title: High anhydrous proton conductivity of imidazole-loaded mesoporous polyimides over a wide range from subzero to moderate temperature.
abstract: On-board fuel cell technology requires proton conducting materials with high conductivity not only at intermediate temperatures for work but also at room temperature and even at subzero temperature for startup when exposed to the colder climate. To develop such materials is still challenging because many promising candidates for the proton transport on the basis of extended microstructures of water molecules suffer from significant damage by heat at temperatures above 80 °C or by freeze below -5 °C. Here we show imidazole loaded tetrahedral polyimides with mesopores and good stability (Im@Td-PNDI 1 and Im@Td-PPI 2) exhibiting a high anhydrous proton conductivity over a wide temperature range from -40 to 90 °C. Among all anhydrous proton conductors, the conductivity of 2 is the highest at temperatures below 40 °C and comparable with the best materials, His@[Al(OH)(1,4-ndc)]n and [Zn3(H2PO4)6(H2O)3](Hbim), above 40 °C.
authors.affiliation: College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Polymer Materials, Fujian Normal University , 32 Shangsan Road, Fuzhou 350007, China.
authors.forename: Yingxiang
authors.initials: Y
authors.lastname: Ye
authors.forename: Liuqin
authors.initials: L
authors.lastname: Zhang
authors.forename: Qinfang
authors.initials: Q
authors.lastname: Peng
authors.forename: Guan-E
authors.initials: GE
authors.lastname: Wang
authors.forename: Yangcan
authors.initials: Y
authors.lastname: Shen
authors.forename: Ziyin
authors.initials: Z
authors.lastname: Li
authors.forename: Lihua
authors.initials: L
authors.lastname: Wang
authors.forename: Xiuling
authors.initials: X
authors.lastname: Ma
authors.forename: Qian-Huo
authors.initials: QH
authors.lastname: Chen
authors.forename: Zhangjing
authors.initials: Z
authors.lastname: Zhang
authors.forename: Shengchang
authors.initials: S
authors.lastname: Xiang