中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 3 June 2004 |
its electrodes materials①
（School of Chemical Engineering and Environment, National Development
Center of Hi-Tech Green Materials,
Beijing Institute of Technology, Beijing 100081, China）
Abstract:The results indicate that during charge and discharge, the expansion of Ni(OH)2 crystal, pulverization of MH alloy particles and falling off from current collector are identified as the main causes for deterioration of Ni/MH batteries. Meanwhile, the contact resistance of inner battery increases due to the deterioration of the negative and positive electrode, and these changes lead to increasing battery body temperature and damaging its electrode and separator. The fibre’s expansion and hole’s diminishment of battery’s separator after degradation will affect the electrochemical performance and cycle life of Ni/MH batteries.
Key words: Ni/MH battery; electrodes materials; degradation analysis; separator
