物理化学学报 >> 2004, Vol. 20 >> Issue (11): 1372-1375.doi: 10.3866/PKU.WHXB20041117

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直接甲醇燃料电池中的膜性能比较

邓会宁;李磊;许莉;王宇新   

  1. 天津大学化工学院,化学工程研究所, 化学工程联合国家重点实验室, 天津　300072
  • 收稿日期:2004-04-23 修回日期:2004-05-28 发布日期:2004-11-15
  • 通讯作者: 王宇新 E-mail:yxwang@tju.edu.cn

Comparison on Properties of Membranes for Direct Methanol Fuel Cell

Deng Hui-Ning;Li Lei;Xu Li;Wang Yu-Xin   

  1. State Key Laboratory of Chemical Engineering, Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin　300072
  • Received:2004-04-23 Revised:2004-05-28 Published:2004-11-15
  • Contact: Wang Yu-Xin E-mail:yxwang@tju.edu.cn

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摘要： 制备了磺化聚醚醚酮(SPEEK)和磺化酚酞型聚醚砜(SPES-C)两种质子交换膜,考察了其质子导电和阻醇性能.实验发现,两种新型质子交换膜具有一定的化学稳定性和质子电导率,尤其在高温下两种新膜的质子电导率与Nafion膜接近.两种新膜的甲醇透过系数要比Nafion膜的低1～2个数量级.分别以两种新型膜和Nafion115膜为电解质制备了直接甲醇燃料电池膜电极,讨论了膜材料的性能对直接甲醇燃料电池性能的影响.结果表明,膜材料的阻醇性越好,电池的开路电压越高;膜的电导率越高,在较高电流密度区域内电池的性能越好.

关键词: 直接甲醇燃料电池, 质子交换膜, 膜电极组装, 质子电导率, 透醇性能

Abstract: New proton exchange membranes of sulfonated poly(ether ether ketone)(SPEEK) and sulfonated phenolphthalein poly(ether sulfone)(SPES-C) were prepared and their proton conductivity and methanol permeability were investigated. The new membranes show a high proton conductivity, which is close to that of Nafion especially at high temperature. Methanol permeability of the new membranes is 1～2 order lower than that of Nafion and the SPEEK membrane has the lowest methanol permeability. Direct methanol fuel cell (DMFC) performances of the new PEMs were also studied and the result demonstrates that the membranes with low methanol permeability show a high open circuit voltage. However, the performance of the DMFC is mainly controlled by the proton conductivity of the membranes at high current density.

Key words: Direct methanol fuel cell(DMFC), Proton exchange membrane, Membrane electrode assemble (MEA), Proton conductivity, Methanol permeability