Numerical analysis of the electrochemical impedance spectra of the cathode of direct methanol fuel cells
作者： M CHEN , C DU , G YIN , P SHI , T ZHAO
DOI: 10.1016/J.IJHYDENE.2008.11.072
关键词:
摘要: A mathematical model is developed to simulate the electrochemical impedance spectra (EIS) of cathode a direct methanol fuel cell (DMFC) based on electrode kinetics and mass transports. Successful simulation confirms usefulness as diagnostic tool for interpreting characteristics cathode. Numerically, capacitive semicircle in pattern ascribed charge transfer process inductive mainly due CO adsorption relaxation. Results show that strongly dependent potential, which can be used criterion judging relative effect permeation Another appears resistance changed when oxygen transport limited. The effects are also delineated, indicating often leads larger DMFC depends rate.
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