Development of in situ electrochemical high resolution TEM system using ionic liquid

• Project/Area Number: 15K13287
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials chemistry
• Research Institution: Osaka University
• Principal Investigator: Kuwabata Susumu 大阪大学, 工学研究科, 教授 (40186565)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 電子顕微鏡 / その場観察 / イオン液体 / in situ 電子顕微鏡観察 / リチウムイオン電池 / シリコン負極材料 / その場計測 / 透過型電子顕微鏡

Outline of Final Research Achievements

Development of the system which enables TEM observation of electrochemical reaction in real time is purpose of this project. The key technology for this purpose is use of ionic liquid which is not vaporized under vacuum condition because of its extremely low vapor pressure. The TEM holder equiptted with a electrochemical cell having three electrodes and ionic liquid was made. With this cell, electrochemical reduction of metal ions to observe metal deposition by TEM. Electrochemical reduction of ionic liquid containing Li ion induced deposition of Li metal and that could be observed by TEM.

Research Products

• [Journal Article] In situ Scanning Electron Microscope Observation of Silicon Anode Reactions in Lithium-Ion Battery during Charge-Discharge Processes (2016)
  • Author(s): Chen, C.-Y.; Sano, T.; Tsuda, T.; Ui, K.; Oshima, Y.; Yamagata, M.; Ishikawa, M.; Haruta, M.; Doi, T.; Inaba, M.; Kuwabata, S.
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 36153-36153
  • DOI: 10.1038/srep36153
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] In situ SEM observation of the Si negative electrode reaction in an ionic-liquid-based lithium-ion secondary battery (2015)
  • Author(s): Tetsuya Tsuda, Tsukasa Kanetsuku, Teruki Sano, Yoshifumi Oshima, Koichi Ui, Masaki Yamagata, Masashi Ishikawa, and Susumu Kuwabata
  • Journal Title: Microscopy Volume: 64 Issue: 3 Pages: 159-168
  • DOI: 10.1093/jmicro/dfv003
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Development of Newfangled Nanotechnologies By Introducing Ionic Liquid to Vacuum Devices (2016)
  • Author(s): S. Kuwabata, T. Tsuda, T. Uematsu, and T. Torimoto
  • Organizer: PRiME2016
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2016-10-02
  • Int'l Joint Research / Invited
• [Presentation] ポリイミドバインダーを用いたSi負極における充放電挙動のin situ SEM観察 (2016)
  • Author(s): 澤村周,佐野輝樹,内田悟史,山縣雅紀,陳致
  • Organizer: 電気化学会第83大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2016-03-29
• [Presentation] イオン液体を用いるナノ材料の合成法と観察法の開 (2016)
  • Author(s): 桑畑進,津田哲哉,上松太郎,鳥本司
  • Organizer: 電気化学会第83大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2016-03-29
  • Invited