气体多孔电极反应微观机理及宏观现象的研究  

Research on the Microscopic Mechanism and Microscopic Phenomena of the Gas Porous Electrode Reaction

作　　者：朱梅[1] 徐献芝[1] 杨基明[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,合肥230027

出　　处：《中国工程科学》2005年第5期79-83,共5页Strategic Study of CAE

基　　金：国家自然科学基金资助项目(10272100)

摘　　要：提出多孔电极研究的新思路、新方法,探索电极反应的微观机理及宏观现象,试图为制造高效多孔电极提供理论参考。通过锌空气电池实验对比了立式多孔碳电极相对于传统多孔碳电极在放电中的优点。通过实验观察了三相界面的形成形态随时间变化的3个宏观过程,根据3个宏观过程对应的电化学过程定义了电极反应中所形成的2种有代表性的三相界面。分析了电解液在多孔电极中运动的微观机理并得出理想突变界面是气体电极的最佳工作状态的结论。In order to get the theoretical reference for making high efficiency porous electrode, microscopic mechanism and macroscopic phenomena of the porous electrode reaction were explored by new ideas and new methods. The superiority of the vertical porous gas electrode to the traditional electrode was proved by the zinc-air battery discharge experiment. By the experiment, three macroscopic time-varied courses of the three-phase interface's shape variation were observed. According to electrochemical processes corresponding to the three macroscopic courses, two kinds of typical three-phase interface formed in the electrode reaction were defined. The microscopic mechanism of the electrolyte movement in the porous electrode was analyzed. It was concluded that the ideal discontinuity interface is the optimal active state of the gas porous electrode.

关 键 词：多孔电极 三相界面 锌空气电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]