Diagnostic of Flooding and Hysteresis Phenomena for Proton Exchange Membrane Fuel Cell using Cyclo-Voltammogram Simulation  

作　　者：Der-Sheng Chan Kan-Lin Hsueh 

机构地区：[1]Department of Chemical and Materials Engineering, Lee-Ming Institute of Technology, New Taipei City, Taiwan [2]Department of Energy and Resources, National United University, Miaoli, Taiwan

出　　处：《Journal of Chemistry and Chemical Engineering》2011年第10期863-872,共10页化学与化工（英文版）

摘　　要：Porous electrodes with three-phase reaction in low temperature fuel cells have attracted much attention by their flooding phenomena. In order to have a better understanding of the flooding phenomena inside electrode, it is important to evaluate various discharge conditions of the flooded electrodes. A model of flooded porous electrode under the influence of potential sweep was developed to evaluate the flooding conditions in-situ. The hysteresis of current density vs. time was observed at high sweep rates （1 O0 mV.sl）. It was not observed at low sweep rate （0.1 mV-s~）. In this study, these characteristics of flooding and hysteresis conditions were found to be markedly dependent on the potential scan rate. These dynamic behaviors are interpreted in terms of water saturation response, velocity of water movement, and evaporation rate of water.

关 键 词：Transient model cathode flooding fuel cell linear potential scanning 

分 类 号：TP334.22[自动化与计算机技术—计算机系统结构] TN915.05[自动化与计算机技术—计算机科学与技术]