Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 35, Pages 10458-10464Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11459g
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Funding
- Office of Naval Research Young Investigator Program [N00014-10-1-0752]
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A polysulfone-based anion exchange membrane functionalized with quaternary benzyl trimethylammonium groups (PSF-TMA(+)) demonstrated a 40-fold reduction in vanadium(IV) permeability when compared to a Nafion (R) membrane. Comprehensive 2D NMR (COSY and heteronuclear quantum correlation spectroscopy) studies verified that PSF-TMA(+) remained chemically stable even after exposure to a 1.5 M vanadium(V) solution for 90 days. Excellent energy efficiencies (85%) were attained and sustained over several charge-discharge cycles for a vanadium redox flow battery prepared using the PSF-TMA(+) separator.
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