Silica modified nanofiltration membranes with improved selectivity for redox flow battery application
Energy & Environmental Science2011Vol. 5(4), pp. 6299–6303
Citations Over TimeTop 10% of 2011 papers
Hongzhang Zhang, Hongzhang Zhang, Huamin Zhang, Huamin Zhang, Xianfeng Li, Zhensheng Mai, Wenping Wei
Abstract
Nanofiltration (NF) membranes with in situ assembled silica on the surface and in the pores were proposed and successfully prepared for vanadium redox flow battery (VRB) applications to improve the vanadium/proton selectivity. VRBs assembled with the modified membranes exhibited much higher Coulombic efficiency than that with original NF membranes, while with a similar voltage efficiency. The results indicate that silica modification can effectively increase the membranes' ion selectivity and maintain good ion-conducting properties. The concept provides an effective way to fabricate high performance porous membranes for VRB applications.
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