Modified Nickel Hydroxide Electrodes

Abstract

Inclusion of Co metal as an additive during the preparation of pasted electrodes enhances the reversible discharge capacity of β-nickel hydroxide from 220 mAh g−1 of Ni to 400 mAh g−1 (theoretical, 456 mAh g−1 Ni). In contrast, the performance of (bc badly crystalline) and α-nickel hydroxide is relatively unaffected by addition of Co. In electrodes comprising the crystalline-layered double hydroxide of Ni with Al, Co addition not only results in enhancement of the capacity from 375 to 585 mAh g−1 but also increases capacity retention. © 2002 The Electrochemical Society. All rights reserved.