A 3D PtCo degradation model for long-term performance prediction of a scaled-up PEMFC under constant voltage operation

Yang，Yunjie1; Bai，Minli1; Zhou，Zhifu2; Wu，Wei Tao3; Zhao，Jian4; Wei，Lei5; Li，Yang1; Li，Yubai1; Song，Yongchen1

2024-01-15

10.1016/j.enconman.2023.117918

Energy Conversion and Management   影响因子和分区

0196-8904

The non-uniform distribution of reactants, pressure, temperature and reaction rate in a scaled-up proton exchange membrane fuel cell (PEMFC) can lead to different catalyst degradation rate, impacting the long-term performance of PEMFCs. However, the local catalyst degradation behaviors in a PEMFC stack have not yet been fully understood due to the lack of experimental approaches and catalyst degradation model. In the present study, a numerical model is established for a 200 cm commercial-sized PEMFC stack with realistic anode and cathode flow fields. PtCo is employed as the cathode catalyst, and a 3D PtCo catalyst degradation model is developed to analyze the non-uniform evolution of the electrochemical active surface area (ECSA), current density, and Co in the catalyst layers under the constant voltage conditions. The modeling results demonstrated that catalyst degradation is more severe downstream as well as under land of the cathode flow field, and the cathode catalyst layer (CCL) is the area most contaminated by the Co. The non-uniform catalyst degradation as well as Co contamination increased the activation losses and local oxygen transport resistance. The catalyst degradation leads to a total power loss of 43.3 % after 80,000 h operation. The aging model provides a better understanding for large scale PEMFC stacks regarding its non-uniform PtCo degradation and can assist the future design of commercial PEMFCs with better lifetime.

Co2+ contamination Degradation model PEM fuel cells PtCo catalysts

SCI ; EI

英语

其他

ENGINEERING

2-s2.0-85181582642

Scopus

1.Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian University of Technology,Dalian,116024,China
2.State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China
3.School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China
4.Center for Advanced Vehicular Systems,Mississippi State University,Starkville,39762,United States
5.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Yunjie,Bai，Minli,Zhou，Zhifu,et al. A 3D PtCo degradation model for long-term performance prediction of a scaled-up PEMFC under constant voltage operation[J]. Energy Conversion and Management,2024,300.

Yang，Yunjie.,Bai，Minli.,Zhou，Zhifu.,Wu，Wei Tao.,Zhao，Jian.,...&Song，Yongchen.(2024).A 3D PtCo degradation model for long-term performance prediction of a scaled-up PEMFC under constant voltage operation.Energy Conversion and Management,300.

Yang，Yunjie,et al."A 3D PtCo degradation model for long-term performance prediction of a scaled-up PEMFC under constant voltage operation".Energy Conversion and Management 300(2024).