Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution
Abstract The pore size distribution of the catalyst layer (CL) significantly influences the effective diffusion coefficient (EDC) of the reactant gas due to the Knudsen diffusion effect in the proton exchange membrane fuel cell (PEMFC). In this study, a novel fractal method is proposed to evaluate t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2021-01-01
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| Series: | Nano Select |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/nano.202000136 |
| _version_ | 1818741323187879936 |
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| author | Yan Yin Shiyu Wu Yanzhou Qin Yuwen Liu Junfeng Zhang |
| author_facet | Yan Yin Shiyu Wu Yanzhou Qin Yuwen Liu Junfeng Zhang |
| author_sort | Yan Yin |
| collection | DOAJ |
| description | Abstract The pore size distribution of the catalyst layer (CL) significantly influences the effective diffusion coefficient (EDC) of the reactant gas due to the Knudsen diffusion effect in the proton exchange membrane fuel cell (PEMFC). In this study, a novel fractal method is proposed to evaluate the Knudsen diffusion based on the pore size distribution of the CL, which is then incorporated in the calculation of the EDC of oxygen in the CL. It suggests that the EDC of oxygen obtained from the proposed method considering the pore size distribution is greatly smaller than that obtained from the conventional Bruggeman correlation, hence resulting in much smaller maximum current density of PEMFC. |
| first_indexed | 2024-12-18T01:54:48Z |
| format | Article |
| id | doaj.art-c24c225410144c0a8fb281ca065281db |
| institution | Directory Open Access Journal |
| issn | 2688-4011 |
| language | English |
| last_indexed | 2024-12-18T01:54:48Z |
| publishDate | 2021-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Nano Select |
| spelling | doaj.art-c24c225410144c0a8fb281ca065281db2022-12-21T21:24:56ZengWiley-VCHNano Select2688-40112021-01-012111612010.1002/nano.202000136Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distributionYan Yin0Shiyu Wu1Yanzhou Qin2Yuwen Liu3Junfeng Zhang4State Key Laboratory of Engines Tianjin University Tianjin ChinaState Key Laboratory of Engines Tianjin University Tianjin ChinaState Key Laboratory of Engines Tianjin University Tianjin ChinaState Key Laboratory of Engines Tianjin University Tianjin ChinaState Key Laboratory of Engines Tianjin University Tianjin ChinaAbstract The pore size distribution of the catalyst layer (CL) significantly influences the effective diffusion coefficient (EDC) of the reactant gas due to the Knudsen diffusion effect in the proton exchange membrane fuel cell (PEMFC). In this study, a novel fractal method is proposed to evaluate the Knudsen diffusion based on the pore size distribution of the CL, which is then incorporated in the calculation of the EDC of oxygen in the CL. It suggests that the EDC of oxygen obtained from the proposed method considering the pore size distribution is greatly smaller than that obtained from the conventional Bruggeman correlation, hence resulting in much smaller maximum current density of PEMFC.https://doi.org/10.1002/nano.202000136catalyst layereffective diffusion coefficientfuel cellKnudsen diffusionpore size |
| spellingShingle | Yan Yin Shiyu Wu Yanzhou Qin Yuwen Liu Junfeng Zhang Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution Nano Select catalyst layer effective diffusion coefficient fuel cell Knudsen diffusion pore size |
| title | Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution |
| title_full | Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution |
| title_fullStr | Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution |
| title_full_unstemmed | Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution |
| title_short | Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution |
| title_sort | evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of pemfc using the fractal method considering the pore size distribution |
| topic | catalyst layer effective diffusion coefficient fuel cell Knudsen diffusion pore size |
| url | https://doi.org/10.1002/nano.202000136 |
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