Shchekoldin Sergei Ivanovich RussiaKrasnodar JSC Saturn, 21, p. 1, B. Cherkizovskaya St., Moscow, 107553начальник лабораториикандидат технических наукsishch7@rambler.ru https://orcid.org/0000-0001-8801-683X Author's articles Electrochemical Characteristics and Phase Composition of Lithium-Manganese Oxide Spinel with Excess Lithium Li_(1 + x)Mn₂O₄