Development of all-carbon electric double layer capacitor using graphene oxide

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05673
• 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: Kumamoto University
• Principal Investigator: Koinuma Michio 熊本大学, 産業ナノマテリアル研究所, 准教授 (70284742)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 酸化グラフェン / 酸素官能基 / イオン透過 / 電気化学キャパシタ

Outline of Final Research Achievements

It was possible to control the oxidation state of graphene oxide, which can be produced by simply chemically oxidizing inexpensive graphite.
Graphene oxides with controlled oxygen functional groups (having only epoxy groups) have been found to have some different properties than graphene oxides with various oxygen functional groups.
For example, it was found that the permeation of metal ions between layers does not occur at all, the thermal stability is high, and the resistance to acids and bases is also high. This is because graphene oxide, which is a single oxygen functional group, has a wide range of uniform structure and is stable to chemical reactions.

Free Research Field

無機材料化学

Academic Significance and Societal Importance of the Research Achievements

単一の酸素官能基（エポキシ基だけ）を持つ酸化グラフェンを作製し、その構造を決定すること、およびその酸化グラフェンのイオン透過性、熱安定性などの特性を評価することによって、炭素関連材料の分野で新たな知見を与えることができた。
この新規な酸化グラフェンは、燃料電池や電気化学キャパシタンスなどのデバイスのさらなる性能向上への材料として活用できると期待される