Preparation of Nafion/SiO2 Composite Membrane of Direct Ethanol Fuel Cell

Abstract:

Membranes are made by doping and modifying the Nafion117 with Nano-silica(SiO2). The penetration and the proton conductivity of composite membrane are studied through gas chromatograph and electrochemical workstation. With the help of cross-section spectrum, it shows that the SiO2 particles can penetrate the internal membrane and the weight percentage is greater than 0.1% after doping and modifying the membranes of Nafion117, so the SiO2 particles has a very good combination with the substrate. The membrane which is handled by Sol on 60°C has high proton conductivity and high water retention performance in high temperature. The permeability coefficient of membrane which is handled by Sol on 60°C and by the other ways are 4.07×10-4cm2/s and 8.13×10-4 cm2/s respectively. It shows that the permeability coefficient of ethanol membrane is reduced by half after the Nafion117 membrane is handled by Sol on 60°C.

• Periodical: Key Engineering Materials (Volume 464)
• Pages: 395-400
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.464.395
• Online since: January 2011
• Authors: Hong Jun Ni, Can Can Lv, Cheng Jin Zhang, Ping Liao
• Keywords: Direct Ethanol Fuel Cell (DEFC), Ethanol Crossover, Proton Conductivity, Proton Exchange Membrane Fuel Cell

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