| 초록 |
Vanadium redox flow battery (VRB) invented by Skyllas - Kazacos group in 1985 is attracting a lot of attentions from scientists over the world. A VRB includes two tanks where the electrolytes of V(IV)/V(V) and V(III)/V(II) in sulfuric acid solution are stored, one battery cell where the reduction-oxidation reactions take place, two pumps that help the electrolytes circulated and an ion exchange proton membrane that separates the two electrolyte. The most used membrane in the VRB is Nafion because it has very good properties. However, it suffers from the permeability of vanadium ions when used in VRB, that decreases the efficiencies of VRB. To reduce the crossover of vanadium ions, Nafion/SiO2 hybrid membrane synthesized by sol-gel method is used for VRB. The permeability of vanadium ions through Nafion/SiO2 hybrid membrane and the efficiencies of VRB using it are measured and compared to those of pristine Nafion. |
