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June 20, 2026Advanced Energy Materials1 citations

Main‐Chain Ion‐Pair Polybenzimidazole Membranes Enabling Reduced‐Temperature HT‐PEMFC Operation (Down to 120°C) (Adv. Energy Mater. 23/2026)

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HLHuina LinBBBrian C. Benicewicz

Key Points

  • This research aims to enhance the performance of proton exchange membrane fuel cells by optimizing membrane properties.
  • Developed polybenzimidazole membranes with imidazolium-biphosphate ion-pair motifs.
  • Evaluated the membranes under varying operating conditions.
  • Measured conductivity and durability specifically at reduced temperatures down to 120 °C.
  • Membranes exhibited high conductivity, supporting robust fuel cell operation at 120 °C.
  • Cooperative ion-pair and hydrogen-bond networks significantly reduced acid loss and phosphate mobility.
  • Durability testing demonstrated effective performance across a wide range of conditions.

Abstract

Proton Exchange Membrane Fuel Cells Embedding imidazolium–biphosphate ion-pair motifs directly within the polybenzimidazole backbone locks in phosphoric acid and maintains interconnected proton-conduction channels. Cooperative ion-pair and hydrogen-bond networks reduce phosphate mobility and mitigate acid loss while sustaining high conductivity. The resulting membrane supports robust HT-PEMFC durability across wide operating conditions, including efficient operation at reduced temperatures (to 120 °C). More in article number e70811, Huina Lin and Brian C. Benicewicz.

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Cite This Study

Lin et al. (2026) studied this question.

synapsesocial.com/papers/6a363224db0793dc1a538c85https://doi.org/10.1002/aenm.70998
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  1. 1Main‐Chain Ion‐Pair Polybenzimidazole Membranes Enabling Reduced‐Temperature HT‐PEMFC Operation (Down to 120°C)2026 · 2 citations
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  4. 4Synergistic Hydrogen‐Bonding and Covalent Crosslinking in Polybenzimidazole Membranes for Wide‐Temperature Anhydrous Fuel Cells2026 · 4 citations
  5. 5Gel‐State Polyelectrolyte With Quaternized Hierarchical Channels Enables Subzero‐Operable and High‐Power PEMFCs From –20 to 240°C2026