Synthesis and phase composition of the high entropy AB5 alloys (A = La, Zr; B = Ni, Mg, Al or Ga)

Authors

  • I. V. Kalytovskyi Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine
  • O. Ya. Zelinska Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine
  • A. V. Zelinskiy Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine
  • V. V. Pavlyuk Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine

Abstract

Intermetallic compound LaNi5 with hexagonal CaCu5-type structure is well known for hydrogen sorption properties because it has sufficient interatomic space (octahedral and tetrahedral voids) to incorporate hydrogen atoms. Multicomponent alloys based on it are widely used in hydrogen storage devices and nickel-metal hydride energy sources. Hydrogen storage devices and nickel-metal hydride energy sources are the most popular applications of materials based on this phase. To improve sorption and electrochemical behaviour, increase life cycle and corrosion resistance and lower the cost, it is usually doped by other rare-earth and transition metals as well as main group metals and metalloids. Here we present the results of alloying LaNi5 with zirconium, magnesium, aluminium and gallium, focusing on the synthesis and the phase composition of alloys.

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Published

2025-05-24

Issue

2025

Section

Inorganic Chemistry