Volume 31: Clean Energy Technologies towards Carbon Neutrality

Measurement and analysis on variable parameters of in-plane segment electrochemical impedance spectroscopy of polymer electrolyte membrane fuel cell Xiangfeng Wu1 , Xuezhe Wei, Haifeng Dai, Xueyuan Wang, Hao Yuan

Abstract

In the study of in-plane segment electrochemical impedance spectroscopy (EIS) distribution of polymer electrolyte membrane fuel cells, it is necessary to use effective data analysis methods to fit the segment test results, so as to quantify and compare the polarization process between the segments at different frequencies. Further, more information about the electrochemical reaction behavior inside the cell can be obtained, which is helpful to further analyze the complex multi-domain and multi-scale change process inside the fuel cell. Therefore, on the basis of using the FFT algorithm of MATLAB software to successfully obtain the in-plane segment EIS distribution, the equivalent circuit model (ECM) and the control parameter variable method can be used to further explore the corresponding changes between in-plane EIS. Using this analytical method, the difference in EIS between in-plane segments was quantified and compared under the condition of setting variable cell temperature.

Keywords polymer electrolyte membrane fuel cell, in-plane segment electrochemical impedance spectroscopy, equivalent circuit model, variable parameters measurement