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Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane

This work exhibits an effective approach to enhance the performance of membrane-electrode assembly (MEA) with KH(5)(PO(4))(2)-doped PBI membrane, by adding phosphoric acid (PA) in the catalyst layer (CL). The ohmic resistance and single-cell performance of the MEA, treated with PA, are reduced by ~8...

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Autores principales: Li, Yifan, Hu, Jing, Papavasiliou, Joan, Fu, Zhiyong, Chen, Li, Li, Haibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9331839/
https://www.ncbi.nlm.nih.gov/pubmed/35893446
http://dx.doi.org/10.3390/membranes12080728
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author Li, Yifan
Hu, Jing
Papavasiliou, Joan
Fu, Zhiyong
Chen, Li
Li, Haibin
author_facet Li, Yifan
Hu, Jing
Papavasiliou, Joan
Fu, Zhiyong
Chen, Li
Li, Haibin
author_sort Li, Yifan
collection PubMed
description This work exhibits an effective approach to enhance the performance of membrane-electrode assembly (MEA) with KH(5)(PO(4))(2)-doped PBI membrane, by adding phosphoric acid (PA) in the catalyst layer (CL). The ohmic resistance and single-cell performance of the MEA, treated with PA, are reduced by ~80% and improved by ~800%, respectively, compared to that of untreated MEA. Based on the MEA pretreated with PA, the influence of humidity and temperature on the resistance and the single-cell performance are investigated. Under humidified gas conditions, the ohmic resistance of MEA is reduced but the charge transfer resistance is slightly increased. Regarding the effect of temperature, the ohmic resistance of MEA becomes lower as the temperature elevates from 140 to 180 °C, but increases at 200 °C. The maximum peak power density presents at 180 °C and 20% RH with 454 mW cm(−2). The peak power density is favored with temperature increase from 140 to 180 °C, but decreases with further increase to 200 °C. Moreover, when dry gas conditions are employed, the output performance is unstable, suggesting that humidification is necessary to inhibit degradation for a long-term stability test.
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spelling pubmed-93318392022-07-29 Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane Li, Yifan Hu, Jing Papavasiliou, Joan Fu, Zhiyong Chen, Li Li, Haibin Membranes (Basel) Article This work exhibits an effective approach to enhance the performance of membrane-electrode assembly (MEA) with KH(5)(PO(4))(2)-doped PBI membrane, by adding phosphoric acid (PA) in the catalyst layer (CL). The ohmic resistance and single-cell performance of the MEA, treated with PA, are reduced by ~80% and improved by ~800%, respectively, compared to that of untreated MEA. Based on the MEA pretreated with PA, the influence of humidity and temperature on the resistance and the single-cell performance are investigated. Under humidified gas conditions, the ohmic resistance of MEA is reduced but the charge transfer resistance is slightly increased. Regarding the effect of temperature, the ohmic resistance of MEA becomes lower as the temperature elevates from 140 to 180 °C, but increases at 200 °C. The maximum peak power density presents at 180 °C and 20% RH with 454 mW cm(−2). The peak power density is favored with temperature increase from 140 to 180 °C, but decreases with further increase to 200 °C. Moreover, when dry gas conditions are employed, the output performance is unstable, suggesting that humidification is necessary to inhibit degradation for a long-term stability test. MDPI 2022-07-23 /pmc/articles/PMC9331839/ /pubmed/35893446 http://dx.doi.org/10.3390/membranes12080728 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Yifan
Hu, Jing
Papavasiliou, Joan
Fu, Zhiyong
Chen, Li
Li, Haibin
Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title_full Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title_fullStr Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title_full_unstemmed Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title_short Enhanced MEA Performance for an Intermediate-Temperature Fuel Cell with a KH(5)(PO(4))(2)-Doped Polybenzimidazole Membrane
title_sort enhanced mea performance for an intermediate-temperature fuel cell with a kh(5)(po(4))(2)-doped polybenzimidazole membrane
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9331839/
https://www.ncbi.nlm.nih.gov/pubmed/35893446
http://dx.doi.org/10.3390/membranes12080728
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