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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effects of erbium additions on high temperature performance ofhigh power Ni-MH batteries
XIE Shou-yun(谢守韫), CHENG Yan(成 艳), JIAN Xu-yu(简旭宇),
ZHU Lei(朱 磊), CHEN Hui(陈 晖), WANG Zhong(王 忠)

General Research Institute for Nonferrous Metals, Beijing 100088, China

Abstract:The Co(Ⅲ)-coated spherical nickel hydroxide powder is optimum as positive electrode of high power Ni-MH battery because of its excellent property. But the performances at high temperature (above 50 ℃) is still not satisfied. In the present paper, the effect of element erbium, used as additive by different methods to prepare positive electrode, on the high temperature performances of the Ni-MH batteries is studied. It is found that the charge acceptance ability of the spherical Ni(OH)2 electrode with element erbium as additive is improved. The discharge capacities of Ni(OH)2 coated with 1% (atomic fraction) Er(OH)3 and mechanically added with 1% (atomic fraction) Er2O3 at 1C are 12.6% and 11.7%, respectively, higher than those of the samples without erbium at 70 ℃.

 

Key words: Ni-MH battery; nickel hydroxide electrode; Er-coating; high temperature performance

ISSN 1672-7029
CN 43-1423/U

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