Abstract
LSCF powders with a specific surface area of 25.2 m2 g-1 and an average particle size of 89 nm are synthesized by the polymerizable complex method. The use of nanocrystalline LSCF powders allows the fabrication of an interlayer-free nanoporous cathode on top of an ScSZ electrolyte at a low temperature at which non-electrocatalytic secondary phases cannot form. The electrochemical performance of the interlayer-free cathode depends largely on the sintering temperature. A cathode sintered at below 750 °C lacks sufficient mechanical adhesion to the electrolyte, while the electrode surfaces are locally densified when sintered at above 800 °C. Impedance spectroscopy combined with microstructural evidence reveals that the optimum sintering temperature for LSCF is 750 °C. This avoids excess densification and grain growth, and results in the lowest polarization resistance (0.048 Ω cm2 at 750 °C).
| Original language | English |
|---|---|
| Pages (from-to) | 74-79 |
| Number of pages | 6 |
| Journal | Journal of Power Sources |
| Volume | 187 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
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Interlayer-free nanostructured La0.58Sr0.4Co0.2 Fe0.8O3-δ cathode on scandium stabilized zirconia electrolyte for intermediate-temperature solid oxide fuel cells. / Lee, Seungho; Song, Hwa Seob; Hyun, Sang Hoon; Kim, Joosun; Moon, Joo Ho.
In: Journal of Power Sources, Vol. 187, No. 1, 01.02.2009, p. 74-79.Research output: Contribution to journal › Article
TY - JOUR
T1 - Interlayer-free nanostructured La0.58Sr0.4Co0.2 Fe0.8O3-δ cathode on scandium stabilized zirconia electrolyte for intermediate-temperature solid oxide fuel cells
AU - Lee, Seungho
AU - Song, Hwa Seob
AU - Hyun, Sang Hoon
AU - Kim, Joosun
AU - Moon, Joo Ho
PY - 2009/2/1
Y1 - 2009/2/1
N2 - LSCF powders with a specific surface area of 25.2 m2 g-1 and an average particle size of 89 nm are synthesized by the polymerizable complex method. The use of nanocrystalline LSCF powders allows the fabrication of an interlayer-free nanoporous cathode on top of an ScSZ electrolyte at a low temperature at which non-electrocatalytic secondary phases cannot form. The electrochemical performance of the interlayer-free cathode depends largely on the sintering temperature. A cathode sintered at below 750 °C lacks sufficient mechanical adhesion to the electrolyte, while the electrode surfaces are locally densified when sintered at above 800 °C. Impedance spectroscopy combined with microstructural evidence reveals that the optimum sintering temperature for LSCF is 750 °C. This avoids excess densification and grain growth, and results in the lowest polarization resistance (0.048 Ω cm2 at 750 °C).
AB - LSCF powders with a specific surface area of 25.2 m2 g-1 and an average particle size of 89 nm are synthesized by the polymerizable complex method. The use of nanocrystalline LSCF powders allows the fabrication of an interlayer-free nanoporous cathode on top of an ScSZ electrolyte at a low temperature at which non-electrocatalytic secondary phases cannot form. The electrochemical performance of the interlayer-free cathode depends largely on the sintering temperature. A cathode sintered at below 750 °C lacks sufficient mechanical adhesion to the electrolyte, while the electrode surfaces are locally densified when sintered at above 800 °C. Impedance spectroscopy combined with microstructural evidence reveals that the optimum sintering temperature for LSCF is 750 °C. This avoids excess densification and grain growth, and results in the lowest polarization resistance (0.048 Ω cm2 at 750 °C).
UR - http://www.scopus.com/inward/record.url?scp=58149145460&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58149145460&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2008.10.101
DO - 10.1016/j.jpowsour.2008.10.101
M3 - Article
VL - 187
SP - 74
EP - 79
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1
ER -