芳烯
流动电池
钒
Nafion公司
法拉第效率
膜
氧化还原
高分子化学
化学
电化学
渗透
离子交换
离子电导率
化学工程
材料科学
电极
无机化学
有机化学
离子
芳基
物理化学
工程类
电解质
生物化学
烷基
作者
Amirreza Khataee,Hannes Nederstedt,Patric Jannasch,Rakel Wreland Lindström
标识
DOI:10.1016/j.memsci.2023.121390
摘要
With the aim to develop vanadium redox flow battery (VRFB) membranes beyond state of the art, we have in the present work functionalized poly(p-terphenylene)s with highly acidic perfluorosulfonic groups and investigated their performance as proton exchange membranes (PEMs). Consequently, two poly(p-terphenylene alkylene)s tethered with perfluoroalkylsulfonic acid and perfluorophenylsulfonic acid, respectively, were synthesized through superacid-mediated polyhydroxyalkylations and cast into PEMs. Compared with Nafion 212, the PEM carrying perfluorophenylsulfonic acid groups (PTPF-Phenyl-SA) was found to exhibit higher ionic conductivity and eight times lower vanadium (IV) permeation rate. The latter explains the longer self-discharge duration of the VRFB based on the PTPF-Phenyl-SA. In addition, the VRFB assembled with the PTPF-Phenyl-SA PEM exhibited a high average coulombic efficiency of 99.6% for over 100 cycles with a capacity fade of 0.24% per cycle, which was 50% lower than when Nafion 212 was used. More importantly, excellent capacity retention was achieved through electrochemical rate performance experiments at different current densities.
科研通智能强力驱动
Strongly Powered by AbleSci AI