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Orderly sandwich-shaped graphene oxide/Nafion composite membranes for direct methanol fuel cells.
- Source :
-
Journal of Membrane Science . Oct2015, Vol. 492, p58-66. 9p. - Publication Year :
- 2015
-
Abstract
- A novel type of graphene oxide (GO)/Nafion composite membrane is fabricated and used as a proton exchange membrane for direct methanol fuel cells (DMFCs) in this article. The membranes are prepared by depositing GO nanosheets on the surface of recast Nafion ® 117 via a layer-by-layer (LbL) procedure using 1, 4-phenyldiamine hydrochloride (PDHC) as the cross-linker. This approach prevents the GO nanosheets from dissolving in water and imparts the composite membranes a good stability. The methanol permeability of the composite membranes is lower than that of recast Nafion ® 117 measured under the same conditions. The composite membrane with 80-layered GO nanosheets exhibits a value of 6.7×10 −8 cm 2 s −1 at 30 °C, which is two orders of magnitude lower than that of recast Nafion ® 117. In addition, the relative selectivity of the composite membranes is 5 times higher than that of recast Nafion ® 117. The endurance time of the composite membranes in Fenton׳s reagent is 10 times longer than that of Nafion. Single cell evaluation using the composite membrane with 50-layered GO showed an open circuit voltage (OCV) of 0.67 V. A maximum power density of 64.38 mW cm −2 at a current density of 200 mA cm −2 can be achieved at 60 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03767388
- Volume :
- 492
- Database :
- Academic Search Index
- Journal :
- Journal of Membrane Science
- Publication Type :
- Academic Journal
- Accession number :
- 108505556
- Full Text :
- https://doi.org/10.1016/j.memsci.2015.05.049