Journal
JOURNAL OF POWER SOURCES
Volume 453, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.227848
Keywords
Methane-fueled SOFCs; Methane conversion efficiency; Gas diffusion; Anode supports; Microchannel structure
Funding
- University of Jinan
- National Natural Science Foundation of China [51872123]
- Natural Science Foundation of Shandong Province [ZR2017MEM022]
- Shandong Province Key Research and Development Program [2018GGX102037]
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Methane-fueled solid oxide fuel cells (SOFCs) are promising to achieve high energy conversion efficiency while no study focuses on the conversion efficiency of methane into power, which is greatly restrained by gas diffusion within anode supports. This study employs microchanneled anode supports to provide fast gas diffusion pathway. To confirm the advantage, the anodes with half-channels and without channels are also used for comparison. The microchannel structure increases the maximum power density up to 2.5 times because of diminishing or eliminating concentration polarization within anode supports and improving catalyst coating over anode internal surface. As a compromise of fuel utilization and power output, methane conversion efficiency is defined as power output per mol methane input in feeding gas to compare with the reported results, and the microchanneled SOFCs achieve the record high methane conversion efficiency.
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