化工学报2025，Vol.76Issue(5)：2294-2303,10.DOI:10.11949/0438-1157.20241217
全钒液流电池用纤维素纳米晶掺杂混合基质膜
Cellulose nanocrystals-doped hybrid matrix membranes for vanadium flow battery
摘要
Abstract
A cellulose nanocrystal(CNC)-doped sulfonated poly(ether ether ketone)(SPEEK)hybrid matrix membrane was designed for vanadium redox flow batteries.The abundant hydroxyl and sulfonic acid groups on the surface of CNC enhances its hydrophilicity and improves filler-polymer interfacial compatibility.Additionally,the high crystallinity and aspect ratio of CNC provide the membrane with high stability and effective ion barrier properties under harsh acidic and oxidative conditions.The abundant—OH groups on the CNC surface,combined with the—SO3 H groups in SPEEK,created interconnected hydrophilic ion nanoclusters,resulting in excellent proton conductivity of 0.073 S·cm-1.The assembled battery using this membrane achieves a voltage efficiency(VE)of 88.7%at 120 mA·cm-2,significantly surpassing that of the SPEEK membrane(78.3%),indicating that SPEEK/CNC membrane has good application prospects in all-vanadium liquid flow batteries.关键词
全钒液流电池/混合基质膜/纤维素纳米晶Key words
vanadium redox flow battery/hybrid matrix membrane/cellulose nanocrystal分类
动力与电气工程引用本文复制引用
刘鑫,郑皓仁,陈强,丁静怡,黄康,徐至..全钒液流电池用纤维素纳米晶掺杂混合基质膜[J].化工学报,2025,76(5):2294-2303,10.基金项目
国家自然科学基金项目(22278211,22075076) （22278211,22075076）
