{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Guo L"],"funding":["Ministry of Education, Culture, Sports, Science and Technology","Japan Society for the Promotion of Science"],"pagination":["e09467"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12499463"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["12(37)"],"pubmed_abstract":["Phosphoric acid (PA)-doped proton exchange membranes (PEMs) face significant challenges owing to the loss of PA, particularly under high humidity conditions. Ion-pair interactions between PA and quaternary ammonium (QA) groups can effectively mitigate PA loss. Herein, polyphenylene-based quaternized membranes (BAF-QAF and C7-QAF) comprising distinct hydrophobic moieties [BAF = (perfluoropropane-2,2-diyl)dibenzene and C7 = 1,1-diphenylcycloheptane] and fluorenyl groups with pendant QA head groups are designed and used as PA-doped PEMs with low or no fluorine contents to realize high-temperature and low-humidity operability. The resulting membranes exhibited excellent PA retention, maintaining >85% of their initial proton conductivities at 90% relative humidity after 10 humidity cycles. PA-doped membranes PA-C7-QAF and PA-BAF-QAF exhibit superior proton conductivities of 60.3 and 58.4 mS cm<sup>-1</sup> at 160 °C, respectively. PA-C7-QAF and PA-BAF-QAF fuel cells deliver peak power densities of 0.579 and 0.537 W cm<sup>-2</sup> at 140 °C and 0.706 and 0.640 W cm<sup>-2</sup> at 160 °C, respectively, under dehumidified conditions. The PA-C7-QAF cell also exhibits impressive durability with an average voltage decay of 30 µV h<sup>-1</sup> (140 °C, 0.15 A cm<sup>-2</sup>) after an initial voltage drop. These findings underscore PA-C7-QAF and PA-BAF-QAF membranes as promising components in high-temperature fuel cells."],"journal":["Advanced science (Weinheim, Baden-Wurttemberg, Germany)"],"pubmed_title":["Ion-Pair Interactions in Polyphenylene-Based Quaternized Membranes Designed for Phosphoric Acid-Doped Proton Exchange Membranes for High-Temperature Fuel Cells."],"pmcid":["PMC12499463"],"funding_grant_id":["JPMXP1122712807","23H02058"],"pubmed_authors":["Guo L","Wang S","Miyatake K","Yadav V","Hao X","Xian F","Mahmoud AMA","Meng Y","Liu F"],"additional_accession":[]},"is_claimable":false,"name":"Ion-Pair Interactions in Polyphenylene-Based Quaternized Membranes Designed for Phosphoric Acid-Doped Proton Exchange Membranes for High-Temperature Fuel Cells.","description":"Phosphoric acid (PA)-doped proton exchange membranes (PEMs) face significant challenges owing to the loss of PA, particularly under high humidity conditions. Ion-pair interactions between PA and quaternary ammonium (QA) groups can effectively mitigate PA loss. Herein, polyphenylene-based quaternized membranes (BAF-QAF and C7-QAF) comprising distinct hydrophobic moieties [BAF = (perfluoropropane-2,2-diyl)dibenzene and C7 = 1,1-diphenylcycloheptane] and fluorenyl groups with pendant QA head groups are designed and used as PA-doped PEMs with low or no fluorine contents to realize high-temperature and low-humidity operability. The resulting membranes exhibited excellent PA retention, maintaining >85% of their initial proton conductivities at 90% relative humidity after 10 humidity cycles. PA-doped membranes PA-C7-QAF and PA-BAF-QAF exhibit superior proton conductivities of 60.3 and 58.4 mS cm<sup>-1</sup> at 160 °C, respectively. PA-C7-QAF and PA-BAF-QAF fuel cells deliver peak power densities of 0.579 and 0.537 W cm<sup>-2</sup> at 140 °C and 0.706 and 0.640 W cm<sup>-2</sup> at 160 °C, respectively, under dehumidified conditions. The PA-C7-QAF cell also exhibits impressive durability with an average voltage decay of 30 µV h<sup>-1</sup> (140 °C, 0.15 A cm<sup>-2</sup>) after an initial voltage drop. These findings underscore PA-C7-QAF and PA-BAF-QAF membranes as promising components in high-temperature fuel cells.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Oct","modification":"2026-06-04T04:43:41.626Z","creation":"2026-05-05T03:12:23.042Z"},"accession":"S-EPMC12499463","cross_references":{"pubmed":["40605498"],"doi":["10.1002/advs.202509467"]}}