Modification of Nafion® Membrane via a Sol-Gel Route for Vanadium Redox Flow Energy Storage Battery Applications

Table 3

The single cell efficiency for VRFB system based on the pristine N-117 membrane and modified NM-1H membrane.

Samples	Coulombic efficiency	Voltage efficiency	Energy efficiency
	(%)	(%)	(%)
N-117	82	87	71
NM-1H	94	87	82