Synergistic effects of Gd and Co on the phase evolution mechanism and electrochemical performances of Ce2Ni7-type La-Mg-Ni-based alloys

Zhijie Gao, Yuhong Geng, Zhen Lin, Yongxiang Wei, Yongchun Luo, Hai Wen Li

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The influences of Gd and Co co-substitution for La and Ni on phase structures, and electrochemical properties of La0.83-xGdxMg0.17Ni3.35-2xCo2xAl0.15 (x = 0-0.83) alloys were investigated. All the alloys contained A2B7-type (Ce2Ni7- and Gd2Co7-type) phase, Pr5Co19-type phase, PuNi3-type phase and CaCu5-type phase. The partial replacement of Gd and Co for La and Ni increased the phase abundance of the Ce2Ni7-type superstructure and decreased cell volumes, which contributed to a better hydrogen absorption capacity, cyclic stability and HRD. Compared to those of single Gd- or Co-substitutions, the synergistic effects of Gd and Co on the overall electrochemical properties of alloys were significant. Such a superior overall electrochemical performance may result from appropriate cell volumes and anti-pulverization abilities.

Original languageEnglish
Pages (from-to)156-163
Number of pages8
JournalDalton Transactions
Volume49
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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