| Project/Area Number |
18H05939
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Review Section |
0401:Materials engineering, chemical engineering, and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
韓 久慧 東北大学, 材料科学高等研究所, 助手 (40823092)
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| Project Period (FY) |
2018-08-24 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 液体セル透過電子顕微鏡 / リチウム空気電池 / その場観察 / 透過電子顕微鏡 / Li-O2電気化学 / 液体セル |
|---|
| Outline of Annual Research Achievements |
Using in situ liquid cell transmission electron microscopy, we have successfully investigated the reaction dynamics of Li-O2 battery in real-time and real-space. The nanoscale reactions at the electrode-electrolyte interfaces, associated with the formation and decomposition of solid Li2O2 phase, were directly visualized. We found that discharge and charge rate can significantly affect the fundamental mechanisms of Li-O2 reactions. At low rates, the Li-O2 reaction proceeds via a solution mechanism with the formation of Li2O2 layers as thick as ~500 nm. While under high overpotential conditions, a very thin Li2O2 layer forms through a surface mechanism with fast passivation of the electrode surfaces. These findings have advanced our understandings of the fundamental Li-O2 electrochemistry.
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| Research Progress Status |
平成30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 |
平成30年度が最終年度であるため、記入しない。
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