文献类型：期刊文献

英文题名：MOF-801 polycrystalline membrane with sub-10 nm polymeric assembly layer for ion sieving and flow battery storage

作者：Cao, Hongyan[1];Xia, Yu[1];Lu, Yuqin[1];Wu, Yulin[2];Xia, Yongsheng[1];Hou, Xiaoxuan[1];Wang, Yixing[2];Liu, Gongping[1];Huang, Kang[1];Xu, Zhi[2]

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

年份：2022

卷号：68

期号：6

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20220911732392);WOS:【SCI-EXPANDED(收录号:WOS:000762257100001)】；

基金：This work appreciated the support from the National Natural Science Foundation of China (Grant Nos. 21908098, 21908054, and 22075076) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

语种：英文

外文关键词：ion sieving; membrane; metal organic framework; vanadium flow battery

摘要：Molecular sieving metal-organic framework (MOF) polycrystalline membranes have great potential for ion sieving and are desirable as efficient separators for devices of energy storage such as flow battery. Herein, we report a continuous MOF-801 polycrystalline membrane with an ultrathin polymeric assembly layer (less than 10 nm) for the vanadium flow battery (VFB). Owing to the precise sub-nanometer sieving pores and abundant H-bond networks in MOF-801 frameworks, the membrane exhibited better H/V selectivity (up to 194) and conductivity (about 0.028 S/cm) than commercial Nafion-117 membrane (H/V selectivity: similar to 9.5, conductivity: 0.017 S/cm). VFB results revealed that a cell with above MOF polycrystalline membrane showed high coulombic efficiency (CE: 96.1%) and excellent energy efficiency (EE: 83.2%) at 20 mA/cm(2), which was much comparable to Nafion membrane. This work demonstrates that MOF polycrystalline membrane is a promising candidate as ion sieving membrane for energy technique.