Moon-Sung Kang*
Department of Environmental Engineering, Sangmyung University, Cheonan 330-720, Korea
Thin pore-filled cation and anion-exchange membranes (PFCEM and PFAEMs,
tm = 25-30 μm) were prepared using a porous polymeric substrate for efficient all-vanadium
redox flow battery (VRB). The electrochemical and charge-discharge performances of the membranes
have been systematically investigated and compared with those of commercially available
ion-exchange membranes. The pore-filled membranes were shown to have higher
permselectivity as well as lower electrical resistances than those of the commercial membranes.
In addition, the VRBs employing the pore-filled membranes exhibited the respectable chargedischarge
performances, showing the energy efficiencies (EE) of 82.4% and 84.9% for the
PFCEM and PFAEM, respectively (cf. EE = 87.2% for Nafion 1135). The results demonstrated
that the pore-filled ion-exchange membranes could be successfully used in VRBs as an efficient
separator by replacing expensive Nafion membrane.
Keyword : Pore-filled, Cation and anion-exchange membranes, All-vanadium redox flow battery,
Charge-discharge performances