Studies on co-free rare-earth-based hydrogen storage alloys

Studies on co-free rare-earth-based hydrogen storage alloys

A series of multi-component, Co-free Mm-based alloys were prepared. The effect of partial substitution of alloy components on the electrochemical properties was investigated. The results show that the electrochemical cycling stability is greatly improved by slightly raising the Al content in alloys...

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Veröffentlicht in:Journal of alloys and compounds 1998-05, Vol.269 (1), p.254-258
Hauptverfasser: Hu, Wei-Kang, Kim, Dong-Myung, Jang, Kuk-Jin, Lee, Jai-Young
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Chemical and electrochemical properties
Co-free mischmetal-based alloys
Electrochemical properties
Exact sciences and technology
Hydrogen storage alloys
Metal hydrogen electrode
Metals. Metallurgy
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container_end_page 258
container_issue 1
container_start_page 254
container_title Journal of alloys and compounds
container_volume 269
creator Hu, Wei-Kang
Kim, Dong-Myung
Jang, Kuk-Jin
Lee, Jai-Young
description A series of multi-component, Co-free Mm-based alloys were prepared. The effect of partial substitution of alloy components on the electrochemical properties was investigated. The results show that the electrochemical cycling stability is greatly improved by slightly raising the Al content in alloys and adding a small amount of Si and Cu. A satisfactory cycling stability is obtained with an alloy composition of MmNi 3.60Mn 0.36Al 0.54Cu 0.4Si 0.1. The replacement of Mm by a small amount of Ti or Zr is useful in improving the durability of alloys, but the rate capability decreases. The reason is discussed and explained by the EIS technique and consideration of the polarization resistance of electrodes.
doi_str_mv 10.1016/S0925-8388(97)00602-6
format Article
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The effect of partial substitution of alloy components on the electrochemical properties was investigated. The results show that the electrochemical cycling stability is greatly improved by slightly raising the Al content in alloys and adding a small amount of Si and Cu. A satisfactory cycling stability is obtained with an alloy composition of MmNi 3.60Mn 0.36Al 0.54Cu 0.4Si 0.1. The replacement of Mm by a small amount of Ti or Zr is useful in improving the durability of alloys, but the rate capability decreases. 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subjects Applied sciences
Chemical and electrochemical properties
Co-free mischmetal-based alloys
Electrochemical properties
Exact sciences and technology
Hydrogen storage alloys
Metal hydrogen electrode
Metals. Metallurgy
title Studies on co-free rare-earth-based hydrogen storage alloys
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