Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1626781 | Journal of Alloys and Compounds | 2006 | 4 Pages |
Abstract
The electrochemical characterization of a MmNi3.55Co0.75Al0.2Mn0.5 metal hydride electrode in two alkaline electrolytes (NaOH or KOH) is reported. The results from both electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) show that absorption/desorption of H atoms at the metal–electrolyte interface is markedly suppressed by using a NaOH electrolyte instead of a KOH electrolyte. This results in a significant reduction of the self-decomposition rate of the negative active material and thus leads to an improvement in the self-discharge performance of nickel–metal hydride (Ni–MH) batteries.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Xiaofeng Li, Huichao Dong, Aiqin Zhang, Yanwei Wei,