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High-pressure DSC study on the hydriding and dehydriding of Mg/C nanocomposites |
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| Authors: | Eli Grigorova Maya Spassova Mitko Khristov Boyko Tsyntsarski Tony Spassov |
| Institution: | 2. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, bl.11, Acad. G. Bonchev str., 1113, Sofia, Bulgaria 1. Faculty of Chemistry and Pharmacy, University of Sofia “St. Kl. Ohridski”, 1 James Bourchier str. 1164, Sofia, Bulgaria 3. Institute of Organic Chemistry, Bulgarian Academy of Sciences, bl. 9, Acad. G. Bonchev str., 1113, Sofia, Bulgaria |
| Abstract: | High-pressure DSC was applied to study the hydriding and dehydriding behavior of Mg 95 mass%–C 5 mass% composites, synthesized by ball milling with two different kinds of carbon additives (activated carbon derived from apricot stones AS and from bean pods BP) and magnesium with different particle sizes. The composites containing finer magnesium experience absorption capacity deterioration with hydriding/dehydriding cycling, but for the Mg–AS, this worsening is in lower degree compared to Mg–BP. The activated carbon derived from the AS, used for the composites preparation, has more pronounced positive effect on the hydrogen sorption characteristics of magnesium (with both finer and coarser particles), compared with the carbon derived from BP, due to its better protection of the Mg surface from oxidation and particles agglomeration during hydriding/dehydriding cycling. |
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