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High-temperature PEM fuel cell electrode catalyst layers Part 2: Experimental validation of its effective transport properties.

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Title: High-temperature PEM fuel cell electrode catalyst layers Part 2: Experimental validation of its effective transport properties.
Authors: Prokop, M.1 (AUTHOR) prokopm@vscht.cz, Capek, P.2 (AUTHOR), Vesely, M.2 (AUTHOR), Paidar, M.1 (AUTHOR), Bouzek, K.1 (AUTHOR)
Source: Electrochimica Acta. May2022, Vol. 413, pN.PAG-N.PAG. 1p.
Subjects: Fuel cell electrodes, Proton exchange membrane fuel cells, Catalysts, Electric conductivity, Fuel cells, Heat treatment
Abstract: • Setups for electrical conductivity transport properties of catalyst layer implemented. • Numerical analysis of FIB-SEM tomography images corresponds to the experiments. • Electrical conductivity of catalyst layer improved by heat treatment. • Transfer properties of catalyst layer less affected by heat treatment. In this study, the experimental approach for determination of high-temperature PEM fuel cell, PBI-bonded catalyst layer conductivity and transfer properties was developed and optimised. Electrical conductivity was determined by chronopotentiometry combined with mathematical model, using uncompressed catalyst layer on a conductive glass support. Effective transport properties were determined using gas-diffusion electrode samples fixed in the Wicke-Kallenbach cell. Experimental results were compared with quantities calculated from FIB-SEM tomography. Very good agreement between the results was reached. Theoretical data evaluated on the base of tomography may thus be considered as validated. The results confirm the heat treatment of the catalyst layer to lead to its reorganisation to less porous and better-defined structure with improved electrical conductivity. Changes in effective transport properties, however, were not pronounced. This is due to the nature of gas-diffusion electrode samples. Determined electrical conductivities and transfer properties of catalyst layer underlined the importance of gas-diffusion electrode preparation procedure. This represents an important input for further studies, focused on optimisation of membrane-electrode assemblies for HT PEM FC. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 155886544
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  Data: High-temperature PEM fuel cell electrode catalyst layers Part 2: Experimental validation of its effective transport properties.
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  Data: <searchLink fieldCode="AR" term="%22Prokop%2C+M%2E%22">Prokop, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> prokopm@vscht.cz</i><br /><searchLink fieldCode="AR" term="%22Capek%2C+P%2E%22">Capek, P.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vesely%2C+M%2E%22">Vesely, M.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Paidar%2C+M%2E%22">Paidar, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bouzek%2C+K%2E%22">Bouzek, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. May2022, Vol. 413, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Fuel+cell+electrodes%22">Fuel cell electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Proton+exchange+membrane+fuel+cells%22">Proton exchange membrane fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Fuel+cells%22">Fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Setups for electrical conductivity transport properties of catalyst layer implemented. • Numerical analysis of FIB-SEM tomography images corresponds to the experiments. • Electrical conductivity of catalyst layer improved by heat treatment. • Transfer properties of catalyst layer less affected by heat treatment. In this study, the experimental approach for determination of high-temperature PEM fuel cell, PBI-bonded catalyst layer conductivity and transfer properties was developed and optimised. Electrical conductivity was determined by chronopotentiometry combined with mathematical model, using uncompressed catalyst layer on a conductive glass support. Effective transport properties were determined using gas-diffusion electrode samples fixed in the Wicke-Kallenbach cell. Experimental results were compared with quantities calculated from FIB-SEM tomography. Very good agreement between the results was reached. Theoretical data evaluated on the base of tomography may thus be considered as validated. The results confirm the heat treatment of the catalyst layer to lead to its reorganisation to less porous and better-defined structure with improved electrical conductivity. Changes in effective transport properties, however, were not pronounced. This is due to the nature of gas-diffusion electrode samples. Determined electrical conductivities and transfer properties of catalyst layer underlined the importance of gas-diffusion electrode preparation procedure. This represents an important input for further studies, focused on optimisation of membrane-electrode assemblies for HT PEM FC. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.electacta.2022.140121
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      – Code: eng
        Text: English
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        PageCount: 1
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      – SubjectFull: Fuel cell electrodes
        Type: general
      – SubjectFull: Proton exchange membrane fuel cells
        Type: general
      – SubjectFull: Catalysts
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      – SubjectFull: Electric conductivity
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      – SubjectFull: Fuel cells
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      – SubjectFull: Heat treatment
        Type: general
    Titles:
      – TitleFull: High-temperature PEM fuel cell electrode catalyst layers Part 2: Experimental validation of its effective transport properties.
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            – D: 01
              M: 05
              Text: May2022
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              Y: 2022
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              Value: 413
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