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The Influence of Cerium on the Hydrogen Storage Properties of La 1-x Ce x Ni 5 Alloys

Author

Listed:
  • Magda Pęska

    (Department of Functional Materials and Hydrogen Technology, Military University of Technology, 00-908 Warsaw, Poland)

  • Julita Dworecka-Wójcik

    (Department of Functional Materials and Hydrogen Technology, Military University of Technology, 00-908 Warsaw, Poland)

  • Tomasz Płociński

    (Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland)

  • Marek Polański

    (Department of Functional Materials and Hydrogen Technology, Military University of Technology, 00-908 Warsaw, Poland)

Abstract

La 1-x Ce x Ni 5 alloys (x = 0, 0.09, 0.25 and 0.5) were investigated in terms of their structures, phase contents, hydrogen storage properties and microhardness. It was confirmed that a cerium addition to the reference (LaNi 5 ) alloy caused structural changes such as lattice shrinkage and, as a result, changed both the absorption and desorption pressures and the enthalpies of formation and decomposition. The alloy with the highest cerium content was found to possess a two-phase structure, probably as a result of nonequilibrium cooling conditions during its manufacturing process. The microhardness was found to increase to some extent with the cerium content and decrease for samples with the highest cerium content.

Suggested Citation

  • Magda Pęska & Julita Dworecka-Wójcik & Tomasz Płociński & Marek Polański, 2020. "The Influence of Cerium on the Hydrogen Storage Properties of La 1-x Ce x Ni 5 Alloys," Energies, MDPI, vol. 13(6), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1437-:d:334592
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