Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell
The effects of the operational conditions on the membrane and electrode properties on a polymer electrolyte fuel cell (PEFC) were investigated as a function of the cell and the gas humidifiers temperatures, the thickness of the membrane, the impregnation with phosphotungstic acid (PWA), and the vari...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2002-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000400012 |
| _version_ | 1819230561504329728 |
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| author | Passos Raimundo R. Ticianelli Edson A. |
| author_facet | Passos Raimundo R. Ticianelli Edson A. |
| author_sort | Passos Raimundo R. |
| collection | DOAJ |
| description | The effects of the operational conditions on the membrane and electrode properties on a polymer electrolyte fuel cell (PEFC) were investigated as a function of the cell and the gas humidifiers temperatures, the thickness of the membrane, the impregnation with phosphotungstic acid (PWA), and the variation of the Nafion and Teflon contents in the gas diffusion electrodes. An increase of the membrane resistance was observed when the PEFC is operated at temperatures equal or higher than those of the gas humidifiers, and this is more apparent for thicker electrolyte films. In the presence of PWA, the physicochemical properties of the membrane do not appreciably change with temperature. However, in this case, a lower humidification temperature affects the electrode performance. Changes on the Nafion loading in the electrodes do not lead to any significant effect in the electrode and membrane properties. For high Teflon contents there is a small lowering of the membrane conductivity. |
| first_indexed | 2024-12-23T11:31:02Z |
| format | Article |
| id | doaj.art-87c3eaf90ad946d088bc81bfbd38202f |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-12-23T11:31:02Z |
| publishDate | 2002-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-87c3eaf90ad946d088bc81bfbd38202f2022-12-21T17:48:48ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50532002-01-01134483489Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cellPassos Raimundo R.Ticianelli Edson A.The effects of the operational conditions on the membrane and electrode properties on a polymer electrolyte fuel cell (PEFC) were investigated as a function of the cell and the gas humidifiers temperatures, the thickness of the membrane, the impregnation with phosphotungstic acid (PWA), and the variation of the Nafion and Teflon contents in the gas diffusion electrodes. An increase of the membrane resistance was observed when the PEFC is operated at temperatures equal or higher than those of the gas humidifiers, and this is more apparent for thicker electrolyte films. In the presence of PWA, the physicochemical properties of the membrane do not appreciably change with temperature. However, in this case, a lower humidification temperature affects the electrode performance. Changes on the Nafion loading in the electrodes do not lead to any significant effect in the electrode and membrane properties. For high Teflon contents there is a small lowering of the membrane conductivity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000400012polymer electrolyte fuel cellmembranegas diffusion electrodewater transport |
| spellingShingle | Passos Raimundo R. Ticianelli Edson A. Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell Journal of the Brazilian Chemical Society polymer electrolyte fuel cell membrane gas diffusion electrode water transport |
| title | Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| title_full | Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| title_fullStr | Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| title_full_unstemmed | Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| title_short | Effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| title_sort | effects of the operational conditions on the membrane and electrode properties of a polymer electrolyte fuel cell |
| topic | polymer electrolyte fuel cell membrane gas diffusion electrode water transport |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532002000400012 |
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