The paper of Prof. Etsuo Akiba, Assoc. Prof. Hai-Wen Li, Assist. Prof. Junko Matsuda and Assist. Prof. Huaiyu Shao (Hydrogen Storage Research Division, I2CNER) was published in “International Journal of Hydrogen Energy” and their paper was highlighted by International Association for Hydrogen Energy(IAHE). These Mg-based alloys with special structure can absorb hydrogen at 258 K, which is the lowest temperature reported so far for Mg-based hydrogen storage materials to the best of our knowledge.

■Summary

Ball milled Mg–Co alloys with body-centered cubic structure (BCC) may absorb hydrogen at 258 K with a hydrogen capacity around 3 mass%. The phase and morphology evolution process of Mg₅₀Co₅₀ alloys ball milled for 0.5 h–400 h was studied by X-ray diffraction and scanning electron microscope. The formation mechanism of the Mg₅₀Co₅₀ alloys was clarified. Mg₅₀Co₅₀ alloys ball milled for various durations were found to present different hydrogen storage properties which could result from the phase and morphology difference in these samples.

■Paper

Title: Phase and morphology evolution study of ball milled Mg-Co hydrogen storage alloys

Authors: Huaiyu Shao, Junko Matsuda, Hai-Wen Li, Etsuo Akiba, Ankur Jain, Takayuki Ichikawa, Yoshitsugu Kojima

DOI: 10.1016/j.ijhydene.2013.04.026.

Publication Date (Web): 1 May, 2013