直接甲醇燃料电池用磺化聚醚醚酮基复合膜  

Composite membranes based on sulfonated poly (ether ether ketone) for direct methanol fuel cell

作　　者：张宏伟[1] 张俊[1] 周震涛[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《电源技术》2009年第1期14-16,共3页Chinese Journal of Power Sources

基　　金：广州市科学技术局攻关项目(2006Z3-D0181)资助

摘　　要：磺化聚醚醚酮(SPEEK)用N,N'-羰基二咪唑和氨基丙基三乙氧基硅烷进行预处理后,与原硅酸四乙酯和经三乙醇胺溶液处理过的α-磷酸氢锆由sol-gel法制得有机/无机复合膜,并对其进行了傅里叶变换红外光谱(FTIR)、表面形貌、甲醇透过性和DMFC极化曲线的研究。复合膜有比SPEEK膜低的甲醇渗透系数和溶胀,由复合膜组装的直接甲醇燃料电池有比Nafion117膜高的开路电压,最高比功率达到15mW/cm2。Sulfonated poly（ether ether ketone）s （SPEEKs） were pretreated with 1,1＇-carbonyl-diimidazole （CDI） and aminopropylsilane （AS）, firstly. Then SiO2 from tetraethoxysilane （TEOS） was inducted to form covalent bond with the matrix of SPEEK through the sol-gel process to improve composite membranes＇ swelling erformance. On the other hand, （x-zirconium phosphate （ZrP） was exfoliated through the pretreatment of amine solution and then the modified ZrP also was incorporated into the above SPEEK matrix to maintain composite membranes＇ high conductivity. At last the SPEEK/SiO2/ZrP composite membranes were prepared. Fourier transform infrared spectroscopy （FT-IR） shows that crosslinked network structure has formed in the composite membrane. The SPEEK/SiO2/ZrP composite membranes showed a methanol permeability of 2.4 × 10^-7 cm^2/s at 40 ℃, lower than that of the SPEEK and Nation117 membrane. The DMFC single cell assembled by the SPEEK/SiO2/ZrP membrane had the highest OCV of 0.552 V, and its power density reached 15 mW/cm^2 when the current density was 88 mA/cm^2.

关 键 词：磺化聚醚醚酮 质子交换膜 直接甲醇燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]