直接甲醇燃料电池膜电极的活化工艺  

Activation technology of membrane electrode assembly for direct methanol fuel cell

作　　者：林才顺[1] 王新东[1] 张红飞[1] 王淑燕[1] 

机构地区：[1]北京科技大学物理化学系,北京100083

出　　处：《电源技术》2007年第7期554-555,561,共3页Chinese Journal of Power Sources

基　　金：国家"863"计划(2002AA302404);国家自然科学基金(50274010);教育部"新世纪优秀人才支持计划"(NCET-04-0103)

摘　　要：通过稳态电流-电压极化曲线法,研究了活化介质、活化时间和活化放电电流等活化工艺对直接甲醇燃料电池(DMFC)膜电极电化学性能的影响。研究结果表明,上述三个活化工艺对电池性能存在着明显的影响:在实验条件下,活化介质甲醇溶液优于去离子水;小电流活化优于大电流活化;活化的最佳时间为9h。在上述活化工艺条件和35℃的低温运行状态下,当DMFC膜电极的输出电压为0.247V时,其输出电流密度和峰值比功率分别可以达到160mA/cm2、39.5mW/cm2。Electrochemical performance of direct methanol fuel cell （DMFC） in various activation technologies such as medium of activation,time of activation and discharge current of activation were investigated by steady-state galvanostatic polarization. The experimental result shows that three activation technologies have effected the performance of direct methanol fuel cell significantly.In this experiment,methanol solution is a better medium of activation than distilled water, low current activation is better than high current activation ,the optimum time of activation is nine hours.When the working temperature is 35 ℃ and the output voltage is 0.247 V the output current density, power density are 160 mA/cm^2 and 39.5 mW/cm^2 ,respectively.

关 键 词：DMFC 膜电极 活化 电化学性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]