Creation of ordered porous carbon electrodes with controlled orientation of microscopic graphite domains

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05184
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Yokohama National University
• Principal Investigator: INAGAKI Satoshi 横浜国立大学, 大学院工学研究院, 准教授 (90367037)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 規則性メソポーラスカーボン / 電気二重層キャパシタ / 金属触媒 / グラファイト化 / エッジ面 / 水蒸気吸着等温線

Outline of Final Research Achievements

I have been working on the preparation of porous carbon materials to improve the charge-discharge capacitance of electric double-layer capacitors (EDLCs), especially those using ionic liquids as the electrolyte. The ordered mesoporous carbons focused on in this study can achieve fast charge-discharge rates because the electrolyte can permeate into mesopores, which are wider than micropores. Partial graphitization was achieved by effectively utilizing a metal catalyst, and a very high EDLC charge-discharge capacity was obtained with the prepared carbon electrode. In addition, as an academic development, we have established a method to evaluate the hydrophilicity of the edge surface of graphitic domains by measuring the heat of adsorption obtained from the water vapor adsorption isotherm.

Free Research Field

無機合成化学，触媒化学

Academic Significance and Societal Importance of the Research Achievements

多孔質炭素材料は，燃料電池，リチウムイオン二次電池，電気二重層キャパシタ（EDLC）などの発電・蓄電デバイスの電極として欠かせない基盤材料である。これらの発電・蓄電デバイスを活用したクリーンエネルギーの利用を高めていくには，高容量に発電・蓄電するための多孔質炭素電極の開発が求められる。本研究では金属触媒を用いることで多孔質炭素体のpartial graphitizationを進めることでEDLC充放電容量を飛躍的に向上しうることを見出した。すなわち学術面の発展のみならず，基盤材料の本質的な改善方法も提案するものである。