Preparation and electrode properties of new ternary alloys: REMgNi 4 (RE = La, Ce, Pr, Nd)

Z. M. Wang, H. Y. Zhou, G. Cheng, Z. F. Gu, A. B. Yu

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Abstract

According to the elemental ratio of Nd:Mg:Ni = 1:1:4, NdMgNi4 ternary alloy was synthesized by sintering pressed tablets of the powders milled for 6 h. The sintering conditions are: 673 K, 3 h → 873 K, 3 h → 973 K, 3 h. The XRD analysis shows that the REMgNi4 (RE = La, Ce, Pr, Nd) alloys are single component alloys, and that Mg2Ni exists during the process of formation of the alloys. The electrode properties of the REMgNi 4 alloys were measured by simulated battery test. It was found that the initial discharge capacity of Mg2Ni and LaMgNi4 alloys milled for 50 h is about 400 mAh/g, but a good cycle life has been observed for the electrode of milled LaMgNi4 alloy. As to REMgNi4 alloys, a slightly increasing discharge capacity was observed in the following order: LaMgNi4 > NdMgNi4 > CeMgNi4 > PrMgNi4.

Original languageEnglish
Pages (from-to)279-282
Number of pages4
JournalJournal of Alloys and Compounds
Volume384
Issue number1-2
DOIs
Publication statusPublished - 14 Dec 2004
Externally publishedYes

Keywords

  • NdMgNi
  • REMgNi
  • Sintering

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