Nickel hydroxide film electroformation in alkaline chloride solutions

M.R. GENNERO DE CHIALVO; A.C. CHIALVO

JOURNAL OF APPLIED ELECTROCHEMISTRY

SPRINGER

Lugar: Berlin; Año: 1989 vol. 19 p. 429 - 433

0021-891X

The electroformation of thick hydrous nickel hydroxide films on polycrystalline nickel electrodes in alkaline chloride solutions has been investigated. The films were obtained through the application of repetitive square-wave potential signals (RSWPS). A significant increase in the charge storage capacity of this kind of electrode with respect to those obtained by the same method in chloride-free solutions was found. It has been concluded that the halide ions do not participate directly in the metallic dissolution process which takes place at the metal-hydroxide interface, but they affect some superficial phenomena at the hydroxide-solution interface during the RSWPS treatment.