title: Comb-Like Poly(Ether-Sulfone) Membranes Derived from Planar 6,12-Diaryl-5,11-Dihydroindolo[3,2-b]Carbazole Monomer for Alkaline Fuel Cells.
abstract: Highly conductive anion exchange membranes (AEMs), along with the ability to suppress swelling, are critical but challenging requirements for alkaline fuel cell applications. To achieve this criterion, a series of poly(ether sulfone)s (PESFs) with flexible alkyl imidazolium pendants attached directly on large planar 6,12-bis(4-hydroxyphenyl)-5,11-dihydroindolo[3,2-b]carbazole (DCP) units is reported. The planar DCP units stabilize the hydrophobic phase through strong π-π interactions and also facilitate the formation of ionic conducting channels through self assembly of hydrophilic pendants. The AEM prepared here, based on rational design, has a relatively low ion exchange capacity (IEC) of 1.86 × 10-3mol g-1and exhibits high hydroxide ion (OH-) conductivity of 101 × 10-3S cm-1, a low swelling ratio of 9.3% and a water uptake of 39.6%. Furthermore, the AEMs reported in this paper have excellent stability in 1 m NaOH solution at 80 °C over 500 h. Therefore, the synthesized polymers offer a new insight into the design of high performance materials for AEMs.
authors.affiliation: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
authors.forename: Peipei
authors.initials: P
authors.lastname: Zuo
authors.affiliation: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
authors.forename: Yumiao
authors.initials: Y
authors.lastname: Su
authors.affiliation: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China. liwm@fjirsm.ac.cn.
authors.forename: Wenmu
authors.initials: W
authors.lastname: Li
mesh_terms: D000468:Alkalies / Q000737:chemistry*; D002227:Carbazoles / Q000737:chemistry*; D011211:Electric Power Supplies; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013450:Sulfones / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000468:Alkalies; D002227:Carbazoles; D011108:Polymers; D013450:Sulfones; C022840:polyether sulfone
keywords: anion exchange membranes; comb-like; high alkaline stability; imidazolium; low water uptake