CNT growth on solid electrolyte with electrochemically controlled oxigen activity, and the direct fabrication on SOFC

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05138
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27020:Chemical reaction and process system engineering-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Hasegawa Kei 東京工業大学, 物質理工学院, 助教 (50644944)
• Co-Investigator(Kenkyū-buntansha): 伊原 学 東京工業大学, 物質理工学院, 教授 (90270884)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 固体酸化物燃料電池 / カーボンナノチューブ / 酸素活量

Outline of Final Research Achievements

We examined the technology to introduce (CNT) as a functional material. So far, we have devised a method to directly synthesize CNTs in the cell and use them as they are, and tried to directly synthesize CNTs in the cell, but the growth was not equivalent to that on Al2O3 etc., so the electrode potential in SOFC Focusing on the oxygen activity that can be controlled by, I thought that it might be possible to control the coverage of oxygen that inhibits CNT growth by changing the electrode potential. It was clarified that in the method of introducing and growing metal nanoparticles in the SOFC electrode porosity, the CNT growth is changed by the influence of voltage application, and at the same time, the mass transfer during the CNT growth is affected.

Free Research Field

化学工学

Academic Significance and Societal Importance of the Research Achievements

本研究は、固体酸化物燃料電池(SOFC)燃料極に対し、炭素、特にカーボンナノチューブ（CNT）を機能材料として導入する技術の提案と、その際に明らかになったCNT合成時の課題を明らかにすることを目的とした。酸化物上の金属ナノ粒子に対して高温で炭素源ガスを供給するという一般的なCNT合成に対して、酸化物がイオン電導性で酸素活量を有し、1μｍ程度の多孔質であるという物性、構造の違いがCNT成長に与える影響を、それぞれ切り分けて明らかにした。