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Cited by 19Fuel Cells and Related MaterialsElectrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel Cells

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

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Gatto, Irene, Saccà, Ada, Sebastián, David, Baglio, Vincenzo, Aricò, Antonino Salvatore, Oldani, Claudio, Merlo, Luca, Carbone, Alessandra·2021·Polymers
DOI 10.3390/polym13213832PMC PMC8587568
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Abstract

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 and thermal stability. The use of PFSA polymers with shorter side chains and lower equivalent weight (EW) than Nafion®, such as Aquivion® 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 H2-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® at the electrodes using ethanol for the ink preparation, associated to a maximum catalyst utilization.

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  • The membrane electrode assembly with a moderate ionomer content of about 26 wt.% shows the highest performance in electrokinetic parameters such as ECSA, suggesting balanced electronic and ionic percolation within the catalyst layer.

    “The MEA with a moderate ionomer content of ~ 26 wt.% (wt.% means the weight percentage) shows the highest performance in terms of electrokinetic parameters, such as ECSA, suggesting balanced electronic and ionic percolation within the catalyst layer [181].”

    From Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly (2023) · cites this paper as [181]

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Metadata

Authors
Gatto, I., Saccà, A., Sebastián, D., Baglio, V., Aricò, A. S., Oldani, C., Merlo, L., & Carbone, A.
Affiliations
  • Institute for Advanced Energy Technologies (IT)
  • Consejo Superior de Investigaciones Científicas (ES)
  • Solvay (Italy) (IT)
Corresponding author
Gatto, Irene
ORCID
Venue
Polymers
Publisher
MDPI AG
Published
2021-11-05
Volume
13
Issue
21
Pages
3832
ISSN
2073-4360 (ISSN-L)
DOI
10.3390/polym13213832
PMC
PMC8587568
OpenAlex
W3212060313
Cited by
19
References
2
Citations by year
2026: 5 · 2025: 5 · 2024: 3 · 2023: 6
FWCI
0.66
Type
journal article
Language
en
Open access
Licence
Locations
  • Polymers (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
European Union (303452)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
Keywords
membrane electrode assembly, perfluorinated sulfonic acid ionomers, ionomer content, catalyst layer, fuel cell performance, catalyst utilization, Nafion, proton conductivity, low humidity operation, intermediate-temperature fuel cells

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