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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 2    June 1998

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ELECTRODE CHARACTERISTICS OF NANOCRYSTALLINE LaNi5PREPARED BY MECHANICAL ALLOYING
Chen Zhenhua1 Chen Zhaohui1 Zhou Duosan1 and Huang Peiyun1  Lü Manqi2 and Wang Yulan2

1.Institute ofNon-equilibrium Materials Science and Engineering Central South University of Technology, Changsha 410083, P.R. China;
2.State Key Lab for RSA, Institute of Metal Research,Chinese Academy of Sciences, Shenyang110015, P. R. China

Abstract:The potential application of nanocrystalline LaNi5 as rechargeable battery negative electrode material was investigated. Nanocrystalline LaNi5 was synthesized by ball milling a mixture of La and Ni elemental powders. The TEM morphology of this nanocrystalline LaNi5 powder showed that it had an average grain size of 50 nm. It was found that electrode prepared with nanocrystalline LaNi5had a comparable discharge capacity, in comparison with the negative electrode prepared with polycrystalline coarse grained LaNi5, and had easier activation behavior and longer cycling lifetime. These novel properties were attributed to the special structure of nanocrystalline LaNi5 caused by mechanical alloying.

 

Key words: nanocrystalline nickel-metal hydride battery mechanical alloying electrode characteristics

ISSN 1672-7029
CN 43-1423/U

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