Beyond Nafion with Fluorine-Free sPSU-sNIM Membranes: Nanostructured Proton Pathways for Harsh Fuel Cell Environments.

Cataldo Simari, Ernestino Lufrano, Luigi Coppola, Isabella Nicotera

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Article in ACS applied materials & interfaces, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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4 authors.

Cataldo SimariDepartment of Chemistry and Chemical Technology, University of Calabria, Via P. Bucci, Rende, Cosenza 87036, Italy.ORCID 0000-0002-6154-5456

Ernestino LufranoDepartment of Chemistry and Chemical Technology, University of Calabria, Via P. Bucci, Rende, Cosenza 87036, Italy.

Luigi CoppolaDepartment of Chemistry and Chemical Technology, University of Calabria, Via P. Bucci, Rende, Cosenza 87036, Italy.

Isabella NicoteraDepartment of Chemistry and Chemical Technology, University of Calabria, Via P. Bucci, Rende, Cosenza 87036, Italy.ORCID 0000-0002-4411-0573

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this study, nanocomposite membranes were developed by incorporating sulfonated nanoscale ionic materials (sNIMs) into a sulfonated polysulfone (sPSU) matrix for high-temperature polymer electrolyte membrane fuel cells (PEMFCs), with a focus on direct hydrogen fuel cell (DHFC) applications. The sNIMs, composed of silica nanoparticles functionalized with tethered sulfonic acid groups, were uniformly dispersed within the polymer matrix via solution casting. Structural and electrochemical characterizations demonstrated that the resulting membranes exhibit improved thermal and mechanical stability, enhanced hydration retention, and superior proton conductivity compared to pristine sPSU and recast Nafion. Remarkably, the optimized sNIM-3 formulation achieved 18  mS cm

Indexed as

DHFCfluorine-free membranesGrotthuss mechanismhigh-temperature PEMFClow-humidity operationsulfonated nanoscale ionic materialssulfonated polysulfone

Identifiers

PMID41099305

DOI10.1021/acsami.5c13417

PMCPMC12581127

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