文献类型：期刊文献

中文题名：全钒液流电池用纤维素纳米晶掺杂混合基质膜

英文题名：Cellulose nanocrystals-doped hybrid matrix membranes for vanadium flow battery

作者：刘鑫[1,3];郑皓仁[1,3];陈强[1];丁静怡[3];黄康[1,3];徐至[2]

机构：[1]南京工业大学化工学院,江苏南京211816;[2]华东理工大学化工学院化学工程联合国家重点实验室,上海200237;[3]苏州实验室,江苏苏州215125

年份：2025

卷号：76

期号：5

起止页码：2294

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：;EI(收录号：20252818748996);北大核心:【北大核心2023】；

基金：国家自然科学基金项目(22278211,22075076)。

语种：中文

中文关键词：全钒液流电池;混合基质膜;纤维素纳米晶

外文关键词：vanadium redox flow battery;hybrid matrix membrane;cellulose nanocrystal

摘要：设计了用于全钒液流电池的纤维素纳米晶(CNC)掺杂的磺化聚醚醚酮(SPEEK)混合基质膜,CNC表面大量的羟基和磺酸基团使其具有良好的亲水性,这些基团的存在也能改善填料和聚合物之间的界面相容性。此外,CNC的高结晶度和高纵横比确保了膜在强酸性和强氧化性条件下高的稳定性以及良好的活性离子阻隔能力。同时其表面丰富的—OH基团与水分子以及SPEEK中丰富的—SO_(3)H基团构建了高度互连的亲水离子纳米团簇,实现高达0.073 S·cm^(-1)的质子传导率。使用其组装的电池在120 mA·cm^(-2)的电流密度下电压效率(VE)可达88.7%,远远超过SPEEK膜(78.3%),表明SPEEK/CNC膜在全钒液流电池中具有良好的应用前景。
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—SO_(3)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.