Cyclic voltammetric studies of stabilized alpha-nickel hydroxide electrode

Substitution of aluminum for nickel in the lattice of nickel hydroxide, pre pared by co-precipitation, leads to hydrofalcite-like compound of of-nickel hydroxide. This compound has been used as the electrochemical active mater ial in the positive electrodes of rechargeable alkaline batteries. Cyclic v oltammetric studies suggest that or-nickel hydroxide displays better revers ibility 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 prot on diffusion coefficient differs with the content of aluminium. (C) 1999 El sevier Science S.A. All rights reserved.