Synthesis and Applications for High-Temperature Fuel Cells of Anhydride Proton Conducting Polymers

1. 合成了含氨基烃基聚合物电解质的无水质子导电聚合物。建立了在聚砜和聚苯衍生物中引入氨基的方法，制备了几种碱性聚合物电解质。通过对碱性聚合物电解质中磷酸掺杂的研究，得到了酸碱络合型电解质。采用酸碱络合型电解质制备的高温PEFC可在120 ~ 160℃工作，功率密度可达200 mWcm^<-2>。研究了其他酸性物质掺杂的新方法。高温pefc技术的发展我们在2005年研究了高温pefc的一个重要课题——催化层。制备了Nafion溶液、Nafion/磷酸配合物、聚苯并咪唑/磷酸配合物、磺化富勒烯、磺化导电聚合物作为催化层的粘结材料，并用这些粘结材料制备了膜电极组件（MEA）。高温PEFC操作试验结果表明，Nafion/磷酸配合物是最合适的粘结剂。此外，这些粘结剂材料被用于常规的PEFC测试。实验数据表明，磺化富勒烯粘结剂的性能优于其他粘结剂。这种效应可能是由于磺化富勒烯粘结剂中的无水质子传导。磺化富勒烯粘合剂在PEFC耐久性试验中也表现出自由基猝灭效应。

1. Development of Anhydrous Proton Conducting PolymersHydrocarbon based polymer electrolytes with amino groups were synthesized. We established a method that was the introduction of amino groups to polysulfone and polyphenylene derivatives and prepared several kinds of basic polymer electrolytes. The acid-base complex type electrolytes were obtained by investigating the phosphoric acid doping to the basic polymer electrolytes. The high-temperature PEFC with these acid-base complex type electrolytes could be operated at 120-160℃ and exhibited high power density of 200 mWcm^<-2>. New doping methods with other acid materials were also examined.2. Development of Technology for High-Temperature PEFCWe investigated the catalytic layer that was a very important subject for high-temperature PEFCs on 2005. Nafion solution, Nafion/phosphoric acid complex, polybenzimidazole/phosphoric acid complex, sulfonated fullerene, sulfonated conducting polymers were prepared as the binder material for the catalytic layer, and membrane-electrode assemblies (MEA) were fabricated with these binder materials. The result of high-temperature PEFC operation tests showed that the Nafion/phosphoric acid complex was the most suitable binder compared with the others. In addition, these binder materials were utilized for conventional PEFC tests. The experimental data suggested that the sulfonated fullerene binder had better performance than those of the other binders. This effect may be due to the anhydrous proton conduction in the sulfonated fullerene binder. The sulfonated fullerene binder also exhibited a radical quench effect on the PEFC durability tests.