文献类型：期刊文献

英文题名：Charge-enhanced porous graphene oxide nanosheets-embedded membrane with improved ion conduction and capacity retention for aqueous organic flow battery

作者：Xu, Kenan[1,3];Lin, Shuhao[1,3];Liu, Xin[1,3];Zhang, Dezhu[3];Yu, Ying[1];Wei, Jie[3];Li, Feng[2];Wang, Yixing[3];Huang, Kang[1,3];Xu, Zhi[2]

机构：[1]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Suzhou Lab, Suzhou 215125, Peoples R China

年份：2026

卷号：8

外文期刊名：ADVANCED MEMBRANES

收录：EI(收录号：20261020239182);WOS:【ESCI(收录号:WOS:001724364500001)】；

基金：This work is supported by National Natural Science Foundation of China (Grant Nos. 22278211 and 22425802), the Natural Science Foundation of Jiangsu Province, China (BK20240402 and BK20240401) and the State Key Laboratory of Materials-Oriented Chemical Engineering, China (Nos. SKL-MCE-23A01). Thanks to Scientific Compass (www.shiyanjia.com) for AFM analysis.

语种：英文

外文关键词：Charge-enhanced porous graphene oxide; Fast ion-selective transport; Ion conductive membrane; Aqueous organic flow battery; Enhanced capacity retention

摘要：Aqueous organic flow battery (AOFB), a promising energy storage technology, owned low self-discharge rate, cost-effective merit and non-dependence on metal resources. However, membranes with high ion-selective transport are urgently required to alleviate capacity degradation of AOFBs. Herein, charge-enhanced porous graphene oxide (CPGO) nanosheets were created by ultrasonic-assisted acid etching and embedded in polymer membrane to realize fast ion-selective transport by multiple ion channel construction and electrostatic repulsion synergistic strategy. Acid etching exposed more oxygen-containing groups on the porous surface, facilitating uniform dispersion of CPGO and connectivity of pore-assisted ion channels and interfacial water-bridged ion channel. Furthermore, carboxyl groups on CPGO in alkaline electrolyte also provided transfer sites for K+ transport. On the other hand, the stronger interfacial interaction further effectively reduced ion cluster dimension, leading to a 2.1-fold enhancement in ion selectivity. As a consequence, the optimized membrane endowed the AOFB with excellent coulombic efficiencies of 98.9-99.9% and high voltage efficiencies of 94.8-77.9% at 20-100 mA cm(-2). Notably, the AOFB still keep more than 99% capacity for 1000 cycles (0.0002% capacity decay per cycle), which is greatly superior to that of pure polymer membrane (0.02% capacity decay per cycle).