Investigation of Pt/CNT-Based Electrodes in Proton Exchange Membrane Fuel Cells Using AC Impedance Spectroscopy

2010 ◽  
Vol 157 (6) ◽  
pp. B868 ◽  
Author(s):  
Zhe Tang ◽  
Daniel H. C. Chua
Keyword(s):  
Fuel Cells ◽  
Impedance Spectroscopy ◽  
Proton Exchange Membrane ◽  
Ac Impedance ◽  
Proton Exchange ◽  
Ac Impedance Spectroscopy ◽  
Exchange Membrane

Ac Impedance Spectroscopy Study of Modified Proton-Exchange Membrane Nanocomposites

2002 ◽  
Vol 733 ◽  
Author(s):  
Françoise Damay ◽  
Lisa C. Klein
Keyword(s):  
Impedance Spectroscopy ◽  
Proton Exchange Membrane ◽  
Composite Membranes ◽  
Ac Impedance ◽  
Proton Exchange ◽  
Ac Impedance Spectroscopy ◽  
Proton Mobility ◽  
Fuel Cell Performance ◽  
Impedance Spectroscopy Study ◽  
Exchange Membrane

AbstractThe dielectric and electrical behaviors of a NafionTM membrane, a NafionTM/7SiO2-2P2O5-ZrO2 gel composite, and a NafionTM/ZrP particle composite were investigated using ac impedance spectroscopy at different relative humidities and temperatures. Only NafionTM/7SiO2-2P2O5-ZrO2 showed a slightly higher conductivity than NafionTM at high temperature. For NafionTM/ZrP, proton mobility was significantly lower, particularly at high relative humidity. The results suggest that improvement in fuel cell performance, previously measured on composite membranes, does not merely result from increased hydrophilic properties.

scholarly journals A Comparative Study of Equivalent Circuit Models for Electro-Chemical Impedance Spectroscopy Analysis of Proton Exchange Membrane Fuel Cells

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 386
Author(s):  
Lei Zhao ◽  
Haifeng Dai ◽  
Fenglai Pei ◽  
Pingwen Ming ◽  
Xuezhe Wei ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Equivalent Circuit ◽  
Goodness Of Fit ◽  
Proton Exchange Membrane ◽  
Electrochemical Impedance ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Fitting Accuracy

Electrochemical impedance spectroscopy is one of the important tools for the performance analysis and diagnosis of proton exchange membrane fuel cells. The equivalent circuit model is an effective method for electrochemical impedance spectroscopy resolution. In this paper, four typical equivalent circuit models are selected to comprehensively compare and analyze the difference in the fitting results of the models for the electrochemical impedance spectroscopy under different working conditions (inlet pressure, stoichiometry, and humidity) from the perspective of the fitting accuracy, change trend of the model parameters, and the goodness of fit. The results show that the fitting accuracy of the model with the Warburg element is the best for all under each working condition. When considering the goodness of fit, the model with constant phase components is the best choice for fitting electrochemical impedance spectroscopy under different inlet pressure and air stoichiometry. However, under different air humidity, the model with the Warburg element is best. This work can help to promote the development of internal state analysis, estimation, and diagnosis of the fuel cell based on the equivalent circuit modeling of electrochemical impedance spectroscopy.

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