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AC Impedance Spectroscopy in DMFC Diagnosis

Qi Liang Xie Xiaofeng~(**) Jin Baoduo Guo Jianwei Xu Jingming(Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)  
Because the AC impedance spectroscopy,also called as electrochemical impedance spectroscopy(EIS),can provide more detailed information than other impedance measurement methods,it becomes the most popular method for the research on the fuel cells.The paper mainly deals with all the aspects of application in DMFC field including in-situ polarization analysis,reaction mechanism details,material performance evaluation,etc.Several key technical problems about EIS including electrochemical system establishment,the reference electrode selection,the equivalent-circuits model for analysis are discussed.
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