FIELD: electrode technology. SUBSTANCE: component, which can be added to nickel electrode, is prepared by subjecting cobalt oxides or their precursors to heat treatment at 500-850 C in presence of reducing agent. Treatment is carried out in rotary tube kiln or in fluidized-bed reactor. EFFECT: increased degree of utilization of cobalt in electrochemical processes involved in charging and discharging of batteries. 10 cl, 1 tbl, 14 ex
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