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

Fingerprint

Vanadium
Membrane structures
Graphite
Oxides
Graphene
Permeation
Membranes
Ions
perfluorosulfonic acid
Flow batteries
Ion exchange membranes
Ionomers
Emulsions
Energy efficiency
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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Nafion/graphene oxide layered structure membrane for the vanadium redox flow battery. / Shul, Yong Gun; Chu, Young Hwan.

In: Science of Advanced Materials, Vol. 6, No. 7, 07.2014, p. 1445-1452.

Research output: Contribution to journalArticle

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