Less is more
Air-cathode microbial fuel cells (AC-MFC) use a gas-diffusion-layer (GDL) coating based on polytetrafluoroethylene applied to the cathode to prevent electrolyte leakage. However, this type of GDL can also lead to a decrease in MFC performance due to electron-transfer limitation, mass-transfer limita...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:251135 |
| Acceso en línea: | https://ddd.uab.cat/record/251135 https://dx.doi.org/urn:doi:10.1002/celc.202100908 |
| Access Level: | acceso abierto |
| Palabra clave: | Air-cathode External resistance Gas diffusion layer Microbial fuel cells Thickness Microbial fuel cell |
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Less is morea comprehensive study on the effects of the unmber of gas diffusion layers on air-cathode microbial fuel cellsSanchez Peña, Pilar|||0000-0002-7825-4890Rodriguez, Jesús|||0000-0002-8601-0466Montes, Raquel|||0000-0001-8805-9987Baeza, Juan Antonio|||0000-0003-1290-1669Gabriel, David|||0000-0002-7713-4192Baeza, Mireia|||0000-0002-2240-6410Guisasola, Albert|||0000-0002-3012-7964Air-cathodeExternal resistanceGas diffusion layerMicrobial fuel cellsThicknessMicrobial fuel cellAir-cathode microbial fuel cells (AC-MFC) use a gas-diffusion-layer (GDL) coating based on polytetrafluoroethylene applied to the cathode to prevent electrolyte leakage. However, this type of GDL can also lead to a decrease in MFC performance due to electron-transfer limitation, mass-transfer limitation or catalyst availability. This study provides a comprehensive understanding of the significance of the GDL coating, demonstrating the interaction between the number of GDL coatings and the external resistance (Rext) used. An experimental design in 28 mL AC-MFCs was prepared and conducted using two different Rext (10 and 249 Ω) and four different GDL coatings (1 to 4 layers). The coating effect was not significant when operating with a high Rext, where the electron transfer was the limiting process. However, when the Rext was low, the amount of polytetrafluoroethylene limited the cathode performance due to a significant decrease in the Pt availability on the catalytic surface. Thus, GDL-1 with 10 Ω as Rext reached 0.96 mA/cm2, 3-fold higher than that obtained with 249 Ω as Rext (ca. 0.30 mA/cm2). Besides, the current density did not vary noticeably in the other cathodes with 249 Ω as Rext. Contrarily, the current density with 10 Ω as Rext decreased as the number of GDL increased (0.74, 0.57 and 0.37 for GDL-2, GDL-3 and GDL-4 respectively). These values agreed with those of the polarization curve. Furthermore, limitations were also observed in electrochemical impedance spectroscopy measurements: the charge resistance increased with the number of GDL, related to the ease of electron flow. These values were18 Ω, 22 Ω, 53 Ω and 58 Ω for GDL-1, GDL-2, GDL-3 and GDL-4, respectively, for both 10 and 249 Ω cathodes. 22021-01-0120212021-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/251135https://dx.doi.org/urn:doi:10.1002/celc.202100908reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 CTQ2017-82404-RAgència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2018/FI_B01161Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-1175open accesshttp://purl.org/coar/access_right/c_abf2Aquesta url de drets no existeix a la base de dades.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2511352026-06-06T12:50:31Z |
| dc.title.none.fl_str_mv |
Less is more a comprehensive study on the effects of the unmber of gas diffusion layers on air-cathode microbial fuel cells |
| title |
Less is more |
| spellingShingle |
Less is more Sanchez Peña, Pilar|||0000-0002-7825-4890 Air-cathode External resistance Gas diffusion layer Microbial fuel cells Thickness Microbial fuel cell |
| title_short |
Less is more |
| title_full |
Less is more |
| title_fullStr |
Less is more |
| title_full_unstemmed |
Less is more |
| title_sort |
Less is more |
| dc.creator.none.fl_str_mv |
