Effects of nano-molybdenum coatings on the hydrogen storage properties of La–Mg–Ni based alloys

Huaiwei Zhang, Liang Bao, Jianbo Qi, Weidong Xuan, Li Fu and Yongjun Yuan

Renewable Energy, 2020, vol. 157, issue C, 1053-1060

Abstract: A relatively simple, but very effective method via magnetron sputtering process was used in the surface doping of the electrode plates. Molybdenum nano-particles coated electrodes were studied in the paper. The flower-like deposits appeared on the electrode plate surface, and Ni4Mo could be in-situ formed with the coating process. The hydrogen ab/desorption rates were accelerated at the beginning and dropped subsequently. The max discharge capacity and retention rate after twenty cycles of the St 5min sample reached about 370mAh/g and 92%, respectively. Comparing to the typical hydrogen storage alloys, they were much closed to the A2B7-type and have surpassed the most AB3-type Co-containing alloys. The activation energies and enthalpies of the various electrodes during the ab/dehydrogenation process were also discussed in details.

Keywords: Hydrogen storage; Surface modification; Electrode; Magnetron sputtering (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:157:y:2020:i:c:p:1053-1060

DOI: 10.1016/j.renene.2020.05.078

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