Development of novel ionic liquid electrolytes with potassium ion as a charge carrier

• Project/Area Number: 18K14320
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Kyoto University
• Principal Investigator: Yamamoto Takayuki 京都大学, エネルギー理工学研究所, 助教 (30783823)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: イオン液体 / カリウム電池

Outline of Final Research Achievements

In the present research, with an aim of construction of potassium secondary batteries, various kinds of ionic liquid (IL) electrolytes were developed and their compatibility with several active materials was investigated. Compared to the previously reported IL electrolyte, K[FSA]-[C3C1pyrr][FSA] IL, it was found that K[FSA]-[C2C1im][FSA] IL exhibited higher ionic conductivities at room temperature and that K[FTA]-[C4C1pyrr][FTA] IL showed a wider liquidus temperature range including room temperature. Then, several negative electrode materials including tin and graphite worked properly in selected IL electrolytes, indicating the feasibility of safe and high-performance potassium secondary batteries using IL electrolytes.

Academic Significance and Societal Importance of the Research Achievements

従来から代表研究者が開発に向けて取り組んでいるカリウム二次電池は、最近数年間で非常に注目を集めており、世界中で多くの研究が報告されている。一方で、高安全性を有するイオン液体電解質に関する報告は依然として少ない。本研究で得られた成果は、安全性と性能を兼ね備えたカリウム二次電池の実現可能性を示すものであり、学術的にも社会的にも意義のあるものと考えられる。

