Study on the Contribution of Cobalt Additives to Foam Nickel Electrodes

Authors

Xiao-feng LI, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Tong-chi XIA, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Shao-peng YI, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Xiu-juan GU, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Yu-lin SONG, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;

Abstract

Two incorporation ways of the cobalt additives into foam nickel electrodes,i.e.the co-precipitated and admixed method are used.The results of X-ray diffraction(XRD),cyclic voltammetry,electrochemical impedance spectrum(EIS)and galvanostatic charge-discharge curves show that(Ⅰ)there is a decrease in intensity and increase in half peak breadths of the diffraction peaks of Ni(OH)2 with co-precipitated cobalt additive;(Ⅱ)the electrochemical activity of nickel hydroxide can be improved by both incorporation ways and the effect of admixed CoO is more notable;(Ⅲ)β-CoOOH derived from admixed CoO is not stable at lower potential,thus results in an irreversible capacity loss of nickel-metal-hydride(Ni-MH)battery after imposed overdischarged-state storage.

Keywords

nickel hydroxide electrode, cobalt additive, incorporation way

DOI Link

https://doi.org/10.61558/2993-074X.1804

Publication Date

2007-05-28

Online Available Date

2007-05-28

Revised Date

2007-05-28

Received Date

2007-05-28

Recommended Citation

Xiao-feng LI, Tong-chi XIA, Shao-peng YI, Xiu-juan GU, Yu-lin SONG. Study on the Contribution of Cobalt Additives to Foam Nickel Electrodes[J]. Journal of Electrochemistry, 2007 , 13(2): 183-187.
DOI: 10.61558/2993-074X.1804
Available at: https://jelectrochem.xmu.edu.cn/journal/vol13/iss2/14