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Proton Conductivity and Methanol Permeability of Sulfonated Poly(aryl ether sulfone)/Modified Graphene Hybrid Membranes  

Huh, Hoon (Korea Institute of Industrial Technology (KITECH))
Kim, Deuk-Ju (School of Materials Science and Engineering, i-Cube Center, Gyeongsang National University)
Nam, Sang-Yong (School of Materials Science and Engineering, i-Cube Center, Gyeongsang National University)
Publication Information
Membrane Journal / v.21, no.3, 2011 , pp. 247-255 More about this Journal
Abstract
In this study, to obtain good dispersity of graphene which has excellent conductivity and mechanical strength, the graphene was modified by two different methods. Then the SPAES/graphene hybrid membranes were fabricated from different graphene contents. We compared performance of composite membrane with different preparing method of graphene and content of modified graphene. The morphology of the composite membranes has been investigated using SEM. Chemical structure of modified graphene was analyzed using by FT-IR and EDX. The proton conductivity and methanol permeability of the hybrid membranes were studied with changing graphene content from 0.5 to 3.0 wt.%. The SPAES/modified graphene composite membranes showed high proton conductivity (0.21 S/cm) compared with the SPAES membrane (0.09 S/cm) at $80^{\circ}C$ and 100% relative humidity condition. And the methanol permeability was decreased linearly as the content of modified graphene increased from 0 to 1.5 wt%.
Keywords
modified graphene; direct methanol fuel cell; proton conductivity; methanol permeability; selectivity;
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