质子交换膜燃料电池用Nafion/SiO_2复合膜  

Study on silicon oxide nafion composite membranes for proton exchange membrane fuel cell operation

作　　者：刘永浩[1] 衣宝廉[1] 张华民[1] 

机构地区：[1]中国科学院大连化学物理研究所燃料电池工程中心,辽宁大连116023

出　　处：《电源技术》2005年第2期92-94,112,共4页Chinese Journal of Power Sources

摘　　要：采用溶胶-凝胶法以TEOS(正硅酸乙酯)和商业化的Nafion115膜为原料制备了Nafion115/SiO2复合膜。在Nafion膜的酸性介质中,TEOS水解聚合得到SiO2以及含有羟基和乙氧基的硅烷混合物,从而形成Nafion115/SiO2复合膜。将Nafion115/SiO2复合膜与电极组装成MEA,在110℃和130℃的电池温度下评价电池性能。在电池温度为130℃、操作压力为0.25MPa、电池电压为0.7V时,使用Nafion115/SiO2复合膜得到的电流密度是使用Nafion115膜电流密度的1.9倍。Silicon oxide/Nafion composite membranes were studied for operation in proton exchange membranes fuel cells(PEMFCs) at 110℃ and 130℃. The composite membranes were prepared by an impregnation of Nafion 115 via sol-gel processing of tetraethoxysilane. Tetraethoxysilane, when reacted with water in an acidic medium, undergoes polymerization to form a mixture of SiO2 and siloxane polymer with product hydroxide and ethoxide groups. At a potential of 0.7 V, silicon oxide/Nafion 115 composite membranes delivered 1.9 times the current density obtained with unmodified Nafion 115 in a PEMFC at 130 ℃ and a pressure of 0.25 MPa.

关 键 词：质子交换膜燃料电池 Nafion/SiO2复合膜 电池性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]