Highly stable side-chain-type cardo poly(aryl ether ketone)s membranes for vanadium flow battery  

作　　者：Ziming Zhao Qing Dai Sihan Huang Wenjing Lu Yaohan Chen Jifu Zheng Suobo Zhang Shenghai Li Xianfeng Li 

机构地区：[1]Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China [3]Division of Energy Storage,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

出　　处：《Chinese Chemical Letters》2024年第3期167-170,共4页中国化学快报（英文版）

基　　金：the financial support of the National Natural Science Foundation of China(Nos.22075276,U19A2016,U22B6012);CAS Strategic Leading Science&Technology Program(A)(No.XDA21070000);Dalian High Level Talent Innovation Support Program(No.2020RD05);the Development of Scientic and Technological Project of the Jilin Province(No.20210101126JC);International Partnership Program of Chinese Academy of Sciences(No.121421KYSB20210028)。

摘　　要：Vanadium flow batteries(VFBs)have drawn considerable attention as an emerging technology for largescale energy storage systems(ESSs).One of the pivotal challenges is the availability of eligible ion exchange 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(0.058Ωcm^(2)),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 bearing pendent alkyl chain terminated with quaternary ammonium(Q-PPhEK)demonstrated an energy efficiency above 80%over 700 cycles at 160 mA/cm^(2).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.

关 键 词：Vanadium flow battery Energy storage technology Ion exchange membrane Ion transport mechanism Poly(arylene ether ketone)s(PAEKs) 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]