Sanchez Peña, Pilar|||0000-0002-7825-4890 Rodriguez, Jesús|||0000-0002-8601-0466 Montes, Raquel|||0000-0001-8805-9987 Baeza, Juan Antonio|||0000-0003-1290-1669 Gabriel, David|||0000-0002-7713-4192 Baeza, Mireia|||0000-0002-2240-6410 Guisasola, Albert|||0000-0002-3012-7964 |
| author |
Sanchez Peña, Pilar|||0000-0002-7825-4890 |
| author_facet |
Sanchez Peña, Pilar|||0000-0002-7825-4890 Rodriguez, Jesús|||0000-0002-8601-0466 Montes, Raquel|||0000-0001-8805-9987 Baeza, Juan Antonio|||0000-0003-1290-1669 Gabriel, David|||0000-0002-7713-4192 Baeza, Mireia|||0000-0002-2240-6410 Guisasola, Albert|||0000-0002-3012-7964 |
| author_role |
author |
| author2 |
Rodriguez, Jesús|||0000-0002-8601-0466 Montes, Raquel|||0000-0001-8805-9987 Baeza, Juan Antonio|||0000-0003-1290-1669 Gabriel, David|||0000-0002-7713-4192 Baeza, Mireia|||0000-0002-2240-6410 Guisasola, Albert|||0000-0002-3012-7964 |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Air-cathode External resistance Gas diffusion layer Microbial fuel cells Thickness Microbial fuel cell |
| topic |
Air-cathode External resistance Gas diffusion layer Microbial fuel cells Thickness Microbial fuel cell |
| description |
Air-cathode microbial fuel cells (AC-MFC) use a gas-diffusion-layer (GDL) coating based on polytetrafluoroethylene applied to the cathode to prevent electrolyte leakage. However, this type of GDL can also lead to a decrease in MFC performance due to electron-transfer limitation, mass-transfer limitation or catalyst availability. This study provides a comprehensive understanding of the significance of the GDL coating, demonstrating the interaction between the number of GDL coatings and the external resistance (Rext) used. An experimental design in 28 mL AC-MFCs was prepared and conducted using two different Rext (10 and 249 Ω) and four different GDL coatings (1 to 4 layers). The coating effect was not significant when operating with a high Rext, where the electron transfer was the limiting process. However, when the Rext was low, the amount of polytetrafluoroethylene limited the cathode performance due to a significant decrease in the Pt availability on the catalytic surface. Thus, GDL-1 with 10 Ω as Rext reached 0.96 mA/cm2, 3-fold higher than that obtained with 249 Ω as Rext (ca. 0.30 mA/cm2). Besides, the current density did not vary noticeably in the other cathodes with 249 Ω as Rext. Contrarily, the current density with 10 Ω as Rext decreased as the number of GDL increased (0.74, 0.57 and 0.37 for GDL-2, GDL-3 and GDL-4 respectively). These values agreed with those of the polarization curve. Furthermore, limitations were also observed in electrochemical impedance spectroscopy measurements: the charge resistance increased with the number of GDL, related to the ease of electron flow. These values were18 Ω, 22 Ω, 53 Ω and 58 Ω for GDL-1, GDL-2, GDL-3 and GDL-4, respectively, for both 10 and 249 Ω cathodes. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2 2021-01-01 2021 2021-01-01 |
| dc.type.none.fl_str_mv |
Article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://ddd.uab.cat/record/251135 https://dx.doi.org/urn:doi:10.1002/celc.202100908 |
| url |
https://ddd.uab.cat/record/251135 https://dx.doi.org/urn:doi:10.1002/celc.202100908 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 CTQ2017-82404-R Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2018/FI_B01161 Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-1175 |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Aquesta url de drets no existeix a la base de dades. https://creativecommons.org/licenses/by/4.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Aquesta url de drets no existeix a la base de dades. https://creativecommons.org/licenses/by/4.0/ |
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openAccess |
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application/pdf |
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reponame:Dipòsit Digital de Documents de la UAB instname:Universitat Autònoma de Barcelona |
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Universitat Autònoma de Barcelona |
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