Engineering zwitterionic barrier by squaraine-based porous organic framework fiber for superior lithium-sulfur batteries
Zhang X. Zhao J. Zhao Y. Bakenov Z. Zhang Y.
20 November 2021Elsevier Ltd
Electrochimica Acta
2021#397
The lithium sulfur (Li-S) battery holds great promise in next-generation energy storage technologies. However, the lithium polysulfide (LiPS) shuttle and slow reaction kinetics still limit its commercial development. Here, a squaraine-based porous organic framework (POF) with sulfophilic and lithiophilic moieties was developed as the separator modifications for the first time. The POF coating layer on the common separator builds a strong barrier against the LiPS shuttling, resulting in a robust inhibition on the shuttle effect as well as boosted sulfur reaction kinetics. Therefore, the POF-PP separator demonstrates stable cycling performance with a low capacity attenuation rate of 0.04% over 500 cycles and high areal discharge capacity of 4.67 mAh cm−2 with a sulfur loading of 5 mg cm−2, which show high potential for high loading and practical Li-S battery.
Li-S battery , Modified separator , Porous organic frameworks , Zwitterionic barrier
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Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Materials Science and Engineering, Hebei University of Technology, No.8 Guangrong Road, Hongqiao District, Tianjin, 300130, China
Department of Chemical and Materials Engineering, National Laboratory Astana, Institute of Batteries LLP, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Hebei Key Laboratory of Functional Polymers
State Key Laboratory of Reliability and Intelligence of Electrical Equipment
Department of Chemical and Materials Engineering
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