Volume 127, Issue 5 pp. 4150-4159
Article

Sulfonated polyimide/chitosan composite membrane for vanadium redox flow battery: Membrane preparation, characterization, and single cell performance

Mingzhu Yue

Mingzhu Yue

Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, People's Republic of China

Department of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China

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Yaping Zhang

Corresponding Author

Yaping Zhang

Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, People's Republic of China

Department of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China

Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, People's Republic of China===Search for more papers by this author
Lei Wang

Lei Wang

Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, People's Republic of China

Department of Chemistry, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China

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First published: 31 May 2012
Citations: 41

Abstract

A novel sulfonated polyimide/chitosan (SPI/CS) composite membrane was prepared from self-made SPI (50% of sulfonation degree) through an immersion and self-assembly method, which was successfully applied in vanadium redox flow battery (VRB). The proton conductivity of SPI/CS composite membrane is effectively improved compared to the plain SPI membrane. The VO2+ permeability coefficient across SPI/CS composite membrane is 1.12 × 10−7 cm2 min−1, which is only one tenth of that of Nafion® 117 membrane. Meanwhile, the proton selectivity of SPI/CS composite membrane is about eight times higher than that of Nafion® 117 membrane. In addition, the oxidative stability SPI/CS composite membrane is superior to that of pristine SPI membrane. The VRB single cell using SPI/CS composite membrane showed higher energy efficiency (88.6%) than that using Nafion® 117 membrane, indicating that SPI/CS composite membrane is a promising proton conductive membrane for VRB application. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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