Degradation Behavior of Electrochemical Performance of Sealed-Type Nickel/Metal Hydride Batteries
来源期刊：JOURNAL OF RARE EARTHS2003年第3期
论文作者：杨凯 李丽 吴锋
Key words：degradation behavior; metal hydride electrode; cycle life; rare earths;
Abstract: The degradation mechanism of electrochemical performance of sealed-type nickel/metal hydride batteries was investigated. The results indicate that the degradation behavior of Ni/MH battery is not only owing to the lack of electrolyte, but also the deterioration of the active materials on the positive and negative electrodes of Ni/MH batteries. Scanning electron micrographs (SEM), X-ray diffraction (XRD) and laser granularity analyses are presented. The particle pulverization and oxidation during charge/discharge are identified as the main causes for deterioration of the negative and positive electrode in nickel/metal hydride batteries, as well as the cross-section cracking of both anode and cathode.
杨凯1，李丽1，吴锋1
(1.School of Chemical Engineering and Environmental Science , Beijing Institute of Technology, National Development Center of Hi-Tech Green Materials, Beijing 100081, China)
Abstract:The degradation mechanism of electrochemical performance of sealed-type nickel/metal hydride batteries was investigated. The results indicate that the degradation behavior of Ni/MH battery is not only owing to the lack of electrolyte, but also the deterioration of the active materials on the positive and negative electrodes of Ni/MH batteries. Scanning electron micrographs (SEM), X-ray diffraction (XRD) and laser granularity analyses are presented. The particle pulverization and oxidation during charge/discharge are identified as the main causes for deterioration of the negative and positive electrode in nickel/metal hydride batteries, as well as the cross-section cracking of both anode and cathode.
Key words:degradation behavior; metal hydride electrode; cycle life; rare earths;
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