| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1501172 | Scripta Materialia | 2010 | 4 Pages |
Abstract
Microstructural changes in NbF5-doped MgH2 during the dehydrogenation reaction (MgH2 → Mg + H2) have been investigated by in situ heating transmission electron microscopy. Nanocrystalline MgH2 shows fast hydrogen sorption kinetics, as well as a high density of defects induced by high-energy ball milling. Since the network-structured Nb layer covering Mg grains acts both as an impediment to grain growth of Mg and a gateway for hydrogen diffusion by forming metastable NbH1−x, the improved kinetics can be maintained during hydrogen cycling.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ji Woo Kim, Jae-Pyoung Ahn, Do Hyun Kim, Hee-Suk Chung, Jae-Hyeok Shim, Young Whan Cho, Kyu Hwan Oh,