A Highly Ion-Selective Zeolite Flake Layer on Porous Membranes for Flow Battery Applications

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 p...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2016-02, Vol.55 (9), p.3058-3062
Main Authors: Yuan, Zhizhang, Zhu, Xiangxue, Li, Mingrun, Lu, Wenjing, Li, Xianfeng, Zhang, Huamin
Format: Article
Language:English
Subjects:
Aluminosilicates
Aluminum silicates
Batteries
Cages
Crystal structure
Energy efficiency
Energy management
energy storage
flow batteries
Ions
Membranes
Pore size
pore size exclusion
Porosity
porous membranes
Power efficiency
Protons
Rechargeable batteries
Vanadium
Zeolites
ZSM-35 zeolite
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Summary: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 (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. Go with the flow: For the first time, a zeolite‐coated membrane that can perfectly separate ions of different sizes was fabricated for use in flow battery applications. See picture; large and small spheres are redox‐active and non‐reaction ions, respectively.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201510849