An Electrochemical Investigation of Methanol Crossover in Direct Methanol Fuel Cells

Abstract

直接甲醇燃料电池(DMFC)具有能量密度高、安全、无污染等优点,是近年来新开发的一类燃料电池。甲醇来源丰富,价格便宜,易于存储,是便携式电子设备和电动汽车的理想动力源。然而,甲醇渗透造成电池性能衰退,是阻碍DMFC商业化的主要问题之一。因此,开展甲醇渗透的研究工作,建立适宜的表征方法,对阐明甲醇渗透和阻醇机理,推进DMFC的商业化进程有着重大的理论指导意义和实际应用价值。本论文工作的主要思路是通过考察不同条件下甲醇的电氧化行为,获得甲醇电氧化的动力学参数及影响因素,并利用甲醇电氧化来研究甲醇渗透行为和操作条件对甲醇渗透的影响。因此,采用循环伏安和计时电流测试技术考察了甲醇浓度、扫描速度、温度等...Direct methanol fuel cell (DMFC) has advantages of high power density, safety , low or zero emission and has been developed in recent years. Using methanol as a fuel,it is inexpensive, obtainable , convenient to carry and store. DMFC has become one of the most promising candidates as power sources in portable electronic products and electric vehicles. However, the degradation of cell performance d...学位:理学硕士院系专业:化学化工学院化学系_物理化学(含化学物理)学号:20032510

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