Article ID Journal Published Year Pages File Type
8000055 Journal of Alloys and Compounds 2015 24 Pages PDF
Abstract
The reversible hydrogen storage capacity and structural features against cycle numbers of SmMgNi4 compound prepared by the combination of ball-milling with sintering are investigated systematically in this work. It is found that the structure of SmMgNi4 with an exchange between Sm and Mg by 13% has a good stability without occurrence of hydrogen-induced amorphization and phase decomposition upon multiple cycling. However, about 16% capacity loss is still observed at the early stages of hydrogen ab-/desorption cycles at 298 K. The increase in lattice strain caused by the accumulation of dislocations is believed to be responsible for the capacity degradation of SmMgNi4.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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