Creation of innovative process of porous structure by applying electric potential

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01695
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: Kyushu University
• Principal Investigator: Inoue Gen 九州大学, 工学研究院, 教授 (40336003)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 混相流 / 多孔質構造 / 電気化学 / 粒子制御 / 直接計測

Outline of Final Research Achievements

Porous electrode layer is often used in various kinds of electrochemical devices. However, it is difficult to control its porous structure in wet fabrication process because of disturbance. In order to solve this problem, the bubble template method by applying potential in this wet process was examined. And we tried to understand the relationship between bubble behavior and porous structure, to evaluate this efficiency by polymer electrolyte fuel cell test. Moreover, we considered effect of this heterogeneous structure on cell performance by numerical simulation. From this result, it was found that this template method was effective for improvement of mass transport performance. This knowledge is unique by comparing conventional homogeneous porous electrode layer.

Free Research Field

化学工学

Academic Significance and Societal Importance of the Research Achievements

連続生産中の電位印加の方法や、発生ガスの回収などを克服する必要があるが、本研究成果は従来の湿式プロセスの改善に貢献できると期待できる。つまり、均質な多孔構造の形成を狙いとするのではなく、その後の操作環境における、イオンやガスの輸送特性を考慮すると、意図的に不均一な構造が望ましいことを示唆している。これまでの経験に基づき条件選定がなされてきたプロセスにおいて、新たな能動的な制御法を提案するものである。