Research Products

• [Journal Article] Highly Conductive Ionic Liquid Electrolytes for Potassium-Ion Batteries (2021)
  • Author(s): Takayuki Yamamoto, Ryohei Matsubara, Toshiyuki Nohira
  • Journal Title: Journal of Chemical & Engineering Data Volume: 66 Issue: 2 Pages: 1081-1088
  • DOI: 10.1021/acs.jced.0c00879
  • NAID: 120006960276
  • Peer Reviewed / Open Access
• [Journal Article] Comparative Study of M[N(SO2F)(SO2CF3)]-[N-Butyl-N-methylpyrroridinium][N(SO2F)(SO2CF3)] (M = Li, Na, K, Rb, Cs) Ionic Liquid Electrolytes (2020)
  • Author(s): Takayuki Yamamoto, Shu Nishijima, Toshiyuki Nohira
  • Journal Title: The Journal of Physical Chemistry B Volume: 124 Issue: 38 Pages: 8380-8387
  • DOI: 10.1021/acs.jpcb.0c06578
  • Peer Reviewed / Open Access
• [Journal Article] Application of Ionic Liquid as K-Ion Electrolyte of Graphite//K2Mn[Fe(CN)6] Cell (2020)
  • Author(s): Hiroo Onuma, Kei Kubota, Shotaro Muratsubaki, Tomooki Hosaka, Ryoichi Tatara, Takayuki Yamamoto, Kazuhiko Matsumoto, Toshiyuki Nohira, Rika Hagiwara, Hiroshi Oji, Satoshi Yasuno, Shinichi Komaba
  • Journal Title: ACS Energy Letters Volume: 5 Issue: 9 Pages: 2849-2857
  • DOI: 10.1021/acsenergylett.0c01393
  • Peer Reviewed
• [Journal Article] Tin negative electrodes using an FSA-based ionic liquid electrolyte: improved performance of potassium secondary batteries (2020)
  • Author(s): T. Yamamoto, T. Nohira
  • Journal Title: Chemical Communications Volume: 56 Issue: 17 Pages: 2538-2541
  • DOI: 10.1039/d0cc00209g
  • NAID: 120006960278
  • Peer Reviewed
• [Journal Article] Potassiation and Depotassioation Properties of Sn₄P₃ Electrode in an Ionic-Liquid Electrolyte (2019)
  • Author(s): DOMI Yasuhiro、USUI Hiroyuki、NAKABAYASHI Eisuke、YAMAMOTO Takayuki、NOHIRA Toshiyuki、SAKAGUCHI Hiroki
  • Journal Title: Electrochemistry Volume: 87 Issue: 6 Pages: 333-335
  • DOI: 10.5796/electrochemistry.19-00052
  • NAID: 130007741815
  • ISSN: 1344-3542, 2186-2451
  • Year and Date: 2019-11-05
  • Peer Reviewed / Open Access
• [Presentation] FTA系イオン液体の電解質特性評価およびアルカリ金属イオン二次電池への応用 (2020)
  • Author(s): 西島士湧, Alisha Yadav, 山本貴之, 野平俊之
  • Organizer: 2020年度第3回関西電気化学研究会
• [Presentation] M[FTA]-[C4C1pyrr][FTA] (M = Li, Na, K, Rb, Cs)イオン液体電解質の特性評価および二次電池への応用 (2020)
  • Author(s): 西島士湧, 山本貴之, 野平俊之
  • Organizer: 第52回溶融塩化学討論会
• [Presentation] Comparative Studies on Graphite and Hard Carbon Negative Electrodes for Alkali Metal-Ion Batteries Using FSA-Based Ionic Liquids (2020)
  • Author(s): Alisha Yadav, Shu Nishijima, Takayuki Yamamoto, Toshiyuki Nohira
  • Organizer: 238th Meeting of The Electrochemical Society (PRiME2020)
  • Int'l Joint Research
• [Presentation] FTA-Based Ionic Liquids: Promising Electrolytes for Alkali Metal-Ion Secondary Batteries (2020)
  • Author(s): Shu Nishijima, Alisha Yadav, Takayuki Yamamoto, Toshiyuki Nohira
  • Organizer: 238th Meeting of The Electrochemical Society (PRiME2020)
  • Int'l Joint Research
• [Presentation] Electrochemical Potassiation/Depotassiation Properties of Various Antimony-Based Electrodes (2020)
  • Author(s): Kazuki Kuritani, Yasuhiro Domi, Hiroyuki Usui, Takayuki Yamamoto, Toshiyuki Nohira, Hiroki Sakaguchi
  • Organizer: The 11th International Symposium of Advanced Energy Science
  • Int'l Joint Research
• [Presentation] Physicochemical properties of M[FTA]-[C4C1pyrr][FTA] ionic liquids (M = Li, Na, K, Rb, Cs) (2020)
  • Author(s): T. Yamamoto, S. Nishijima, T. Nohira
  • Organizer: The 100th Annual Meeting of The Chemical Society of Japan
• [Presentation] アルカリ金属イオン二次電池用FTA系イオン液体電解質の開発 (2020)
  • Author(s): 西島士湧，山本貴之，野平俊之
  • Organizer: 電気化学会第87回大会
• [Presentation] M[FTA]-[C4C1pyrr][FTA] (M = Li, Na, K, Rb, Cs)イオン液体電解質の特性評価 (2019)
  • Author(s): 西島士湧，山本貴之，野平俊之
  • Organizer: 第10回イオン液体討論会
• [Presentation] Charge-Discharge Properties of Sn-P Negative Electrode in an Ionic-Liquid Electrolyte for K-Ion Battery (2019)
  • Author(s): E. Nakabayashi, Y. Domi, H. Usui, T. Yamamoto, T. Nohira, H. Sakaguchi
  • Organizer: The 10th International Symposium of Advanced Energy Science
  • Int'l Joint Research
• [Presentation] M[FTA]-[C4C1pyrr][FSA] (M = Li, Na, K, Cs)イオン液体電解質の特性評価 (2019)
  • Author(s): 西島士湧，山本貴之，野平俊之
  • Organizer: 第83回マテリアルズ・テーラリング研究会
• [Presentation] カリウム二次電池用FSA系イオン液体電解質中におけるスズ負極の充放電特性 (2019)
  • Author(s): 山本貴之，松本一彦，萩原理加，野平俊之
  • Organizer: 電気化学会第86回大会
• [Presentation] カリウムイオン電池用FSA系イオン液体電解質の開発 (2019)
  • Author(s): 山本貴之，松原諒平，松本一彦，萩原理加，野平俊之
  • Organizer: 日本化学会第99春季年会
• [Presentation] Development of ionic liquid electrolytes for potassium-ion batteries with a wide operating temperature range (2018)
  • Author(s): T. Yamamoto, K. Matsumoto, R. Hagiwara, T. Nohira
  • Organizer: The 6th Asian-Pacific Conference on Ionic Liquids & Green Processes (APCIL-6)
  • Int'l Joint Research
• [Presentation] カリウムイオン電池用K[FSA]-[C2C1im][FSA]イオン液体電解質の物性評価 (2018)
  • Author(s): 松原諒平，山本貴之，松本一彦，萩原理加，野平俊之
  • Organizer: 第9回イオン液体討論会
• [Presentation] K[FSA]-[C3C1pyrr][FSA]イオン液体のカリウムイオン電池用電解質としての特性評価 (2018)
  • Author(s): 山本貴之，松本一彦，萩原理加，野平俊之
  • Organizer: 第9回イオン液体討論会
• [Presentation] Physicochemical and electrochemical properties of FSA-based ionic liquid electrolytes for K-ion batteries (2018)
  • Author(s): T. Yamamoto, K. Matsumoto, R. Hagiwara, T. Nohira
  • Organizer: 234th Meeting of The Electrochemical Society (AiMES 2018)
  • Int'l Joint Research