期刊
JOURNAL OF MEMBRANE SCIENCE
卷 583, 期 -, 页码 103-109出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2019.04.031
关键词
Sulfonated silica; Composite membrane; Low relative humidity; Proton conductivity; Fuel cell performance
资金
- DGIST R&D Program of the Ministry of Science and ICT of Korea [19-IT-02]
- National Research Foundation of Korea [19-IT-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Sulfonated silica, synthesized by using tetraethyl orthosilicate and chlorosulfuric acid through calcination, was used as a filler to create Nafion-SSA composite membranes for applying proton exchange membrane fuel cells under low relative humidity (RH) condition. High water uptake and ion exchange capacity values were observed, and the Nafion-SSA composite membrane showed improved proton conductivity than that of the recast Nafion. The fuel cell operating at 80 degrees C under 20% RH with Nafion-SSA composite membrane showed 2.8 times higher maximum power density (454 mW cm(-2)) and current density (2062 mA cm(-2)) in comparison with the recast Nafion (159 mW cm(-2), 734 mA cm(-2)). The thermal stability and mechanical properties of recast Nafion and Nafion-SSA composite membranes were evaluated by TGA and Tensile test.
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