Please use this identifier to cite or link to this item: https://doi.org/10.3389/fchem.2018.00286
Title: SPEEK membrane of ultrahigh stability enhanced by functionalized carbon nanotubes for vanadium redox flow battery
Authors: Ding M.
Ling X.
Yuan D. 
Cheng Y. 
Wu C.
Chao Z.-S.
Sun L.
Yan C.
Jia C.
Keywords: Carbon nanotube
Ion exchange membrane
Redox flow battery
Sulfonated poly(ether ether ketone)
Vanadium redox flow battery
Issue Date: 2018
Publisher: Frontiers Media S.A.
Citation: Ding M., Ling X., Yuan D., Cheng Y., Wu C., Chao Z.-S., Sun L., Yan C., Jia C. (2018). SPEEK membrane of ultrahigh stability enhanced by functionalized carbon nanotubes for vanadium redox flow battery. Frontiers in Chemistry 6 (JUL) : 286. ScholarBank@NUS Repository. https://doi.org/10.3389/fchem.2018.00286
Abstract: Proton exchange membrane is the key factor of vanadium redox flow battery (VRB) as their stability largely determine the lifetime of the VRB. In this study, a SPEEK/MWCNTs-OH composite membrane with ultrahigh stability is constructed by blending sulfonated poly(ether ether ketone) (SPEEK) with multi-walled carbon nanotubes toward VRB application. The carbon nanotubes disperse homogeneously in the SPEEK matrix with the assistance of hydroxyl group. The blended membrane exhibits 94.2 and 73.0% capacity retention after 100 and 500 cycles, respectively in a VRB single cell with coulombic efficiency of over 99.4% at 60 mA cm-2 indicating outstanding capability of reducing the permeability of vanadium ions and enhancing the transport of protons. The ultrahigh stability and low cost of the composite membrane make it a competent candidate for the next generation larger-scale vanadium redox flow battery. © 2018 Ding, Ling, Yuan, Cheng, Wu, Chao, Sun, Yan and Jia.
Source Title: Frontiers in Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/152048
ISSN: 22962646
DOI: 10.3389/fchem.2018.00286
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