Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 415, Issue -, Pages 696-701Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2012.05.057
Keywords
Composite membrane; Sulfonated silica; Direct methanol fuel cell; Methanol crossover; Proton conducting membrane
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Funding
- Fundamental R&D Program for Core Technology of Materials and the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning [20112010100110]
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology (MEST) of Korea [2012-0000591]
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Sulfonated SiO2 nanoparticles with uniform core-shell structure are synthesized and used as functional fillers for preparing composite proton conducting membranes for direct methanol fuel cells (DMFCs). Poly(4-styrenesulfonic acid) in the shell of SiO2 nanoparticle contributes well-dispersion of the SiO2 nanoparticle in the Nafion membrane. The addition of core-shell SiO2 nanoparticles into Nafion matrix is very effective in improving membrane performance, including ion exchange capacity, proton conductivity, mechanical strength and methanol permeability. As a result, the DMFC assembled with a composite membrane exhibits superior performance as compared to a Nafion-based cell. (c) 2012 Elsevier B.V. All rights reserved.
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