文献类型：期刊文献

英文题名：Ionic crosslinking-induced nanochannels with fast proton-selective conduction in flow battery membrane

作者：Su, Jingwen[1];Lin, Yuqing[1,2];Gan, Ning[1];Qiu, Yulong[1];Wu, Baolong[1];Sun, Haopan[1];Chen, Shuhang[1];Li, Xin[1];Yu, Jianguo[1];Yoshioka, Tomohisa[2];Matsuyama, Hideto[2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe, Japan

年份：2026

卷号：72

期号：2

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20254319384639);WOS:【SCI-EXPANDED(收录号:WOS:001598401400001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 22208095; Intergovernmental Cooperation of Science and Technology Program of Shanghai, Grant/Award Number: 22520710800; Kobe University Strategic International Collaborative Research Grant (Type B Fostering Joint Research); JSPS Grant-in-Aid for Research Activity Start-up, Grant/Award Number: 25K23530

语种：英文

外文关键词：ion selectivity; ionic crosslinking; nanochannel; proton transport; vanadium flow battery

摘要：Charge-governed ion transport is a critical mechanism in various industries, particularly in energy conversion and storage applications. Drawing inspiration from this, a novel ion-conductive membrane (ICM) was developed through ionic crosslinking of sulfonated poly(arylene ether ketone) (SPEEK) and polybenzimidazole (PBI) to fully harness ionic-charge effects for enhanced performance in vanadium redox flow batteries. The ionic crosslinking induces nanophase separation, leading to the aggregation of ion pathways with ionic-charge effects, which significantly enhances proton/vanadium ion selectivity and facilitates efficient proton transport (36.5 mScm-1) via the Grotthuss mechanism. The optimized ICM demonstrates simultaneous improvements in battery performance with enhanced energy efficiency (EE: 91.1%-82.8% at 40-200 mAcm-2), while exhibiting excellent long-term stability for 1000 cycles over 500 h (EE: 78.9% at 120 mAcm-2). This study highlights the potential of ionic crosslinking-induced angstrom-scale channels with tailored functionalities, thereby advancing the applications of ICMs in rapid energy conversion, energy storage devices, and beyond.