ArticleAngewandte Chemie (International ed. in English)2026
Non-Fluorinated Functional Polyolefin for Puncture-Resistant and Self-Healable Proton Exchange Membranes of Fuel Cells.
Article in Angewandte Chemie (International ed. in English), 2026. 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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Abstract
The development of puncture-resistant and self-healing proton exchange membranes (PEMs) is vital for enhancing fuel cells' (FCs) durability and safety; however, it remains a formidable challenge. Herein, we report a non-fluorinated polyolefin-based PEM that integrates autonomous self-healing, puncture resistance, high gas barrier, and exceptional overall durability in FC applications. The polymers are prepared through rare-earth-catalyzed selective polymerization of isoprene, partial hydrogenation, thiol-ene click chemistry, and oxidation, yielding a sulfonic acid-functionalized polyolefin. The main chain structure of polymers features rigid poly(3-methyl-1-butene) segments-derived from 3,4-polyisoprene units-and soft ethylene-alt-propylene sequences-originating from cis-1,4-polyisoprene units. The nanoscale microphase separation between these hard and soft segments provides exceptional mechanical robustness and self-healing capability, while the aggregation of sulfonic acid groups creates efficient proton transport pathways. The resulting membrane achieves high through-plane proton conductivity of 1.0 × 10
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