Abstract
Two simple and efficient surface treatment methods for AB_5type hydrogen storage alloys were developed. The results of X-ray photoelectron spectroscopy (XPS) and cyclic voltammetric (CV) experiments showed that the hydrogen storage alloys treated by two different methods had Nirich surface layer so that the performances of the electrodes were improved after treatment. The characterization of the oxide films which formed on the surface of electrodes through potentiodynamic oxidation with the help of photoelectrochemical microscopy (PEM) were done. The anodic photocurrent and the cathodic photocurrent related to the oxidation of hydrogen and the reduction of oxygen on the surface layer were observed in different potential regions respectively. Furthermore, it was found that the capability of oxidationresist of alloy depends on the surface treatment procedure, and it was shown that the capability of oxidationresist of alloy treated by the 1st method was better than the second. Finally, it was demonstrated that the discharge performance of the electrode treated by the 1st method was greatly improved.
Publication Date
1998-02-28
Online Available Date
1998-02-28
Revised Date
1998-02-28
Received Date
1998-02-28
Recommended Citation
Junmin Nan, Yong Yang, Jun Li, Zugeng Lin.
The Investigations of Surface Treatment Methods and Characterization of Oxide Films on AB_5based Metal Hydride Electrodes Ⅰ. New Nirich treatment methods and photoelectrochemical characterization of oxide films[J]. Journal of Electrochemistry,
1998
,
4(1): Article 14.
DOI: 10.61558/2993-074X.2679
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol4/iss1/14
Included in
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