STUDY ON EFFECT OF VARIABLE OPERATING CONDITIONS ON FLOODING OF PEMFC

Xiao Fei; Chen Tao; Lan Yang; Chen Ziyu

doi:10.19912/j.0254-0096.tynxb.2023-1762

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (3) : 100-107. DOI: 10.19912/j.0254-0096.tynxb.2023-1762

STUDY ON EFFECT OF VARIABLE OPERATING CONDITIONS ON FLOODING OF PEMFC

Xiao Fei, Chen Tao, Lan Yang, Chen Ziyu

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Abstract

To investigate the influence of variable operating conditions on the flooding faults of proton exchange membrane fuel cell （PEMFC）, multiple flooding control experiments were conducted by combining voltage monitoring and electrochemical impedance spectroscopy （EIS） dynamic measurements. Then, the EIS measurements were parameterized using the proposed RL（RQ-RC） equivalent circuit model to obtain the fitted values of ohmic impedance, charge transfer impedance and mass transfer impedance. Finally, the effect of different operating conditions on flooding faults were studied by analyzing the trend of voltage change and the variation laws of impedance. The experimental results show that the charge transfer impedance and mass transfer impedance gradually increased with the degree of flooding, in which the increase of mass transfer impedance was more significant. Increasing the cathode stoichiometric ratio and outlet back-pressure could alleviate the flooding phenomenon,and the higher the current density, the more easily to cause severe flooding.

Key words

proton exchange membrane fuel cell / floods / voltage / electrochemical impedance spectroscopy / operating conditions

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Xiao Fei, Chen Tao, Lan Yang, Chen Ziyu. STUDY ON EFFECT OF VARIABLE OPERATING CONDITIONS ON FLOODING OF PEMFC[J]. Acta Energiae Solaris Sinica. 2025, 46(3): 100-107 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1762

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