The influence of the pre-electrolysis of the electrolyte and the alkaline cation nature on the self-discharge and discharge effeciency of nickel hydroxide electrodes chemically precipatated on different substrates

M. V. VÁZQUEZ; R. E. CARBONIO; V. A. MACAGNO

ELECTROCHEMICAL SOC INC

Año: 1991 vol. 138 p. 1874 - 1874

p style="TEXT-ALIGN: justify; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt; TEXT-AUTOSPACE: ; mso-layout-grid-align: none" class="MsoNormal">The self-discharge rates and discharge efficiency of thin nickel hydroxide films prepared by chemical precipitation on Pt and Ni substrates are determined in different electrolytes. Self-discharge rates are relatively high in non-pre-electrolyzed solutions due to the presence of iron impurities. These rates are lower in pre-electrolyzed solutions because iron impurities are partially eliminated by cathodic deposition. The discharge efficiency depends largely on the electrolyte nature, decreasing in the order KOH > NaOH > LiOH.