Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells

Title
Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells
Authors
송화섭이승호이대희김홍연현상훈김주선문주호
Keywords
SOFC; Durability; Solid oxide fuel cell composite cathode; Functionally-graded layer
Issue Date
2010-01
Publisher
Journal of power sources
Citation
VOL 195, NO 9, 2628-2632
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/37086
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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