碳纤维基PtSn催化剂直接乙醇燃料电池制备及性能研究

摘要

采用自制的碳纤维基PtSn催化剂薄膜作为阳极催化剂,商用Pt/C作为阴极催化剂,Nafion 115膜作为质子交换膜,通过热压制成膜电极,组装平板型直接乙醇燃料单电池,搭建测试系统并进行性能的测试,研究了温度、乙醇浓度、溶液流量、进气流量等参数对DEFC的影响.结果表明,当乙醇溶液浓度为1.0 mol/L、溶液进样流量为1.0 mL/min、溶液温度为80℃、氧气进样流量为100 mL/min时结果较优,单电池的最高功率密度达18.2 mW/cm2.%PtSn anode catalyst supported on carbon fiber was taken as the anode catalyst of the ME A. Commercial Pt/C catalyst was used in MEA as the cathode catalyst. The Nafion 115 membrane was the proton exchange membrane of the MEA. MEA was fabricated by hot-pressing. The sing flat cell was assembled with the prepared MEA. The influences of temperature, ethanol concentration, rates of liquor and O2 were studied. The results showed that the performance of the fuel was better when the concentration of ethanol was 1. 0 mol/L, the rate of liquor was 1. 0 mL/min, the temperature was 80℃, and the rate of O2 was 100 mL/min, the maximum power density of the fuel reached about 18.2 mW/cra2.