TY  - JOUR
N1  - cited By 25
SP  - 182
ID  - scholars11774
SN  - 03787753
TI  - Improving the redox flow battery performance of low-cost thin polyelectrolyte membranes by layer-by-Layer Surface assembly
Y1  - 2019///
A1  - Sha'rani, S.S.
A1  - Abouzari-Lotf, E.
A1  - Nasef, M.M.
A1  - Ahmad, A.
A1  - Ting, T.M.
A1  - Ali, R.R.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058783942&doi=10.1016%2fj.jpowsour.2018.12.037&partnerID=40&md5=730796b8db5ba93b75b25f1d8afac058
PB  - Elsevier B.V.
KW  - Chemical stability; Chlorine compounds; Costs; Energy efficiency; Energy storage; Ions; Membranes; Polyelectrolytes; Proton conductivity; Styrene; Vanadium
KW  -  Layer by layer; Perfluorinated membranes; Perfluorinated sulfonic acid membranes; Poly (diallyldimethylammonium chloride); Polyelectrolyte membranes; Sodium styrene sulfonates; Vanadium ion permeabilities; Vanadium redox flow batteries
KW  -  Flow batteries
EP  - 190
AV  - none
N2  - The search of new membranes for vanadium redox flow battery with low vanadium ions permeation rates, high ion conductivity, excellent proton conductivity, low area resistance, chemical stability, and low cost is on a soaring demand. In this work, a simple modification method is applied to improve the performance of commercially available low-cost membranes by applying several polyelectrolytes layers. Particularly, graphene-containing commercial perfluorinated sulfonic acid membrane of GN212C with a thickness of 33 μm is modified by introducing alternate layers of positively charged poly(diallyldimethylammonium chloride) and negatively charged poly(sodium styrene sulfonate). Microscopy and spectroscopy investigations indicate that the polyelectrolytes layers are successfully deposited on the membrane surface. The effects of the layer composition and number of bilayers are evaluated with regard to vanadium ion permeability, proton conductivity and battery performance. The modified membranes exhibit an improved vanadium (VO2+) barrier property, which enhances the VRFB single cell performance in terms of coulombic efficiency and energy efficiency compared to pristine GN212C and Nafion 117 membranes. The overall results suggest that the bi-ionically modified membrane is a potential candidate for application in flow battery despite its small thickness. © 2018 Elsevier B.V.
JF  - Journal of Power Sources
VL  - 413
ER  -