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Anode-Supported Planar Solid Oxide Fuel Cells Based on Double-sided Cathodes
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DOI：10.1002/ente.201800743.png)
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Planar solid oxide fuel cells (SOFCs) have been extensively studied during the past few decades, particularly the anode supported SOFC. In traditional electrode-supported cells, the mismatch of coefficients of thermal expansion between materials in each layer may give rise to thermal stresses during operation, resulting in micro-cracks of ultra-thin electrolytes, which may ultimately lead to operational damages and performance degradation. This work proposes a new symmetric, planar SOFC design based on double-sided cathodes to offset asymmetry of thermal stresses within the structure. This new design has been applied to prepare an anode-supported SOFC that maintains integrity after two complete redox cycles. Its anti-fracture load is 20 times stronger than that of traditional ultra-thin cells, and its electrochemical performance is close to that of traditional large-scale, ultra-thin cells. These properties are promising for application under harsh operational environments.
Keyword:
anode-supported
planar solid oxide fuel cells
double-sided
hollow-structured
traditional ultra-thin
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