磺化聚醚砜/薄水铝石复合质子交换膜的性能

doi:10.3866/PKU.WHXB20110737

Abstract

Abstract:

Novel sulfonated polyether sulfone (SPES)/AlOOH organic/inorganic composite membranes were prepared by doping SPES with AlOOH, which lowered the methanol crossover and increased the proton conductivity at high temperatures. The structure and performance of the obtained membranes were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) etc. Compared with the pure SPES membrane the composite membranes had higher thermal stability and water uptake. The morphology of the composite membranes indicated that AlOOH was uniformly distributed throughout the SPES matrix. The network-like structure began to form when the AlOOH content was around 10%. The proton conductivity was still ca 0.014 S·cm^-1 even at a temperature as high as 120 °C. Additionally, the methanol resistance improved greatly as the content of AlOOH increased. The SPES/AlOOH composite membrane is a promising candidate for direct methanol fuel cell (DMFC) applications.

Key words: Sulfonated poly(ether sulfone), AlOOH, Composite membrane, Direct methanol fuel cell

WEN Sheng, GONG Chun-Li, TSAI Fang-Chang, YEH Jen-Taut. Properties of SPES/AlOOH Composite Proton Exchange Membranes[J]. Acta Phys. -Chim. Sin. 2011, 27(08), 1886-1892. doi: 10.3866/PKU.WHXB20110737

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Properties of SPES/AlOOH Composite Proton Exchange Membranes

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