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- W2046806265 abstract "Abstract In order to reduce the permeation of vanadium ions across the ion exchange membrane during the operation of vanadium redox flow battery (VRB) based on Nafion membrane, the interfacial polymerization was applied to form a cationic charged layer on the surface of Nafion 117 membrane. The area resistance and the permeability of vanadium ions were measured. The results indicate that comparing with the unmodified Nafion membrane, the modification of Nafion membrane results in a dramatic reduction in crossover of vanadium ions across the membrane and a little higher area resistance of the membrane. As a result, the columbic efficiency for the VRB single cell based on the modified Nafion membrane(VRB-modified Nafion), which is related to the concentration of the incubation solution of polyethylenimine (PEI), was increased significantly. The value is 96.2–97.3%, which is higher than that obtained with the VRB single cell based on unmodified Nafion membrane(VRB-Nafion) (around 93.8%). Due to the little higher area resistance caused by the modification, the voltage efficiency of VRB-modified Nafion is lower than that of VRB-Nafion. Furthermore, the water transfer across the modified membrane was also reduced. The ion exchange capacity (IEC) of the modified Nafion membrane was also evaluated. The formation of the thin cationic charged layer on the membrane surface was confirmed by IR spectra analysis." @default.
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- W2046806265 date "2008-03-01" @default.
- W2046806265 modified "2023-10-16" @default.
- W2046806265 title "Modification of Nafion membrane using interfacial polymerization for vanadium redox flow battery applications" @default.
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- W2046806265 doi "https://doi.org/10.1016/j.memsci.2007.11.055" @default.
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