Cyclic voltammetric studies of stabilized α-nickel hydroxide electrode

Substitution of aluminum for nickel in the lattice of nickel hydroxide, prepared by co-precipitation, leads to hydrofalcite-like compound of α-nickel hydroxide. This compound has been used as the electrochemical active material in the positive electrodes of rechargeable alkaline batteries. Cyclic voltammetric studies suggest that α-nickel hydroxide displays better reversibility of the Ni(OH)2/NiOOH redox couple. The mechanism of the electrode reaction is still found to be controlled by proton diffusion, and the proton diffusion coefficient differs with the content of aluminium.