In situ transmission electron microscopy study on microstructural changes in NbF5-doped MgH2 during dehydrogenation
- In situ transmission electron microscopy study on microstructural changes in NbF5-doped MgH2 during dehydrogenation
- 김지우; 안재평; 김도현; 정희석; 심재혁; 조영환; 오규환
- Hydrogen storage; MgH2; Catalyst; NbF5; Transmission electorn miscroscopy; Ball milling; Microstructure; Hydrides
- Issue Date
- Scripta materialia
- VOL 62, NO 9, 701-704
- 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.
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