Synthesis of electron acceptors involving fluorine atoms and their application to organic cathod active materials

2015 Fiscal Year Final Research Report

• Project/Area Number: 24550213
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional materials/Devices
• Research Institution: Osaka Prefecture University
• Principal Investigator: Matsubara Hiroshi 大阪府立大学, 理学(系)研究科(研究院), 准教授 (20239073)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: ベンゾキノン / 酸化剤 / 有機二次電池 / 正極活物質

Outline of Final Research Achievements

In this study, we developed novel powerful oxidisers and cathode active materials of organic secondary batteries utilizing electron-withdrawing effect of perfluoroalkyl groups. 1,4-Benzoquinone derivatives bearing perfluoroalkyl groups (fluorous benzoquinones) were prepared and employed in the deprotection of silyl ethers. In addition, the prepared fluorous benzoquinones were evaluated as cathode active materials in rechargeable batteries; the cells exhibited higher voltage (3 V) in their charge-discharge curves. The fluorous benzoquinones effectively worked as positive-electrode materials, with improved charge-discharge cycle performance in the cells due to the stability of the benzoquinones toward decomposition during cycling. Bromine-substituted benzoquinones revealed high stability in charge-discharge cycle performance. We also attempted benzoquinone dimers and trimers to improve stability in charge and discharge cycle performance of the cells.

Free Research Field

有機合成化学