All‐Hydrocarbon MEA for PEM Water Electrolysis Combining Low Hydrogen Crossover and High Efficiency

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  • Carolin Klose
    Hahn‐Schickard Georges‐Koehler‐Allee 103 79110 Freiburg Germany
  • Torben Saatkamp
    Max‐Planck‐Institut für Festkörperforschung Heisenbergstr. 1 70569 Stuttgart Germany
  • Andreas Münchinger
    Max‐Planck‐Institut für Festkörperforschung Heisenbergstr. 1 70569 Stuttgart Germany
  • Luca Bohn
    Electrochemical Energy Systems IMTEK – Department of Microsystems Engineering University of Freiburg Georges‐Koehler‐Allee 103 79110 Freiburg Germany
  • Giorgi Titvinidze
    Agricultural University of Georgia 240 David Aghmashenebeli Alley 0131 Tbilisi Georgia
  • Matthias Breitwieser
    Hahn‐Schickard Georges‐Koehler‐Allee 103 79110 Freiburg Germany
  • Klaus‐Dieter Kreuer
    Max‐Planck‐Institut für Festkörperforschung Heisenbergstr. 1 70569 Stuttgart Germany
  • Severin Vierrath
    Hahn‐Schickard Georges‐Koehler‐Allee 103 79110 Freiburg Germany

書誌事項

公開日
2020-02-25
権利情報
  • http://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1002/aenm.201903995
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>Hydrocarbon ionomers bear the potential to significantly lower the material cost and increase the efficiency of proton‐exchange membrane water electrolyzers (PEMWE). However, no fully hydrocarbon membrane electrode assembly (MEA) with a performance comparable to Nafion‐MEAs has been reported. PEMWE‐MEAs are presented comprising sPPS as membrane and electrode binder reaching 3.5 A cm<jats:sup>−2</jats:sup> at 1.8 V and thus clearly outperforming state‐of‐the‐art Nafion‐MEAs (N115 as membrane, 1.5 A cm<jats:sup>−2</jats:sup> at 1.8 V) due to a significantly lower high frequency resistance (57 ± 4 mΩ cm² vs 161 ± 7 mΩ cm²). Additionally, pure sPPS‐membranes show a three times lower gas crossover (<0.3 mA cm<jats:sup>−2</jats:sup>) than Nafion N115‐membranes (>1.1 mA cm<jats:sup>−2</jats:sup>) in a fully humidified surrogate test. Furthermore, more than 80 h of continuous operation is shown for sPPS‐MEAs in a preliminary durability test (constant current hold at 1 A cm<jats:sup>−2</jats:sup> at 80 °C). These results rely on the unique transport properties of sulfonated poly(phenylene sulfone) (sPPS) that combines high proton conductivity with low gas crossover.</jats:p>

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