V., Reznizkikh O. G., Khrustalev M. A., Nefedova K. V., Zhuravlev V. D., Bushkova O. V. Lithium borates as a surface protective layer for lithium-manganese spinel. Electrochemical Energetics, 2024, vol. 24, iss. 2, pp. 88-102. DOI: 10.18500/1608-4039-2024-24-2-88-102, EDN: BXJTPZ
Lithium borates as a surface protective layer for lithium-manganese spinel
The protective properties of the coating applied to the surface of lithium-manganese spinel (LiMn2O4), using the eutectic composition of Li2O : B2O3 = 47 : 53 (wt.) with the melting point of 650°C, were studied. The content of the eutectic lithium borate varied from 1% to 10%. The electrochemical behavior of the obtained materials in the cathode half-cells of lithium-ion battery was studied at room temperature. It was shown that an abnormally large decrease in the specific capacity of lithium-manganese spinel took place simultaneously with the stabilizing effect. The side chemical reactions that occur between LiMn2O4 and the eutectic lithium borate during annealing while applying a protective layer were analyzed. The chemical stability of lithium-manganese spinel (LiMn2O4) and the manganese-containing solid solution with the layered structure, LiNi1/3Mn1/3Co1/3O2, with respect to enriched lithium borates, was compared.
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