Nafion/graphene oxide layered structure membrane for the vanadium redox flow battery

Yong Gun Shul, Young Hwan Chu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The graphene oxide (GO) layer is applied to the ion-exchange membrane of the vanadium redox flow battery (VRB) system to reduce the vanadium ion permeation through the membrane. The pristine Nafion 117 membrane (Nafion) is coated with the Nafion/GO emulsion solution to prepare the modified GO coated Nafion 117 membrane (GO-Nafion). The GO-Nafion and Nafion show nearly the same IEC and water uptake results. The SEM image shows that the GO/Nafion ionomer layer is coated uniformly on the surface of the Nafion membrane with the thickness of 4~5 μm. The vanadium ion permeation is reduced effectively by using the GO-Nafion instead of the Nafion for the VRB system. The permeability of the GO-Nafion is 6.1×10-7 cm2 min-1 which is less than one third that of Nafion (20.5 × 10-7 cm2 min-1). Higher coulombic efficiency (CE) and energy efficiency (EE) is obtained with the GO-Nafion in the VRB system. We can suggest that the GO application for the VRB system can be a promising strategy to reduce vanadium ion permeation and to successfully improve the VRB performance.

Original languageEnglish
Pages (from-to)1445-1452
Number of pages8
JournalScience of Advanced Materials
Volume6
Issue number7
DOIs
Publication statusPublished - 2014 Jul

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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