Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells
Polymer electrolyte fuel cells (PEFCs) need to achieve long-term durability for widespread commercialization. Chemical degradation of the perfluorosulfonic acid (PFSA) membrane caused by radical species (·OH) can be mitigated by adding cerium ions as radical scavengers; however, cerium ions migrate...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2025-06-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-00055/_html/-char/en |
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| author | Aika TAKEZAWA Yoichiro TSUJI Takahiko ASAOKA Maria OHKI Oki SEKIZAWA Kiyofumi NITTA Yuki ORIKASA |
| author_facet | Aika TAKEZAWA Yoichiro TSUJI Takahiko ASAOKA Maria OHKI Oki SEKIZAWA Kiyofumi NITTA Yuki ORIKASA |
| author_sort | Aika TAKEZAWA |
| collection | DOAJ |
| description | Polymer electrolyte fuel cells (PEFCs) need to achieve long-term durability for widespread commercialization. Chemical degradation of the perfluorosulfonic acid (PFSA) membrane caused by radical species (·OH) can be mitigated by adding cerium ions as radical scavengers; however, cerium ions migrate within the membrane, potentially reducing their effectiveness. In this study, we have developed an operando high-energy microbeam X-ray fluorescence (XRF) system to visualize the distribution of cerium ions in the electrolyte membrane and catalyst layers under fuel cell operating conditions. Scanning across the membrane and catalyst layers with sub-micron spatial resolution directly observes rapid migration of cerium ions from the membrane to the cathode side immediately after current loading. Conversely, when the cell is returned to open-circuit voltage (OCV), the cerium ions diffuse back into the membrane. The amount of migrated cerium ions depends on the current density, suggesting that higher current loads accelerate cerium ion transport toward the cathode. |
| format | Article |
| id | doaj-art-b0a72c1a1b494d2f96e4dc8a4ab71f6a |
| institution | DOAJ |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj-art-b0a72c1a1b494d2f96e4dc8a4ab71f6a2025-08-20T03:22:37ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-06-0193606700406700410.5796/electrochemistry.25-00055electrochemistryOperando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel CellsAika TAKEZAWA0Yoichiro TSUJI1Takahiko ASAOKA2Maria OHKI3Oki SEKIZAWA4Kiyofumi NITTA5Yuki ORIKASA6https://orcid.org/0000-0002-9869-9520Department of Applied Chemistry, Ritsumeikan UniversityFuel Cell Cutting-Edge Research Center Technology Research Association (FC-Cubic)Fuel Cell Cutting-Edge Research Center Technology Research Association (FC-Cubic)Fuel Cell Cutting-Edge Research Center Technology Research Association (FC-Cubic)Japan Synchrotron Radiation Research Institute (JASRI)Japan Synchrotron Radiation Research Institute (JASRI)Department of Applied Chemistry, Ritsumeikan UniversityPolymer electrolyte fuel cells (PEFCs) need to achieve long-term durability for widespread commercialization. Chemical degradation of the perfluorosulfonic acid (PFSA) membrane caused by radical species (·OH) can be mitigated by adding cerium ions as radical scavengers; however, cerium ions migrate within the membrane, potentially reducing their effectiveness. In this study, we have developed an operando high-energy microbeam X-ray fluorescence (XRF) system to visualize the distribution of cerium ions in the electrolyte membrane and catalyst layers under fuel cell operating conditions. Scanning across the membrane and catalyst layers with sub-micron spatial resolution directly observes rapid migration of cerium ions from the membrane to the cathode side immediately after current loading. Conversely, when the cell is returned to open-circuit voltage (OCV), the cerium ions diffuse back into the membrane. The amount of migrated cerium ions depends on the current density, suggesting that higher current loads accelerate cerium ion transport toward the cathode.https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-00055/_html/-char/enpolymer electrolyte fuel cellpolymer electrolyte membraneradical quencheroperando xrf analysis |
| spellingShingle | Aika TAKEZAWA Yoichiro TSUJI Takahiko ASAOKA Maria OHKI Oki SEKIZAWA Kiyofumi NITTA Yuki ORIKASA Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells Electrochemistry polymer electrolyte fuel cell polymer electrolyte membrane radical quencher operando xrf analysis |
| title | Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells |
| title_full | Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells |
| title_fullStr | Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells |
| title_full_unstemmed | Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells |
| title_short | Operando X-ray Fluorescence Analysis of Through-plane Cerium Ion Radical Quencher Migration in Polymer Electrolyte Fuel Cells |
| title_sort | operando x ray fluorescence analysis of through plane cerium ion radical quencher migration in polymer electrolyte fuel cells |
| topic | polymer electrolyte fuel cell polymer electrolyte membrane radical quencher operando xrf analysis |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-00055/_html/-char/en |
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