Optimization of LaNi5 hydrogen storage properties by the combination of mechanical alloying and element substitution - Archive ouverte HAL
Article Dans Une Revue International Journal of Hydrogen Energy Année : 2024

Optimization of LaNi5 hydrogen storage properties by the combination of mechanical alloying and element substitution

Résumé

LaNi5 is a commercial hydrogen storage alloy with great potential. But its performance still needs to be optimized to meet the standard proposed by the US Department of Energy. Element substitution is a very important method to optimize the performance of hydrogen storage alloys, especially suitable for AB5 alloys. As a novel method to produce nanocrystalline hydrogen storage alloys, mechanical alloying is also often applied to optimize the properties of hydrogen storage alloys. In this work, first of all, the simulation method based on first principles is applied to predict the performance of 8 elements substituting Ni respectively, and select the most suitable element to substitute Ni. Then the phase composition characterization, hydrogen storage performance tests and electrochemical performance tests were carried out. It was found that mechanical alloying can greatly improve the hydrogen storage performance of LaNi5, and different ball milling times can bring about different performance changes. After adding Cr to the ballmilled LaNi5, the properties of the formed LaNi4Cr were further improved.
Fichier principal
Vignette du fichier
c10b99c2-bafd-4af6-bf09-c440b0faa8a0-author.pdf (535.89 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04724953 , version 1 (07-10-2024)

Identifiants

Citer

Yuchen Liu, Djafar Chabane, Omar El Kedim. Optimization of LaNi5 hydrogen storage properties by the combination of mechanical alloying and element substitution. International Journal of Hydrogen Energy, 2024, 53, pp.394 - 402. ⟨10.1016/j.ijhydene.2023.12.038⟩. ⟨hal-04724953⟩
19 Consultations
13 Téléchargements

Altmetric

Partager

More