Sulfonated polyimide/chitosan composite membranes for a vanadium redox flow battery: influence of the sulfonation degree of the sulfonated polyimide

descriptionPublicationkeyboard_double_arrow_right Article 27 Apr 2016 English Publisher:Springer Science and Business Media LLCJournal:Polymer Journal, volume 48, pages 905-918 (issn: 0032-3896, eissn: 1349-0540,

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Authors: Xiaodong Huang; Shuai Zhang; Yaping Zhang; Hongping Zhang; Xuping Yang;

doi: 10.1038/pj.2016.42

Sulfonated polyimide/chitosan composite membranes for a vanadium redox flow battery: influence of the sulfonation degree of the sulfonated polyimide

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Abstract

The sandwich-like sulfonated polyimide/chitosan (SPI/CS) composite membranes were prepared and the SDs of the SPI were adjusted from 30 to 70%. Based on the proton/vanadium ion selectivity and chemical stability, the SPI40/CS and SPI50/CS membranes are selected as optimum candidates for all-vanadium redox flow battery (VRFB) applications. The 100-time cyclic charge–discharge testing (50 mA cm−2) results show that the SPI40/CS membrane possessed higher coulombic efficiency than Nafion 117. In addition, the SPI40/CS membrane exhibited more stable energy efficiency than pure SPI40 membrane.

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Southwest University of Science and Technology
China (People's Republic of)

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