Journal of Inorganic Materials, Volume. 35, Issue 5, 549(2020)

Microstructure and Electrochemical Property of A2B7-type La0.3Y0.7Ni3.4-xMnxAl0.1 Hydrogen Storage Alloys

Kun ZHENG1... Yongchun LUO1,2,*, Anqiang DENG1, Yang YANG1 and Haiming ZHANG1 |Show fewer author(s)
Author Affiliations
  • 1Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • 2State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
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    Figures & Tables(15)
    SEM images of the annealed alloys (a-e) and EDS pattern of A2B7-type phase in area 3
    XRD patterns (a) and local enlarge XRD patterns (b) of the annealed alloys (a, b) and Rietveld refinement XRD profile of the sample x=0.15(c)
    Phase structure and phase abundances of the annealed alloys
    Lattice parameters (a, c), c/a ratio and (insert)cell volume, V of Ce2Ni7 type phase for the annealed alloys
    PCT curves and (insert) the relationships between plateau pressure, cell volume and Mn content of the alloys at 300 K
    lnPeq -1/T plots of the annealed alloys
    Activation and (insert) discharge potential curves of the alloy electrodes
    Electrochemical cycling curves and (insert) the relationshipsbetween S100, discharge capacity and Mn content of the alloy electrodes
    XRD patterns of the alloy electrodes after 100 electrochemical cycles
    SEM images of the alloy electrodes after 100 electrochemical cycles
    Total XPS spectrum (a) and high resolution La3d(b) and Y3d(c) XPS spectra of the alloy electrodes after 100 electrochemical cycles
    Tafel polarization curves and (insert) the relationshipsbetween Ecorr, Icorr and Mn content of the alloy electrodes
    High rate discharge ability of the alloy electrodes
    Relationships between I0, D0 and Mn content x
    • Table 1. Elements content of the annealed alloys by ICP analysis

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      Table 1. Elements content of the annealed alloys by ICP analysis

      AlloyElement/wt%StoichiometricB/A ratio
      LaYNiMnAl
      x=06.7315.3375.750.002.193.53
      x=0.156.8215.5672.382.902.343.47
      x=0.26.8615.4771.573.862.243.48
      x=0.36.9115.7168.616.412.373.42
      x=0.56.9415.7765.0210.112.173.40
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    Kun ZHENG, Yongchun LUO, Anqiang DENG, Yang YANG, Haiming ZHANG. Microstructure and Electrochemical Property of A2B7-type La0.3Y0.7Ni3.4-xMnxAl0.1 Hydrogen Storage Alloys[J]. Journal of Inorganic Materials, 2020, 35(5): 549

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    Paper Information

    Category: RESEARCH PAPER

    Received: Apr. 30, 2019

    Accepted: --

    Published Online: Mar. 1, 2021

    The Author Email: LUO Yongchun (luoyc@lut.edu.cn)

    DOI:10.15541/jim20190190

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