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Electrochemical hydrogenation of Mg76Li12Al12 solid solution phase

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Abstract

The electrochemical hydrogenation of Mg-based solid solution phase with Mg76Li12Al12 composition was studied by various electrochemical methods. The Mg76Li12Al12Hx (0 < x < 74) hydride has a hexagonal crystal structure (P-6m2, a = 3.1485(1), c = 5.1111(2) Å) in which the hydrogen atoms insert to octahedral voids. The reversible hydrogen storage capacity of these compounds reached 3.2 wt% H, corresponding to 865 mAh/g. After final charging/discharging cycles, the initial Mg76Li12Al12 solid solution phase was recovered, indicating that the electrochemical reactions are reversible. These observations are confirmed by X-ray powder diffraction (XRPD) method and scanning electron microscopy (SEM).

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Funding

Financial support from the National Science Centre, Poland (no. 2017/25/B/ST8/02179) is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Chemistry, Environmental Protection and Biotechnology, Częstochowa Jan Długosz University, Al. Armii Krajowej 13/15, 42-200, Częstochowa, Poland

    Volodymyr Pavlyuk, Nazar Pavlyuk & Vasyl Kordan

  2. Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla i Mefodia 6, Lviv, 79005, Ukraine

    Volodymyr Pavlyuk, Wojciech Ciesielski, Damian Kulawik, Malgorzata Szyrej & Beata Rozdzynska-Kielbik

Authors
  1. Volodymyr Pavlyuk
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  2. Wojciech Ciesielski
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  3. Nazar Pavlyuk
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  4. Damian Kulawik
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  5. Malgorzata Szyrej
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  6. Beata Rozdzynska-Kielbik
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Correspondence to Volodymyr Pavlyuk.

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Pavlyuk, V., Ciesielski, W., Pavlyuk, N. et al. Electrochemical hydrogenation of Mg76Li12Al12 solid solution phase. Ionics 25, 2701–2709 (2019). https://doi.org/10.1007/s11581-018-2743-8

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  • DOI: https://doi.org/10.1007/s11581-018-2743-8

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