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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
Published on: September 20, 2012
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High performance anode-supported tubular solid oxide fuel cells fabricated by a novel slurry-casting method
Nan-Qi Duan1, Dong Yan1, Bo Chi1
1Center for Fuel Cell Innovation, State Key Laboratory of Coal Combustion, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
Scientific Reports
|February 3, 2015
Summary
This study fabricated tubular solid oxide fuel cells (SOFCs) with enhanced performance using palladium oxide (PdO) impregnation. While initial power density significantly increased, long-term testing revealed performance degradation due to PdO particle growth.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Conversion
Background:
- Solid oxide fuel cells (SOFCs) are promising for clean energy generation.
- Tubular SOFC designs offer advantages in fabrication and scalability.
- Improving the electrochemical performance and long-term stability of SOFCs is crucial for commercialization.
Purpose of the Study:
- To fabricate and evaluate tubular solid oxide fuel cells.
- To investigate the effect of palladium oxide (PdO) impregnation on electrochemical performance.
- To assess the long-term stability and degradation mechanisms of PdO-impregnated SOFCs.
Main Methods:
- Fabrication of tubular SOFCs using NiO-YSZ anode, YSZ electrolyte, and LSM-YSZ cathode via casting, dip-coating, and sintering.
- Electrochemical performance testing at temperatures ranging from 650 to 850°C.
- PdO impregnation into the cathode to enhance performance.
- Long-term durability testing at 750°C and 0.7 A cm⁻² for 282 hours.
Main Results:
- Tubular SOFCs achieved peak power densities between 85-522 mW cm⁻² without impregnation.
- PdO impregnation significantly enhanced peak power density to 308-1220 mW cm⁻².
- Long-term testing showed PdO particle coalescence, leading to increased cathode polarization resistance and performance degradation.
Conclusions:
- PdO impregnation is an effective method for boosting the power density of tubular SOFCs.
- The observed degradation mechanism highlights the need for strategies to mitigate PdO particle growth during operation.
- Further research is needed to ensure long-term stability for practical applications.
