直接甲醇燃料电池中的膜性能比较  

Comparison on Properties of Membranes for Direct Methanol Fuel Cell

作　　者：邓会宁[1] 李磊[1] 许莉[1] 王宇新[1] 

机构地区：[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

出　　处：《物理化学学报》2004年第11期1372-1375,共4页Acta Physico-Chimica Sinica

基　　金：国家基础研究重大项目计划(G20000264);国家自然科学基金(29976033);天津市自然科学基金(023607011)资助项目~~

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.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 similar to 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.

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 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O646[理学—物理化学]