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Stability, Electronic Structure and Thermodynamic Properties of Nanostructured MgH 2 Thin Films

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  • Omar Mounkachi

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco
    Modeling, Simulation & Data Analysis Program, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco)

  • Asmae Akrouchi

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco)

  • Ghassane Tiouitchi

    (Modeling, Simulation & Data Analysis Program, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco)

  • Marwan Lakhal

    (Ecole Supérieure de Technologie de Laâyoune, Ibn Zohr University, Laayoune BP 3007, Morocco)

  • Elmehdi Salmani

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco)

  • Abdelilah Benyoussef

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco
    Hassan II Academy of Sciences and Techniques, Mohammed V University, Rabat BP 1014, Morocco)

  • Abdelkader Kara

    (Department of Physics, University of Central Florida, Orlando, FL 32816, USA)

  • Abdellah El Kenz

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco)

  • Hamid Ez-Zahraouy

    (Laboratory of Condensed Matter and Sciences Interdisciplinary, Faculty of Science, Mohammed V University, Rabat BP 1014, Morocco)

  • Amine El Moutaouakil

    (Department of Electrical and Communication Engineering, College of Engineering, United Arab University, Abu Dhabi, P.O. Box 15551, Al Ain 15551, United Arab Emirates)

Abstract

Magnesium is an attractive hydrogen storage candidate due to its high gravimetric and volumetric storage capacities (7.6 wt.% and 110 gH 2 /l, respectively). Unfortunately, its use as a storage material for hydrogen is hampered by the high stability of its hydride, its high dissociation temperature of 573–673 K and its slow reaction kinetics. In order to overcome those drawbacks, an important advancement toward controlling the enthalpy and desorption temperatures of nano-structured MgH 2 thin films via stress/strain and size effects is presented in this paper, as the effect of the nano-structuring of the bulk added to a biaxial strain on the hydrogen storage properties has not been previously investigated. Our results show that the formation heat and decomposition temperature correlate with the thin film’s thickness and strain/stress effects. The instability created by decreasing the thickness of MgH 2 thin films combined with the stress/strain effects induce a significant enhancement in the hydrogen storage properties of MgH 2 .

Suggested Citation

  • Omar Mounkachi & Asmae Akrouchi & Ghassane Tiouitchi & Marwan Lakhal & Elmehdi Salmani & Abdelilah Benyoussef & Abdelkader Kara & Abdellah El Kenz & Hamid Ez-Zahraouy & Amine El Moutaouakil, 2021. "Stability, Electronic Structure and Thermodynamic Properties of Nanostructured MgH 2 Thin Films," Energies, MDPI, vol. 14(22), pages 1-10, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7737-:d:682029
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    References listed on IDEAS

    as
    1. Sadhasivam, T. & Kim, Hee-Tak & Jung, Seunghun & Roh, Sung-Hee & Park, Jeong-Hun & Jung, Ho-Young, 2017. "Dimensional effects of nanostructured Mg/MgH2 for hydrogen storage applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 72(C), pages 523-534.
    2. Omnia Samy & Amine El Moutaouakil, 2021. "A Review on MoS 2 Energy Applications: Recent Developments and Challenges," Energies, MDPI, vol. 14(15), pages 1-20, July.
    3. Louis Schlapbach & Andreas Züttel, 2001. "Hydrogen-storage materials for mobile applications," Nature, Nature, vol. 414(6861), pages 353-358, November.
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    Cited by:

    1. Liu, Yongfeng & Zhang, Wenxuan & Zhang, Xin & Yang, Limei & Huang, Zhenguo & Fang, Fang & Sun, Wenping & Gao, Mingxia & Pan, Hongge, 2023. "Nanostructured light metal hydride: Fabrication strategies and hydrogen storage performance," Renewable and Sustainable Energy Reviews, Elsevier, vol. 184(C).

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