title: A Highly Ion-Selective Zeolite Flake Layer on Porous Membranes for Flow Battery Applications.
abstract: Zeolites are crystalline microporous aluminosilicates with periodic arrangements of cages and well-defined channels, which make them very suitable for separating ions of different sizes, and thus also for use in battery applications. Herein, an ultra-thin ZSM-35 zeolite flake was introduced onto a poly(ether sulfone) based porous membrane. The pore size of the zeolite (ca. 0.5 nm) is intermediary between that of hydrated vanadium ions (>0.6 nm) and protons (<0.24 nm). The resultant membrane can thus be used to perfectly separate vanadium ions and protons, making this technology useful in vanadium flow batteries (VFB). A VFB with a zeolite-coated membrane exhibits a columbic efficiency of >99 % and an energy efficiency of >81 % at 200 mA cm(-2), which is by far the highest value ever reported. These convincing results indicate that zeolite-coated membranes are promising in battery applications.
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China.|Graduate School of Chinese Academy of Sciences, Beijing, 100039, P.R. China.
authors.forename: Zhizhang
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: Division of Fossil Energy Conversion, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China.
authors.forename: Xiangxue
authors.initials: X
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China.
authors.forename: Mingrun
authors.initials: M
authors.lastname: Li
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China.|Graduate School of Chinese Academy of Sciences, Beijing, 100039, P.R. China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Lu
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China. lixianfeng@dicp.ac.cn.|Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian, 116023, P.R. China. lixianfeng@dicp.ac.cn.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Li
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P.R. China. zhanghm@dicp.ac.cn.|Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian, 116023, P.R. China. zhanghm@dicp.ac.cn.
authors.forename: Huamin
authors.initials: H
authors.lastname: Zhang
keywords: ZSM-35 zeolite; energy storage; flow batteries; pore size exclusion; porous membranes