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Dynamic current cycles effect on the degradation characteristic of a H2/O2 proton exchange membrane fuel cell by Kai Meng; Haoran Zhou; Ben Chen; Zhengkai Tu is a Engineering article available to read on EtoBox.

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The durability and reliability of H 2 /O 2 proton exchange membrane fuel cell (PEMFC) is a key factor that prevents its wide application in the civil field. PEMFC inevitably experience different dynamic loading cycles according to different power switching requirements during practical operation. To explore the degradation behavior under different dynamic cycles, a single H 2 /O 2 PEMFC with 50 cm 2 active area was operated under the circulating current density from 100 mAcm À2 to 600 mAcm À2 , 100 mAcm À2 to 800 mAcm À2 , and 100 mAcm À2 to 1000 mAcm À2 , respectively. The change of polarization curve, performance degradation at different current density, Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) were characterized to investigate the performance degradation over dynamic current cycles. Besides, the Scanning Electron Microscopy (SEM) was used to evaluate the degradation of catalyst layer. The results indicated that the degradation rate of the fuel cell performance increased corresponding to the cycle number, at 1200 mA/cm 2 , it with a total performance degradation rate of 11.83% after 2000 dynamic loading cycles with the circulating current density from

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Author

Kai Meng; Haoran Zhou; Ben Chen; Zhengkai Tu

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)