| Project/Area Number |
17H02787
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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 |
Thin film/Surface and interfacial physical properties
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| Research Institution | Kyoto University |
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Principal Investigator |
Ichii Takashi 京都大学, 工学研究科, 准教授 (30447908)
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| Co-Investigator(Kenkyū-buntansha) |
宇都宮 徹 京都大学, 工学研究科, 助教 (70734979)
橘田 晃宜 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (90586546)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2019: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2017: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Keywords | 原子間力顕微鏡 / 走査プローブ顕微鏡 / リチウムイオン電池 / イオン液体 / 電気化学 / 固液界面 |
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| Outline of Final Research Achievements |
Vacuum electrochemical atomic force microscopy (Vac-EC-AFM) is a powerful technique to investigate electrode/electrolyte interfacial structures on atomic or molecular scales. In this study, we applied this technique for spinel-type lithium titanium oxide, which is known as a promising material for negative electrode in lithium ion batteries (LIBs), and we successfully imaged LTO electrode surfaces on the atomic resolution before and after Li+ ion insertion in an ionic-liquid electrolyte. We also applied our AFM to investigate interfacial structure of superconcentrated aqueous electrolytes. In addition, we newly developed a friction-force measurement technique in liquid, which would be useful for investigate material properties on the nanometer/atomic scale.
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| Academic Significance and Societal Importance of the Research Achievements |
リチウムイオン蓄電池 (LIB) をはじめとする蓄電池技術の発展は、資源小国の我が国において極めて重要である。LIBでは、電極/電解液界面におけるリチウムイオンの脱挿入により充放電が行われる。本研究で用いた真空電気化学原子間力顕微鏡 (Vac-EC-AFM) は、充放電前後における電極構造を原子レベルで可視化できる。このような原子・分子レベルでの界面解析は、LIB開発に重要な知見を与えうると期待している。
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