New insights into the performance and durability degradation mechanisms of PEMFCs caused by Cr3+ contaminant

Chen，Huibing1,2; Liu，Haijun1,2; Chen，Ming3; Wang，Haijiang2

2024-06-01

10.1016/j.fuel.2024.131253

Fuel   影响因子和分区

0016-2361

It is known that contamination ions stemming from the corrosive deterioration of vital subassemblies, such as bipolar plates (BPs) and sealing gaskets, exert a profound influence on the performance and durability degradation of PEM fuel cells. The impacts of Cr on the catalyst layers (CLs) and single-cell performance were investigated by immersing the cathode catalyst layer (CCL) and anode catalyst layer (ACL) in a Cr solution with different concentrations for contamination treatment. During the fuel cell test, polarization curves (PCs), electrochemical impedance spectroscopy (EIS), H transfer impedance, and cyclic voltammetry (CV) curve results were recorded. The effects of Cr contamination on the kinetic for oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) were analyzed in a three-electrode system. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to explore the degradation mechanisms of Cr contamination on fuel cell activity. The results indicate that the presence of Cr increased the ohmic impedance from 0.200 Ω cm to 0.449 Ω cm, resulting in a voltage attenuation rate as high as 55.21 %. Moreover, the presence of Cr slowed the ORR reaction rate and changed the ORR reaction pathway. Cr contamination caused irreversible damage to PEMFC performance and durability.

Cr3+ contamination Degradation mechanism Migration across PEM PEM fuel cells Performance and durability

SCI ; EI

英语

通讯

ENGINEERING

2-s2.0-85186123863

Scopus

1.Harbin Institute of Technology,Harbin,150001,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Hydrogen Energy R&D Department,PetroChina Shenzhen New Energy Research Institute,Shenzhen,518054,China

Chen，Huibing,Liu，Haijun,Chen，Ming,et al. New insights into the performance and durability degradation mechanisms of PEMFCs caused by Cr3+ contaminant[J]. Fuel,2024,365.

Chen，Huibing,Liu，Haijun,Chen，Ming,&Wang，Haijiang.(2024).New insights into the performance and durability degradation mechanisms of PEMFCs caused by Cr3+ contaminant.Fuel,365.

Chen，Huibing,et al."New insights into the performance and durability degradation mechanisms of PEMFCs caused by Cr3+ contaminant".Fuel 365(2024).