標題: Sulfonated graphene oxide/Nafion composite membranes for high-performance direct methanol fuel cells
作者: Chien, Hung-Chung
Tsai, Li-Duan
Huang, Chiu-Ping
Kang, Chi-yun
Lin, Jiunn-Nan
Chang, Feng-Chih
應用化學系
Department of Applied Chemistry
關鍵字: Nafion;Sulfonated graphene oxide;Methanol crossover;Direct methanol fuel cells
公開日期: 17-十月-2013
摘要: An easy and effective method for producing low methanol-crossover membranes is developed by dispersing sulfonated graphene oxide (SGO) into a Nafion matrix. A SGO/Nafion mixture with low SGO content exhibits unique viscosity behavior and allows for better SGO dispersion within the Nafion. After film casting, the composite membranes show lower methanol and water uptakes, a reduced swelling ratio, improved proton conductivity in low relative humidity, and extremely high methanol selectivity, which can be implemented in direct methanol fuel cells (DMFCs). The regular backbone of the composite membrane shows a higher storage modulus, increased a-relaxation (transition temperature), and improved tolerance to pressure during membrane electrode assembly (MEA). The small angle X-ray spectra indicate the shrinkage of the ionic clusters in the composite membranes, which thus reduce methanol crossover. The hybrid membranes applied to DMFCs demonstrate performances superior to that of the commercial Nafion 115 in 1 M and 5 M methanol solutions. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijhydene.2013.08.036
http://hdl.handle.net/11536/23301
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2013.08.036
期刊: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume: 38
Issue: 31
起始頁: 13792
結束頁: 13801
顯示於類別:期刊論文


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