2019 Fiscal Year Annual Research Report
Development of New Mg-Based Hydrogen Storage Materials by Binding-Energy Engineering
Project/Area Number |
16H04539
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Research Institution | Kyushu University |
Principal Investigator |
エダラテイ カベー 九州大学, カーボンニュートラル・エネルギー国際研究所, 准教授 (60709608)
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Project Period (FY) |
2016-04-01 – 2020-03-31
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Keywords | Hydrogen Storage / Metal Hydrides |
Outline of Annual Research Achievements |
Experiments using the high-pressure torsion (HPT) method and hydrogen gas absorption in combination with theoretical calculations using the first-principle and CALPHAD methods were employed to design and synthesize new hydrogen storage materials with low hydrogen binding energy that can work at room temperature. The Mg4NiPd with BCC-based structure could reversibly store hydrogen at room temperature with an excellent consistency with the theoretical binding energy calculation, but its storage capacity was bellow 1 wt.%. The experiments were further conducted to design and synthesize new Mg-based and Ti-based materials and the investigation was finally extended to high entropy hydrogen storage materials. As the first attempt, the MgTiFeVCr high-entropy alloy was synthesized, but it exhibited poor properties. The second synthesized material was TiZrCrMnFeNi, which exhibited fast and reversible hydrogen storage at room temperature with a capacity of 1.7 wt.%. This capacity is better than commercial LiN5, while TiZrCrMnFeNi is cheaper than LaNi5. Moreover, the designated material stored hydrogen without activation, while many room-temperature hydrogen storage materials such as TiFe and Ti-V-Cr need thermal activation treatment. In summary, this study showed a clear concept to design new room-temperature hydrogen storage materials by using the concept of hydrogen binding energy engineering.
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Research Progress Status |
令和元年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
令和元年度が最終年度であるため、記入しない。
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Research Products
(13 results)
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[Presentation] Design of Mg-based alloys for room temperature hydrogen storage2019
Author(s)
H.W. Li, K. Edalati, R. Uehiro, Y. Ikeda, H. Emami, Y. Filinchuk, M. Arita, X. Sauvage, I. Tanaka, E. Akiba, Z. Horita
Organizer
2019 E-MRS Fall Meeting and Exhibition, Warsaw University of Science and Technology, Warsaw, Poland
Int'l Joint Research / Invited
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