Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers
Gas diffusion layers (GDLs) in high-temperature, high-humidity, and high-electric-potential environments can be affected by the carbon corrosion and degradation of Polytetrafluoroethylene (PTFE) network structures, resulting in reduced reliability and hydrophobicity. By using cyclic voltammetry and...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/23/7765 |
| _version_ | 1797400239596896256 |
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| author | Jianan Wang Lingfeng Gao Tianshu Liao Feng Cheng Daming Zhou Shiyang Hua |
| author_facet | Jianan Wang Lingfeng Gao Tianshu Liao Feng Cheng Daming Zhou Shiyang Hua |
| author_sort | Jianan Wang |
| collection | DOAJ |
| description | Gas diffusion layers (GDLs) in high-temperature, high-humidity, and high-electric-potential environments can be affected by the carbon corrosion and degradation of Polytetrafluoroethylene (PTFE) network structures, resulting in reduced reliability and hydrophobicity. By using cyclic voltammetry and offline characterization, a high-potential scanning of 1–1.5 V is applied to the GDL in the three-electrode system, considering the role of gradient graphitization degree and pore size structure in corrosion. Accelerating the electrochemical corrosion process of carbon and PTFE allows the identification of corrosion location, extent, and determinants. The results indicate that after 800 cycles of high-potential triangulation scanning, the graphitization of gas diffusion base has the most significant impact on the GDL’s durability. On the other hand, the durability of the GDL’s microporous layer is influenced by its small pore size structure rather than its graphitization degree. Furthermore, the corrosion process of GDLs with a small pore size structure tends to be relatively slow, providing a basis for GDL selection and durability prediction. |
| first_indexed | 2024-03-09T01:51:39Z |
| format | Article |
| id | doaj.art-3d91ec84035d44aa991558d3245113e4 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T01:51:39Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3d91ec84035d44aa991558d3245113e42023-12-08T15:14:43ZengMDPI AGEnergies1996-10732023-11-011623776510.3390/en16237765Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion LayersJianan Wang0Lingfeng Gao1Tianshu Liao2Feng Cheng3Daming Zhou4Shiyang Hua5Wuhan Institute of Marine Electric Propulsion, Wuhan 430000, ChinaWuhan Institute of Marine Electric Propulsion, Wuhan 430000, ChinaWuhan Institute of Hydrogen and Fuel Cell Industrial Technology, Wuhan 430000, ChinaWuhan Institute of Hydrogen and Fuel Cell Industrial Technology, Wuhan 430000, ChinaSchool of Astronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaWuhan Institute of Marine Electric Propulsion, Wuhan 430000, ChinaGas diffusion layers (GDLs) in high-temperature, high-humidity, and high-electric-potential environments can be affected by the carbon corrosion and degradation of Polytetrafluoroethylene (PTFE) network structures, resulting in reduced reliability and hydrophobicity. By using cyclic voltammetry and offline characterization, a high-potential scanning of 1–1.5 V is applied to the GDL in the three-electrode system, considering the role of gradient graphitization degree and pore size structure in corrosion. Accelerating the electrochemical corrosion process of carbon and PTFE allows the identification of corrosion location, extent, and determinants. The results indicate that after 800 cycles of high-potential triangulation scanning, the graphitization of gas diffusion base has the most significant impact on the GDL’s durability. On the other hand, the durability of the GDL’s microporous layer is influenced by its small pore size structure rather than its graphitization degree. Furthermore, the corrosion process of GDLs with a small pore size structure tends to be relatively slow, providing a basis for GDL selection and durability prediction.https://www.mdpi.com/1996-1073/16/23/7765proton-exchange membrane fuel cellgas diffusion layerdurabilitydegree of graphitizationpore structureelectrochemical corrosion |
| spellingShingle | Jianan Wang Lingfeng Gao Tianshu Liao Feng Cheng Daming Zhou Shiyang Hua Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers Energies proton-exchange membrane fuel cell gas diffusion layer durability degree of graphitization pore structure electrochemical corrosion |
| title | Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers |
| title_full | Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers |
| title_fullStr | Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers |
| title_full_unstemmed | Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers |
| title_short | Experimental Study on the Effect of Carbon Graphitization Degree and Pore Structure on the Electrochemical Durability of Gas Diffusion Layers |
| title_sort | experimental study on the effect of carbon graphitization degree and pore structure on the electrochemical durability of gas diffusion layers |
| topic | proton-exchange membrane fuel cell gas diffusion layer durability degree of graphitization pore structure electrochemical corrosion |
| url | https://www.mdpi.com/1996-1073/16/23/7765 |
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