2015 Fiscal Year Annual Research Report
リチウム系水素貯蔵物質の水素吸蔵放出速度とリチウムイオン電導度に関する研究
| Project/Area Number |
15J00752
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| Research Institution | Hokkaido University |
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Principal Investigator |
張 騰飛 北海道大学, 工学研究院, 特別研究員(PD)
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| Project Period (FY) |
2015-04-24 – 2017-03-31
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| Keywords | energy storage / lithium metatitanate / hydride / hydrogen storage / catalyst / desorption property / solid state reaction / DFT calculation |
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| Outline of Annual Research Achievements |
I clarified the de/hydrogenation properties in the Lithium-X-Hydrogen system with catalyst. Catalytic effect for notable complex/metal hydrides, LiAlH4, and LiNH2/LiH along MgH2 is investigated. Lithium metatitanate (Li2TiO3) is introduced for such systems. Experiment indicates that Li2TiO3 is proven to improve the kinetics of those hydrides. In particular, Li2TiO3 dramatically improve the onset temperature of LiAlH4 to 75°C, which is within the temperature range of using proton exchange membrane fuel cell. The first principle calculation also show the improvement of H- and Li+ mobility by Li2TiO3 where calculations reveals that the physical origin of the catalytic effect rests on two factors; charge transfer and minor surface relaxation. Thus, the experiment and theoretical evidence reveals the catalytic effect mechanism of Li2TiO3 in complex metal hydrides.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The experiment and theoretical evidence reveals the catalytic effect mechanism of Li2TiO3 in complex metal hydrides. Two related paper has been submitted to international journal.
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| Strategy for Future Research Activity |
Based on the experiments in the first year, I plan to start the lithium ionic conductivity among each sample. Ac impedance machine is the main equipment for these experiments. After analyzing and comparing the results between dehydrogenation properties and lithium ionic conductivity, the best system could be chosen. According to the results, manuscript will be prepare to submit in the international journal.
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