FIELD: electrical engineering. SUBSTANCE: electrode has composite lithium base oxide as active material meeting 1.5≤Sa/Sc≤10 relation, where Sa is specific surface area measured by BET method; r is particle diameter; f(r) is particle distribution; d is particle density of mentioned composite lithium base oxide; Sc is quantity found from formula 
. EFFECT: improved capacity and discharge characteristics. 3 cl, 2 dwg, 2 tbl, 3 ex
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