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We have developed a polymer electrolyte membrane using polyphenylsulfone (PPSU) as a hydrocarbon-based polymer as a non-fluorinated electrolyte membrane . A hydrocarbon-based polymer electrolyte ionomer was synthesized by sulfonating PPSU polymer at different temperatures and times to obtain an ionomer with high ion exchange capacity (IEC=3.5 meq/g, DS=2). The SPPSU electrolyte membrane was prepared by dissolving the SPPSU ionomer in an organic solvent, casting it on a glass plate at 60 °C using a coater device, and obtaining a crosslinked SPPSU (CSPPSU) membrane by a thermal process up to 250 °C in an oven. The final membrane was obtained by an activation process in an alkaline and acid aqueous solution (wet process) to remove remaining impurities in the crosslinked membrane. The physical and chemical properties of the obtained SPPSU ionomer and CSPPSU membrane were evaluated. In addition, an membrane electrode assembly (MEA) was produced using a CSPPSU membrane and a fuel cell evaluation was performed. These results allowed us to optimize the sulfonation and crosslinking conditions of the PPSU polymer.

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Keyword: Sulfonated polyphenylsulfone (SPPSU) ionomer, Crosslinked SPPSU membrane, Polymer electrolyte membrane fuel cells (PEFCs), Polymer electrolyte membrane water electrolysis (PEMWES)

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Conference: 249th Electrochemical Society Meeting (2026-05-24 - 2026-05-28)

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Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6319

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Updated at: 2026-06-02 11:51:57 +0900

Published on MDR: 2026-06-02 14:41:04 +0900