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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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Low-temperature performance and high-rate discharge capability ofAB5-type non-stoichiometric hydrogen storage alloy
LU Yan-jing(陆延静), ZHU Lei(朱 磊), CHENG Yan(成 艳),
CHEN Hui(陈 晖), JIAN Xu-yu(简旭宇), WANG Zhong(王 忠)

Energy Material and Technology Research Institute, General Research Institute for Nonferrous Metals,
Beijing 100088, China

Abstract:Low-temperature performance and high-rate discharge capability of AB5-type non-stoichiometric hydrogen storage are studied. X-ray diffraction(XRD), pressure-composition-temperature(PCT) curves and electrochemical impedance spectroscopy(EIS) are applied to characterize the electrochemical properties of ABx (x=4.8, 4.9, 5.0, 5.1, 5.2) alloys. The results show that the non-stoichiometric alloys exhibit better electrochemical properties compared with that of the AB5 alloy.

 

Key words: AB5-type hydrogen storage alloy; non-stoichiometry; low-temperature performance; high-rate discharge capability

ISSN 1672-7029
CN 43-1423/U

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