Andryushin Stanislav Evgen'evich RussiaKrasnodar JSC Saturn, 21, p. 1, B. Cherkizovskaya St., Moscow, 107553инженер-технологfenwo@yandex.ru https://orcid.org/0000-0002-8617-2262 Author's articles Electrochemical Characteristics and Phase Composition of Lithium-Manganese Oxide Spinel with Excess Lithium Li_(1 + x)Mn₂O₄