Compositional influence of LSM-YSZ composite cathodes on improved performance and durability of solid oxide fuel cells

Title
Compositional influence of LSM-YSZ composite cathodes on improved performance and durability of solid oxide fuel cells
Authors
송화섭이승호현상훈김주선문주호
Keywords
Solid Oxide Fuel Cell; Composite Cathode; Durability; Dual composite
Issue Date
2009-01
Publisher
Journal of power sources
Citation
VOL 187, 25-31
Abstract
The use of a dual-composite approach, in which both LSM and YSZ nanoparticles are placed on YSZ core particles, allows for the development of an ideal cathode microstructure with improved phase contiguity and durability for use in solid oxide fuel cells. The volume fraction of the conjugated YSZ phase plays a critical role in the optimization of the cathode microstructure for achieving good durability because it acts as an interconnecting bridge between YSZ core particles. However, the presence of excess conjugated YSZ phase interrupts the formation of sufficient triple phase boundary sites by disturbing the contacts between the LSM and YSZ phases. Impedance spectroscopy analysis and microstructural observations provide a better understanding of the influence of the composition on the electrochemical performance and durability of these dual composite cathodes.
URI
http://pubs.kist.re.kr/handle/201004/34856
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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