Stability of a Solid Oxide Cell Stack under Direct Internal-Reforming of Hydrogen-Blended Methane

Authors

Ya-Fei Tang, Key Laboratory of Advanced Fuel Cells and Electrolyzers cell Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China
An-Qi Wu, Key Laboratory of Advanced Fuel Cells and Electrolyzers cell Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China
Bei-Bei Han, Key Laboratory of Advanced Fuel Cells and Electrolyzers cell Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China
Hua Liu, Zhejiang Qiming Electric Power Group Co. Ltd, Zhoushan 316099, Zhejiang, China
Shan-Jun Bao, Zhejiang Qiming Electric Power Group Co. Ltd, Zhoushan 316099, Zhejiang, China
Wang-Lin Lin, Ocean Research Center of Zhoushan, Zhejiang University, Zhoushan 316021, Zhejiang, China
Ming Chen, Department of Energy Conversion and Storage, Technical University of Denmark (DTU), Lyngby, Denmark
Wan-Bing Guan, Key Laboratory of Advanced Fuel Cells and Electrolyzers cell Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, ChinaFollow
Subhash C. Singhal, Key Laboratory of Advanced Fuel Cells and Electrolyzers cell Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China

Corresponding Author

Wan-Bing Guan (wbguan@nimte.ac.cn)

Abstract

In this work, the long-term stability and degradation mechanism of a direct internal-reforming solid oxide fuel cell stack (IR-SOFC stack) using hydrogen-blended methane steam reforming were investigated. An overall degradation rate of 2.3%·kh^–1 was found after the stack was operated for 3000 hours, indicating a good long-term stability. However, the voltages of the two cells in the stack were increased at the rates of 3.38 mV·kh^–1 and 3.78 mV·kh^–1, while the area specific resistances of the three metal interconnects in the stack were increased to 0.276 Ω·cm², 0.254 Ω·cm² and 0.249 Ω·cm². The degradation of the stack might be caused by segregation of chromium on the surface of metal interconnects and the formation of SrCrO₄ insulating phase in the current collecting layer of the cathode, which result in an increase in the interfacial resistance and a decrease in the stack performance. The long-term performance of a flat-tube IR-SOFC stack could be further improved by suitably coating the metal interconnect surface. This work provides theoretical and experimental guideline for the application of hydrogen-blended methane steam reforming in flat-tube IR-SOFC stacks.

Graphical Abstract

Keywords

Hydrogen-blended methane steam; Internal-reforming; Stability; Solid oxide fuel cell stack

DOI Link

https://doi.org/10.13208/j.electrochem.2314001

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2024-01-28

Online Available Date

2023-11-15

Revised Date

2023-10-20

Received Date

2023-08-15

Recommended Citation

Ya-Fei Tang, An-Qi Wu, Bei-Bei Han, Hua Liu, Shan-Jun Bao, Wang-Lin Lin, Ming Chen, Wan-Bing Guan, Subhash C. Singhal. Stability of a Solid Oxide Cell Stack under Direct Internal-Reforming of Hydrogen-Blended Methane[J]. Journal of Electrochemistry, 2024 , 30(1): 2314001.
DOI: 10.13208/j.electrochem.2314001
Available at: https://jelectrochem.xmu.edu.cn/journal/vol30/iss1/4