直接甲醇燃料电池用阻醇全氟磺酸复合质子交换膜  

Methanol-Blocking Perfluorosulfonic Acid Composite Membranes in Direct Methanol Fuel Cells

作　　者：李涛[1] 钟贵明[1] 杨勇[1] 

机构地区：[1]厦门大学化学化工学院化学系厦门大学固体表面物理化学国家重点实验室,厦门361005

出　　处：《化学进展》2010年第2期522-536,共15页Progress in Chemistry

基　　金：国家自然科学基金项目(No.20433060)资助

摘　　要：全氟磺酸膜(如杜邦公司生产的Nafion系列产品)作为质子交换膜广泛应用于直接甲醇燃料电池,但其存在着燃料甲醇渗透率高的缺陷,是阻碍直接甲醇燃料电池应用的主要问题之一。本文介绍了直接甲醇燃料电池用阻醇全氟磺酸复合质子交换膜的最新研究进展,比较了各类无机、有机添加物对复合膜甲醇渗透率、质子电导率以及电池性能的影响,并讨论了添加物对全氟磺酸质子交换膜甲醇、质子传递的影响机理。此外,针对大多数复合膜以牺牲质子电导来抑制甲醇渗透的问题,对如何提高复合膜质子对甲醇选择性及其未来发展趋势提出了一些设想。Perfluorosulfonic acid （PFSA） membrane （e.g. Nafion by Dupont） has been used as proton exchange membrane （PEM） for the DMFC widely. However, the disadvantage of methanol crossover through Nafion is one of the major problems in the application of DMFC. Recent research progress in methanol-blocking perfluorosulfonic acid composite membranes is reviewed in this paper. The effects of various inorganic/organic additives on the methanol permeability, the proton conductivity as well as the cell performance of the composite membranes have been summarized and compared. The transport mechanism of methanol and proton in the composite membranes is also discussed. In addition, future trends and the difficulty in the research at improving the proton selectivity of the composite membrane are reviewed and discussed.

关 键 词：直接甲醇燃料电池 阻醇 复合膜 质子选择性 

分 类 号：TM911.48[电气工程—电力电子与电力传动]