2023 Fiscal Year Final Research Report
Enhancement of robustness and detection of abnormal operation conditions for marine fuel cells
| Project/Area Number |
21H01549
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 24020:Marine engineering-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 燃料電池 / ロバスト性 / 耐久性 / ガス拡散層 / 水管理 |
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| Outline of Final Research Achievements |
The application of polymer electrolyte fuel cells (PEFCs) for marine vessels will be an effective means of reducing greenhouse gas (GHG) emissions. The present study investigates a novel double microporous layer (MPL) coated gas diffusion layer (GDL). A thin hydrophilic layer coated on the hydrophobic MPL is effective at conserving the humidity of the membrane electrode assembly (MEA) under low humidity conditions. A hydrophilic MPL in the double MPL enhances the ability of the MPL to discharge water at the catalyst layer, effectively reducing water flooding. The double MPL exhibited a substantially reduced the oxygen transport resistance at the interface between the MPL and the catalyst layer. An appropriate MPL coated GDL is effective at enhancing marine PEFC performance under both low and high humidity conditions.
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| Free Research Field |
船舶海洋工学
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| Academic Significance and Societal Importance of the Research Achievements |
従来から一般に適用されている撥水性マイクロポーラス層（MPL）付きガス拡散層の場合，耐ドライアップ性と耐フラッディング性を高めるための設計指針が異なっており，耐ドライアップ性を向上させたMPL付き拡散層は耐フラッディング性が低下することが問題である．本研究で考案した親水・撥水MPLは，親水性の付与により電解質膜の保湿性が向上して耐ドライアップ性が向上する．また親水層が撥水MPLへの液水導入を促進して電極触媒層の排水性を向上させるため耐フラッディングも向上する．従って長時間の高負荷運転が要求される舶用燃料電池の発電性能と信頼性・耐久性を向上させるうえで貢献できるものと考えられる．
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