title: A gemini quaternary ammonium poly (ether ether ketone) anion-exchange membrane for alkaline fuel cell: design, synthesis, and properties.
abstract: To reconcile the tradeoff between conductivity and dimensional stability in AEMs, a novel Gemini quaternary ammonium poly (ether ether ketone) (GQ-PEEK) membrane was designed and successfully synthesized by a green three-step procedure that included polycondensation, bromination, and quaternization. Gemini quaternary ammonium cation groups attached to the anti-swelling PEEK backbone improved the ionic conductivity of the membranes while undergoing only moderate swelling. The grafting degree (GD) of the GQ-PEEK significantly affected the properties of the membranes, including their ion-exchange capacity, water uptake, swelling, and ionic conductivity. Our GQ-PEEK membranes exhibited less swelling (≤ 40 % at 25-70 °C, GD 67 %) and greater ionic conductivity (44.8 mS cm(-1) at 75 °C, GD 67 %) compared with single quaternary ammonium poly (ether ether ketone). Enhanced fuel cell performance was achieved when the GQ-PEEK membranes were incorporated into H2 /O2 single cells.
authors.affiliation: Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing 100191 (P.R. China); Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Xueyuan Road No. 37, Haidian District, Beijing 100191 (P.R. China).
authors.forename: Jiangju
authors.initials: J
authors.lastname: Si
authors.forename: Shanfu
authors.initials: S
authors.lastname: Lu
authors.forename: Xin
authors.initials: X
authors.lastname: Xu
authors.forename: Sikan
authors.initials: S
authors.lastname: Peng
authors.forename: Ruijie
authors.initials: R
authors.lastname: Xiu
authors.forename: Yan
authors.initials: Y
authors.lastname: Xiang
mesh_terms: D000468:Alkalies / Q000737:chemistry*; D064751:Ammonium Compounds / Q000737:chemistry*; D000837:Anion Exchange Resins; D007659:Ketones / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission
chemical_list: D000468:Alkalies; D064751:Ammonium Compounds; D000837:Anion Exchange Resins; D007659:Ketones
keywords: Gemini quaternary ammonium grafting pattern; conducting materials; electrochemistry; fuel cell; membranes; poly (ether ether ketone)