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Performance enhancement of multi-gas compatible dual-channel interconnector for planar solid oxide fuel cells

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  • Li, Haolong
  • Zhang, Tuo
  • Wei, Wei
  • Liu, Fengxia
  • Xu, Xiaofei
  • Li, Zhiyi
  • Liu, Zhijun

Abstract

This study designed a novel interconnector, known as the dual-channel interconnector (DCI), for the anode-supported planar solid oxide fuel cell (SOFC). The DCI have two independent flow channels and allow multiple gases to enter SOFC simultaneously without interference. The DCI has half the height of a conventional interconnector. The electrochemical reaction of carbon monoxide and hydrogen as well as the methane steam reforming reaction, water gas shift reaction and dry reforming reaction of methane were coupled in the mathematical models. Results show that the peak power densities of the DCI-SOFC increased by 21.7% and 11.3% compared to the SCI–SOFC for wet hydrogen and 30% reformed methane when both channels are utilized together. The DCI-SOFC exhibits similar electrical performance in any single-channel operation, accompanied by a 30% decrease in peak power density. The DCI-SOFC can significantly reduce the activation overpotential and concentration overpotential, while slightly increase the contact overpotential. The DCI eliminates the oxygen-free zone under the ribs and enhances the mass transfer inside the electrodes. The temperature inside of the DCI-SOFCs are strongly correlated with the gas composition and the flow direction. Overall, the DCI for SOFC is a promising design.

Suggested Citation

  • Li, Haolong & Zhang, Tuo & Wei, Wei & Liu, Fengxia & Xu, Xiaofei & Li, Zhiyi & Liu, Zhijun, 2023. "Performance enhancement of multi-gas compatible dual-channel interconnector for planar solid oxide fuel cells," Energy, Elsevier, vol. 283(C).
    • Handle: RePEc:eee:energy:v:283:y:2023:i:c:s0360544223023307
    DOI: 10.1016/j.energy.2023.128936
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    3. Wang, Rongxuan & Wang, Bowen & Wang, Yang & Lai, Yanchen & Du, Qing & Jiao, Kui, 2025. "A gradient channel-width flow field for temperature uniformity enhancement in ammonia fueled solid oxide fuel cell," Energy, Elsevier, vol. 329(C).

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