Effects of Oxidation Methods on the Stability of CoOOH Conductive Network in Foam Nickel Electrodes

Authors

Xiao-feng LI, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Yan-wei WEI, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;
Hui-chao DONG, Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;

Abstract

Two kinds of the cobalt oxyhydroxide conductive networks in foam nickel electrodes were prepared by different methods i.e.the electrochemical-oxidation(EO) and chemical-oxidation(CO) and which redox behaviors were studied by using cyclic voltammetry and X-ray diffraction measurements.The results show that the CoOOH(CO) has better redox reversibility than CoOOH(EO) and the structure of the former can be kept when nickel electrodes are subjected to a negative potential.Thus,98.7% capacity retention is demonstrated on nickel/metal-hydride batteries with CoOOH(CO) conductive network after being imposed over-discharge state storage;on the contrary,only 83.3% capacity retention is found on the batteries with CoOOH(EO) conductive network.

Keywords

nickel/metal-hydride battery, foam nickel electrode, cobalt oxyhydroxide conductive network, oxidation method

DOI Link

https://doi.org/10.61558/2993-074X.1868

Publication Date

2008-02-28

Online Available Date

2008-02-28

Revised Date

2008-02-28

Received Date

2008-02-28

Recommended Citation

Xiao-feng LI, Yan-wei WEI, Hui-chao DONG. Effects of Oxidation Methods on the Stability of CoOOH Conductive Network in Foam Nickel Electrodes[J]. Journal of Electrochemistry, 2008 , 14(1): 83-86.
DOI: 10.61558/2993-074X.1868
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss1/17