2015 Fiscal Year Final Research Report
Vacancy formation and recovery phenomena during hydrogenation and dehydrogenation in La(Ni,Cu)5+x
| Project/Area Number |
25820361
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
SAKAKI Kouji 国立研究開発法人産業技術総合研究所, 創エネルギー研究部門, 主任研究員 (20392615)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 水素吸蔵 / 相変態 / 空孔 |
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| Outline of Final Research Achievements |
The vacancy formation and recovery phenomena during hydrogenation and dehydrogenation in La(Ni,Cu)5+x were investigated. The positron lifetime increased upon hydrogenation and dehydrogenation in all samples which we synthesized. However, its increment was suppressed with increasing of the deviation from the stoichiometry. X-ray diffraction results showed that the lattice misfit decreased and concentration of dumbbell pairs increased with increasing of the deviation from the stoichiometry. Therefore, it suggests that the vacancy formation was suppressed by smaller lattice misfit and/or the vacancy recovery was enhanced by increase of concentration of dumbbell pairs.
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| Free Research Field |
水素吸蔵材料
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