2020 Fiscal Year Final Research Report
Fabrication of a thin solid electrolyte membrane on a liquid substrate for electrochemical applications
| Project/Area Number |
19K21933
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
鈴木 崇弘 大阪大学, 工学研究科, 助教 (90711630)
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| Project Period (FY) |
2019-06-28 – 2021-03-31
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| Keywords | 電解質膜 / 熱物質輸送 / ナノマイクロ熱工学 / 固体高分子形燃料電池 / レドックスフロー電池 |
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| Outline of Final Research Achievements |
In this research, we conducted research to realize thinning of electrolyte membranes used for polymer electrolyte fuel cells and other electrochemical energy conversion devices by forming them on the liquid surface, unlike the conventional ones. For clarifying the combination of the liquid containing the solid electrolyte and the liquid that serves as the base surface, simulations and experiments were carried out. We succeeded in fabricating an electrolyte thin film with a film thickness of approximately 5 micron-meter. The prepared electrolyte membrane was incorporated into a single cell of a polymer electrolyte fuel cell, and the ionic conduction characteristics were evaluated. Compared with commercially available electrolyte membranes, the ionic conduction resistance is smaller, which will lead to improved performance of electrochemical energy conversion devices in the future.
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| Free Research Field |
熱流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，固体高分子形燃料電池などに用いられる電解質膜の薄膜化がエネルギーの高効率利用に不可欠であることに着目し，従来とは異なる手法により，電解質膜の薄膜化を実現する研究を行った．液体表面を用いた電解質膜の作製は，非混和性2流体と周囲気体の3相から構成され，溶媒の蒸発を伴う複雑な系であるが，相間の界面エネルギー差と環境条件などを制御することで電解質膜の薄膜化が可能であることで明らかにした．さらに本手法により作製された電解質膜について高分子構造の変化が示唆され，さらなるイオン伝導抵抗の低減につながる知見を得た．
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