Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion® Ionomer

Perfluorinated sulfonic acid (PFSA) polymers such as Nafion® are widely used for both electrolyte membranes and ionomers in the catalytic layer of membrane-electrode assemblies (MEAs) because of their high protonic conductivity, σH, as well as chemical a...

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Autores principales:	Irene Gatto, Ada Saccà, David Sebastián, Vincenzo Baglio, Antonino Salvatore Aricò, Claudio Oldani, Luca Merlo, Alessandra Carbone
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Aquivion<sup>®</sup> short side chain dispersing agent in catalytic ink ionomer optimization automotive applications PEFC Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/0829995fb8394e31aca0d411b0f293ce
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spelling	oai:doaj.org-article:0829995fb8394e31aca0d411b0f293ce2021-11-11T18:48:33ZInfluence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer10.3390/polym132138322073-4360https://doaj.org/article/0829995fb8394e31aca0d411b0f293ce2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3832https://doaj.org/toc/2073-4360Perfluorinated sulfonic acid (PFSA) polymers such as Nafion<sup>®</sup> are widely used for both electrolyte membranes and ionomers in the catalytic layer of membrane-electrode assemblies (MEAs) because of their high protonic conductivity, σ<sub>H</sub>, as well as chemical and thermal stability. The use of PFSA polymers with shorter side chains and lower equivalent weight (EW) than Nafion<sup>®</sup>, such as Aquivion<sup>®</sup> PFSA ionomers, is a valid approach to improve fuel cell performance and stability under drastic operative conditions such as those related to automotive applications. In this context, it is necessary to optimize the composition of the catalytic ink, according to the different ionomer characteristics. In this work, the influence of the ionomer amount in the catalytic layer was studied, considering the dispersing agent used to prepare the electrode (water or ethanol). Electrochemical studies were carried out in a single cell in the presence of H<sub>2</sub>-air, at intermediate temperatures (80–95 °C), low pressure, and reduced humidity ((50% RH). %). The best fuel cell performance was found for 26 wt.% Aquivion<sup>®</sup> at the electrodes using ethanol for the ink preparation, associated to a maximum catalyst utilization.Irene GattoAda SaccàDavid SebastiánVincenzo BaglioAntonino Salvatore AricòClaudio OldaniLuca MerloAlessandra CarboneMDPI AGarticleAquivion<sup>®</sup>short side chaindispersing agent in catalytic inkionomer optimizationautomotive applicationsPEFCOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3832, p 3832 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquivion<sup>®</sup> short side chain dispersing agent in catalytic ink ionomer optimization automotive applications PEFC Organic chemistry QD241-441
spellingShingle	Aquivion<sup>®</sup> short side chain dispersing agent in catalytic ink ionomer optimization automotive applications PEFC Organic chemistry QD241-441 Irene Gatto Ada Saccà David Sebastián Vincenzo Baglio Antonino Salvatore Aricò Claudio Oldani Luca Merlo Alessandra Carbone Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
description	Perfluorinated sulfonic acid (PFSA) polymers such as Nafion<sup>®</sup> are widely used for both electrolyte membranes and ionomers in the catalytic layer of membrane-electrode assemblies (MEAs) because of their high protonic conductivity, σ<sub>H</sub>, as well as chemical and thermal stability. The use of PFSA polymers with shorter side chains and lower equivalent weight (EW) than Nafion<sup>®</sup>, such as Aquivion<sup>®</sup> PFSA ionomers, is a valid approach to improve fuel cell performance and stability under drastic operative conditions such as those related to automotive applications. In this context, it is necessary to optimize the composition of the catalytic ink, according to the different ionomer characteristics. In this work, the influence of the ionomer amount in the catalytic layer was studied, considering the dispersing agent used to prepare the electrode (water or ethanol). Electrochemical studies were carried out in a single cell in the presence of H<sub>2</sub>-air, at intermediate temperatures (80–95 °C), low pressure, and reduced humidity ((50% RH). %). The best fuel cell performance was found for 26 wt.% Aquivion<sup>®</sup> at the electrodes using ethanol for the ink preparation, associated to a maximum catalyst utilization.
format	article
author	Irene Gatto Ada Saccà David Sebastián Vincenzo Baglio Antonino Salvatore Aricò Claudio Oldani Luca Merlo Alessandra Carbone
author_facet	Irene Gatto Ada Saccà David Sebastián Vincenzo Baglio Antonino Salvatore Aricò Claudio Oldani Luca Merlo Alessandra Carbone
author_sort	Irene Gatto
title	Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
title_short	Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
title_full	Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
title_fullStr	Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
title_full_unstemmed	Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer
title_sort	influence of ionomer content in the catalytic layer of meas based on aquivion<sup>®</sup> ionomer
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0829995fb8394e31aca0d411b0f293ce
work_keys_str_mv	AT irenegatto influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT adasacca influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT davidsebastian influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT vincenzobaglio influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT antoninosalvatorearico influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT claudiooldani influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT lucamerlo influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer AT alessandracarbone influenceofionomercontentinthecatalyticlayerofmeasbasedonaquivionsupsupionomer
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Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion<sup>®</sup> Ionomer

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