Abstract
Vanadium flow batteries(VFBs)have drawn considerable attention as an emerging technology for large-scale energy storage systems(ESSs).One of the pivotal challenges is the availability of eligible ion ex-change membranes(ICMs)that provide high ion selectivity,proton conductivity,and stability under rigorous condition.Herein,a'side-chain-type'strategy has been employed to fabricate highly stable phenolphthalein-based cardo poly(arylene ether ketone)s(PAEKs)membrane with low area resistance(0.058 Ω cm2),in which flexible alkyl spacers effectively alleviated inductive withdrawing effect from terminal ion exchange groups thus enabling a stable backbone.The assembled VFBs based on PAEKs bear-ing pendent alkyl chain terminated with quaternary ammonium(Q-PPhEK)demonstrated an energy effi-ciency above 80％over 700 cycles at 160mA/cm2.Such a remarkable results revealed that the side-chain-type strategy contributed to enhancing the ICMs stability in strong oxidizing environment,meanwhile,more interesting backbones would be woken with this design engaging in stable ICMs for VFBs.
基金项目
国家自然科学基金(22075276)
国家自然科学基金(U19A2016)
国家自然科学基金(U22B6012)
CAS Strategic Leading Science and Technology Program(A)(XDA21070000)
Dalian High Level Talent Innovation Support Program(2020RD05)
Development of Scientic and Technological Project of the Jilin Province(20210101126JC)
International Partnership Program of Chinese Academy of Sciences(121421KYSB20210028)
NETL
NSTL
万方数据