Development of Multiredox-activie Organic Electrodes for Post Lithium-ion Batteries using Aqueous Electrolytes

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05671
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Kyushu University
• Principal Investigator: Ito Masato 九州大学, 先導物質化学研究所, 准教授 (20293037)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 水系ポストリチウムイオン電池 / マルチレドックス / トルキセノン

Outline of Final Research Achievements

A variety of truxenone derivatives have been examined as multiredox-active organic electrodes for Na-ion batteries that are potentially beneficial for the reduction of manufacturing cost and environmental burden. They showed the reversible capacity based on their characteristic three electron redox reaction with non-aqueous electrolytes, while they gave poorer results with aqueous electrolytes. The stability of triradical species generated at the discharge termini may potentially contribute to the improvement of their coulombic efficiency and capacity retention rates.

Free Research Field

有機化学

Academic Significance and Societal Importance of the Research Achievements

芳香族ケトン類と金属ナトリウムからケチルラジカルが生じる反応が電極ー電解液界面において可逆的に生起することを見いだし、フルオレノン骨格が縮合した構造をもつトルキセノン誘導体がナトリウムイオン電池のマルチレドックス有機電極として優れた電気化学特性を示すことを明らかにした。しかしながら蓄電池の低コスト化や環境負荷低減の鍵となる水系電解液に適合する高容量有機電極の設計合成は今後の課題となった。