Ingot electrodes have been made of blocks of LaNi4.3–xCoxMn0.4Al0.3 (x = 0 ÷ 1) materials which were fabricated in an arc melting furnace and following by annealing at 1100 °C in argon atmosphere during 7 days. Surface and performance capacities of the ingot electrodes have been determined using cyclic voltammetry (CV), potentiostatic (PS) and galvanostatic (GS) techniques. Basing on the experimental data, the thicknesses of active layer (λa) and of performance layer (dp) on the electrodes have been calculated. Thickness of layers depend on Co ratio in the alloys. With x Co ratio in the range from 0.5 to 0.75, the highest surface capacity, λa = 0.4 nm, has been considered, corresponding to two atomic layers. The performance thickness of ingot electrodes in the range from 0.8 to 1.5 μm, the highest about 2 μm was found in sample with x = 0.75.