Abstract
Double hydroxides of the formula, 
having the same structure as that of α‐nickel hydroxide have been synthesized by partial substitution of zinc for nickel. The hydroxide having the composition x = 0.25 exhibits prolonged stability in 6 M KOH. Pasted electrodes comprising this material are rechargeable with a stabilized reversible discharge capacity of 
of nickel even under suboptimal conditions of electrode fabrication. This compares favorably with the capacity values achieved for β‐nickel hydroxide (
, This work; 
, Delahaye‐Vidal and Figlarz; 
, theoretical). © 1999 The Electrochemical Society. All rights reserved.