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The effect of Zn(OH)2 addition on the electrode properties of nickel hydroxide electrodes

Published online by Cambridge University Press:  31 January 2011

J. Chen ,
D. H. Bradhurst ,
S. X. Dou  and
H. K. Liu
J. Chen
Affiliation:
Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
D. H. Bradhurst
Affiliation:
Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
S. X. Dou
Affiliation:
Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
H. K. Liu
Affiliation:
Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
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Abstract

Nickel hydroxide powders currently used in the positive electrode of nickel-metal hydride (Ni–MH) batteries require cobalt or cobalt oxides to make them viable and attractive. As a step to eliminate the cobalt-containing materials, spherical nickel hydroxide powders coprecipitated with Zn(OH)2 were prepared by a spraying technique. These powders, which have a higher tapping density and a much smaller pore volume than conventional powders, were used as the active materials of nickel hydroxide electrodes. The effects of the Zn(OH)2 additions on the electrode properties, such as percentage utilization and cycle life, were studied, and the relationship between the electrode performance and the formation of γ–NiOOH was investigated. The cycle life was increased because there was less electrode swelling due to much reduced formation of γ–NiOOH.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 1916 - 1921
Copyright
Copyright © Materials Research Society 1999

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References

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