Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 807, Issue -, Pages 88-96Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2017.11.034
Keywords
Vanadium redox flow battery; Nafion membrane; Graft polymerization; Sodium styrenesulfonate; Vanadium permeability
Categories
Ask authors/readers for more resources
A modified membrane for vanadium redox flow battery (VRFB) was prepared by grafting sodium 4-styrenesulfonate (NaSS) to the surface of Nafion 212 via the oxygen plasma induced grafting technique to reduce the crossover of vanadium ions of the membrane. By grafting with poly(styrenesulfonic acid) (PSS), the crossover of vanadium ions through the Nafion membrane is only 32% of that of the pristine Nafion membrane. Thus, comparing with pristine Nafion membrane, the resulting Nafion-g-PSS membrane exhibits higher ion exchange capacity (IEC) and through-plane conductivity. In addition, this Nafion-g-PSS membrane improves the voltage efficiency (VE), coulombic efficiency (CE), and energy efficiency (EE) of VRFB. Owing to lower vanadium ions permeability, the VRFB with Nafion-g-PSS membrane exhibited much slower self-discharge than the VRFB with pristine Nafion 212, and the VE, CE, and EE after 200 cycles of charge-discharge test remain stable. In particular, the VRFB with Nafion-g-PSS membrane exhibits higher capacity retention than the VRFB with pristine Nafion 212 membrane.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available