Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells
- Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells
- 송화섭; 이승호; 이대희; 김홍연; 현상훈; 김주선; 문주호
- SOFC; Durability; Solid oxide fuel cell composite cathode; Functionally-graded layer
- Issue Date
- Journal of power sources
- VOL 195, NO 9, 2628-2632
- A double-layer dual-composite cathode is fabricated and has an ideal cathode microstructure with large
electrochemical active sites and enhanced the durability in solid oxide fuel cells (SOFCs). The insertion of
a yttria-stabilized zirconia (YSZ)-rich functional layer between the electrolyte and the electrode allows
for a graded transition of the YSZ phase, which enhances ionic percolation and minimizes the thermal
expansion coefficient mismatch. Electrochemical measurements reveal that the double-layer composite
cathode exhibits improved cathodic performance and long-term stability compared with a single-layer
composite cathode. A cell with a well-controlled cathode maintains nearly constant interfacial polarization
resistance during an 80 h accelerated lifetime test.
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- KIST Publication > Article
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