Preparation and characterization of sulfonated polysulfone/titanium dioxide composite membranes for proton exchange membrane fuel cells
Preparation and characterization of sulfonated polysulfone/titanium dioxide composite membranes for proton exchange membrane fuel cells
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DOI：
10.1016/j.ijhydene.2009.02.019
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发表时间：
2009-05-01
影响因子：
7.2
通讯作者：
Eroglu, Inci
中科院分区：
文献类型：
--
作者：
Devrim, Yiser;Erkan, Serdar;Eroglu, Inci
在本研究中，研究了用于质子交换膜燃料电池（PEMFC）的磺化聚砜（sPS）/二氧化钛（TiO2）复合膜。在环境温度下，用氯磺酸三甲基甲硅烷基酯在 1,2 二氯乙烷中磺化聚砜 (PS)。结果表明，磺化度随着磺化剂与PS重复单元的摩尔比的增加而增加。通过元素分析测定磺化度并进行H-1 NMR以验证PS上的磺化反应。通过改变磺化剂的含量可以很容易地实现 15% 至 40% 的磺化水平。通过溶液浇铸程序将 TiO2 与 DMAC（5 wt.%）中的 sPS 溶液混合来制备复合膜。通过热分析、吸水率、质子电导率测量和单细胞性能对膜进行了表征。 TiO2 的添加提高了热稳定性，但高填料浓度降低了复合材料组分的混溶性，并导致膜脆化。复合膜的电导率值在10(-3)-10(-2)S/cm范围内。膜的电导率随着工作温度的变化显示出类似的增加趋势。这些膜在 60-85 摄氏度的加湿 H-2/O-2 中运行的单池中进行了测试。在不同工作温度下进行的单燃料电池测试表明，sPS/TiO2 复合膜比 sPS 膜更具流体动力学稳定性，并且性能也更好。对于在 1 个大气压和 85 摄氏度下工作的 H-2-O-2/PEMFC，sPS/TiO2 膜在 0.6 V 电压下获得了 300 mA/cm(2) 的最高性能。结果表明，sPS/TiO2 是一种有前景的膜材料，可用于质子交换膜燃料电池。 (C) 2009 年国际氢能协会。由爱思唯尔有限公司出版。保留所有权利。
In the present study, sulfonated polysulfone (sPS)/titanium dioxide (TiO2) composite membranes for use in proton exchange membrane fuel cells (PEMFCs) were investigated. Polysulfone (PS) was sulfonated with trimethylsilyl chlorosulfonate in 1,2 dichloroethane at ambient temperatures. It was shown that the degree of sulfonation is increased with the molar ratio of the sulfonating agent to PS repeat unit. The degree of sulfonation was determined by elemental analysis and H-1 NMR was performed to verify the sulfonation reaction on the PS. Sulfonation levels from 15 to 40% were easily achieved by varying the content of the sulfonating agent. Composite membranes were prepared by blending TiO2 with sPS solution in DMAC (5 wt.%) by the solution casting procedure. The membranes have been characterized by thermal analysis, water uptake, proton conductivity measurements and single cell performance. The addition of TiO2 increased the thermal stability but high filler concentrations decreased the miscibility of the composite component, and resulted in brittle membranes. The conductivity values in the range of 10(-3)-10(-2) S/cm were obtained for composite membranes. The conductivities of the membranes show similar increasing trend as a function of operating temperature. The membranes were tested in a single cell operating at 60-85 degrees C in humidified H-2/O-2. single fuel cell tests performed at different operating temperatures indicated that sPS/TiO2 composite membrane is more hydrodynamically stable and also performed better than sPS membranes. The highest performance of 300 mA/cm(2) was obtained for sPS/TiO2 membrane at 0.6 V for an H-2-O-2/PEMFC working at 1 atm and 85 degrees C. The results show that sPS/TiO2 is a promising membrane material for possible use in proton exchange membrane fuel cells. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.