中文摘要：

以Pt—Ru／c和Pt／C分别为阳极、阴极催化剂，自制了膜电极，并组装了直接甲醇燃料电池（DMFC）以及测试系统．通过稳态电流-电压极化曲线法，研究了甲醇流量、甲醇浓度、甲醇温度以及空气增湿温度对DMFC电化学性能的影响．研究结果表明。在电池温度为25℃以及阴极为自然空气的条件下，当DMFC输出电压为0．22V时，其输出电流密度和峰值功率密度分别可以达到68mA·cm^-2和14．8mw·cm^-2，且各因素对电池性能存在着明显的影响．实验的最佳运行工艺参数：甲醇流量为2mL·min^-1，甲醇浓度为2mol·L^-1，甲醇温度为30℃，空气增湿温度为40～60℃．

英文摘要：

Using Pt-Ru/C and Pt/C as anode and cathode catalysts, the membrane electrode assembly was prepared and a single direct methanol fuel cell system was installed. The electrochemical performance of a direct methanol fuel cell （DMFC） at different technological parameters such as methanol flow, methanol concentration, methanol temperature and humidifying air temperature was investigated by means of steady-state galvanostatic and potentiostatic polarization. The experimental result shows that the output current density and power density were 68 mA·cm^-2 and 14.8 mW·cm^-2 respectively with ambient air as cathode oxidant when the working temperature was 25℃ and the output voltage was 0.22 V. The four technological parameters significantly affected the performance of a direct methanol fuel cell. In the experiment, the optimum technological parameters were the methanol flow of 2 mL·min^- 1, the methanol concentration of 2 mol· L^ - 1, the methanol temperature of 30℃ and the humidifying air temperature of 40～60℃.