Effects of Co species on the performance of pasted Ni electrode

J Mater Sci Technol ›› 2001, Vol. 17 ›› Issue (S1): 119-123.

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Effects of Co species on the performance of pasted Ni electrode

Xianxia YUAN, Yindong WANG, Feng ZHAN

Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, China...

Received:2000-04-24 Revised:2000-06-19 Online:2001-10-28 Published:2009-10-10
Contact: Xianxia YUAN

Abstract

Abstract: Effects of various Co species added by mechanically mixing with Ni(OH)(2) on the performance of Ni electrode were studied and the results were interpreted by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It was found that CoO, Co and CoO+Co all can improve the performance of Ni electrode to some extent and the effect of CoO was the most obvious. This could be attributed to several causes: all three forms of additives increased the reversibility of Ni(II)/Ni(III) redox reaction, enhanced the oxygen evolution polarization, improved the charging efficiency of Ni electrode, improved the lattice imperfection of Ni hydroxide and made it more beneficial to charge transfer and H+ diffusion processes.

Key words:

Xianxia YUAN, Yindong WANG, Feng ZHAN. Effects of Co species on the performance of pasted Ni electrode[J]. J Mater Sci Technol, 2001, 17(S1): 119-123.

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Effects of Co species on the performance of pasted Ni electrode

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