Rezumat
Thin-layer electrolytic nickel hydroxide Ni(OH)2 have been obtained from aqueous solution of nickel sulfate and nickel nitrate. Capacitor characteristics of Ni(OH)2 have been investigated by cycling voltam- metry on dependence synthesis technology parameters, thermal treatment and storage conditions of the de- posits, КОН concentration, potential scanning rates and the relation with the parasitic process of oxygen evolution in electrochemical capacitor. It was established that КОН optimal concentration in solution of elec- trochemical capacitor equal to 0,1 M allows attain discharge capacity of the active material of 427–457 F/g. The additional anode polarization of deposited on the cathode Ni(ОН)2 stabilities the discharge characteristics of the obtained Ni(OH)2+NiO mixture at the storage processes. It was established that the mass transport process in solid state phase is the limited stage of the electrode process of Ni(ОН)2/NiOOH system in KOH environment.