Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 12    December 2013

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Effect of Nd content on electrochemical performances of nanocrystalline and amorphous (Mg24Ni10Cu2)100-xNdx (x=0-20) alloys prepared by melt spinning
Yang-huan ZHANG1,2, Tai YANG2, Wen-gang BU1,2, Ying CAI1, Guo-fang ZHANG1, Dong-liang ZHAO2

1. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources,
Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China

Abstract:The nanocrystalline and amorphous Mg2Ni-type alloys with a chemical composition of (Mg24Ni10Cu2)100-xNdx (x=0, 5, 10, 15, 20) were fabricated by melt spinning technology. The effects of spinning rate on the structure and electrochemical hydrogen storage performance of the alloys were investigated. The as-spun Nd-free alloy displays an entire nanocrystalline structure, whereas the as-spun Nd-added alloys hold a nanocrystalline and amorphous structure, suggesting that the addition of Nd facilitates the glass forming of the Mg2Ni-type alloys. Increasing the spinning rate from 0 to 40 m/s gives rise to the discharge capacity growing from 42.5 to 100.6 mA·h/g for the x=0 alloy and from 86.4 to 452.8 mA·h/g for the x=10 alloy. And the cycle stability (S20) rises from 40.2% to 41.1% for the x=0 alloy and from 53.2% to 89.7% for the x=10 alloy, respectively.

 

Key words: hydrogen storage; alloy; Mg2Ni-type alloy; Nd; melt spinning; structure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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