The Mg/MAX-phase composite for hydrogen storage

• Published in: International journal of hydrogen energy Vol. 47; no. 11; pp. 7274 - 7280
• Main Authors: Lakhnik, A.M., Kirian, I.M., Rud, A.D.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 05-02-2022
• Subjects: Hydrogen storage; MAX-phase; Mg/MAX-phase composite; Reactive ball milling; Reactive ball milling; MAX-phase; Hydrogen storage; Mg/MAX-phase composite
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2021.02.081

The Mg/MAX-phase composite materials are synthesized by reactive ball milling (RBM) in a hydrogen gas atmosphere, and phase composition and dehydrogenation performance of the composites are investigated. The Ti3AlC2 MAX-phase markedly reduces the dehydrogenation temperature of the MgH2 to 246 °C for the sample with 5 wt% of Ti3AlC2 MAX-phase and to 236 °C for the sample with 7 %wt. of Ti3AlC2 MAX-phase. The highest hydrogen capacity of 5.6 wt% was achieved for the Mg+7 wt% MAX-phase composite. The kinetic mechanism of the dehydrogenation of the composites is investigated by the Johnson-Mehl-Avrami-Kolmogorov (JMAK) technique.
•Mg-based composites for hydrogen storage are synthesized by reactive ball milling.•Mg/MAX-phase composites exhibit good hydrogen performances.•MAX-phase remarkably affects on desorption behavior of MgH2.