Wenheng Huang, Jun Liu, Jun Long, Wenjie Xu, Xiujuan Qi, Jinchao Li*, Yaping Zhang*, Study on degradation mechanism of fluorine-containing branched sulfonated polyimide membrane for vanadium flow battery by density functional theory and ex situ experiments. Journal of Materials Science 2022, DOI: 10.1007/s10853-022-07783-8