Low water swelling polyaromatic proton exchange membranes

Wang, Cong1; Sun, Yujiao1; Yang, Zhaoji1; Fan, Jiantao1,2; Li, Hui1; Xu, Shaoyi1,2

2023-10-15

10.1016/j.memsci.2023.121879

JOURNAL OF MEMBRANE SCIENCE   影响因子和分区

0376-7388

1873-3123

A carbon-carbon linked polyaromatic electrolyte was designed and synthesized for proton exchange membranes. The facile synthesis consists of a metal-free Friedel-Crafts polymerization and a direct post-sulfonation. To prevent the random sulfonation, the trifluorobuanone monomer was incorporated as a spacer to sterically confine the sulfonated area. Hydrophobic/hydrophilic separation was observed in the polymer's microstructure. The membrane (ion exchange capacity = 1.88 mmolg- 1) displayed low water swelling (area swelling = 38.0% at 80 degrees C) at a slightly higher proton conductivity than Nafion 212. Tensile strength of 39.3 MPa and elongation at break of 67.0% were confirmed by stress-strain measurements. The membrane electrode assembly afforded an electrolyzing performance of 4.6 A cm-2@2.0 V while Nafion 212 was 3.6 A cm-2@2.0 V under the same testing conditions. The 45 & mu;m film exhibited better stability than Nafion 212 (-50 & mu;m) both in the preliminary in-situ cyclic accelerated stress test and the 800-h galvanostatic evaluation. The degradation rate of our thin membrane in the 800-h test was comparable to that of Nafion 115 (-125 & mu;m).

Proton exchange membrane Water electrolysis Durability Swelling Friedel-crafts polymerization

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China[2021YFB4000200] ; Foundation Research Project of Shenzhen[JCYJ20190809163611271] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515011917]

Engineering ; Polymer Science

Engineering, Chemical ; Polymer Science

WOS:001031987400001

ELSEVIER

20232614328180

Carbon ; Degradation ; Electrolytes ; Membranes ; Stress-strain curves ; Sulfonation ; Tensile strength

Electric Batteries and Fuel Cells:702 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Polymerization:815.2 ; Materials Science:951

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong, Peoples R China

Wang, Cong,Sun, Yujiao,Yang, Zhaoji,et al. Low water swelling polyaromatic proton exchange membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2023,684.

Wang, Cong,Sun, Yujiao,Yang, Zhaoji,Fan, Jiantao,Li, Hui,&Xu, Shaoyi.(2023).Low water swelling polyaromatic proton exchange membranes.JOURNAL OF MEMBRANE SCIENCE,684.

Wang, Cong,et al."Low water swelling polyaromatic proton exchange membranes".JOURNAL OF MEMBRANE SCIENCE 684(2023).