2019 Fiscal Year Final Research Report
Development of New Mg-Based Hydrogen Storage Materials by Binding-Energy Engineering
| Project/Area Number |
16H04539
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
Edalati Kaveh 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 / High-Pressure Torsion |
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| Outline of Final Research Achievements |
First-principle calculations and CALPHAD methods were combined with experiments to design new hydrogen storage materials with low hydrogen binding energy that can store hydrogen at room temperature. The high-pressure torsion method was used to synthesize the designated materials, resulted in discovery of various Mg-, Ti- and high-entropy-based hydrogen storage materials. Among these materials, Mg4NiPd was one good example which reversibly stored 0.8 wt% hydrogen at room temperature, in agreement with binding energy calculations. The second example was TiZrCrMnFeNi, which showed fast and reversible hydrogen storage at room temperature with 1.7 wt% capacity (30% higher than capacity of commercial rare-earth-based LaNi5). Rare-earth-free TiZrCrMnFeNi stored hydrogen without activation, but many hydrogen storage alloys need an extra activation process. This study showed a clear method to design new room-temperature hydrogen storage materials using the concept of binding energy engineering.
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| Free Research Field |
Materials Physics and Chemistery
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| Academic Significance and Societal Importance of the Research Achievements |
A theoretical/experimental method is reported to design and synthesize new solid materials that can store hydrogen at room temperature. Such materials can potentially be used not only for compact and safe storage of hydrogen in stationary applications but also for energy storage in Ni-MH batteries.
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