Durable high-performance Sm0.5Sr0.5CoO 3-Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells

Daehee Lee, Inyong Jung, Seong Oh Lee, Sang Hoon Hyun, Jae Hyuk Jang, Joo Ho Moon

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Sm0.5Sr0.5CoO3 (SSC)-Sm 0.2Ce0.8O1.9 (SDC) core-shell composite cathodes are synthesized via a polymerizable complex method, and the durability of a cell incorporating the cathodes is examined. Nanocrystalline SSC powders have been coated onto the surfaces of SDC cores to enable the formation of a rigid backbone structure, over which the catalyst phase is effectively dispersed. A symmetrical SSC-SDC SDC SSC-SDC half-cell exhibits a polarization resistance of 0.098 Ω cm2 at 650 °C. The durability and microstructure of the cathode are investigated by electrochemical impedance spectroscopy and thermo-cycle tests at temperatures in the range of 100 °C-650 °C. After 30 cycles, the polarization resistance is found to increase by 9.04 × 10-2 Ω cm2, a 3.56% rise with respect to the initial resistance. Coarsening of the SSC catalyst phase has been prevented with the use of core-shell type powders, as confirmed by a nearly constant low frequency polarization resistance and a microstructural analysis. The performance of a unit cell comprised of the core-shell type cathode exhibits 1.07 W cm-2 at 600 °C and 0.62 W cm-2 at 550 °C.

Original languageEnglish
Pages (from-to)6875-6881
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number11
DOIs
Publication statusPublished - 2011 May 1

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Cathodes
cathodes
composite materials
Composite materials
Polarization
durability
Durability
polarization
cells
Rigid structures
Nanocrystalline powders
catalysts
Temperature
cycles
Catalysts
Coarsening
rigid structures
Electrochemical impedance spectroscopy

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Lee, Daehee ; Jung, Inyong ; Lee, Seong Oh ; Hyun, Sang Hoon ; Jang, Jae Hyuk ; Moon, Joo Ho. / Durable high-performance Sm0.5Sr0.5CoO 3-Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells. In: International Journal of Hydrogen Energy. 2011 ; Vol. 36, No. 11. pp. 6875-6881.
@article{d8351f78b8f849ef900cf1383537c4f5,
title = "Durable high-performance Sm0.5Sr0.5CoO 3-Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells",
abstract = "Sm0.5Sr0.5CoO3 (SSC)-Sm 0.2Ce0.8O1.9 (SDC) core-shell composite cathodes are synthesized via a polymerizable complex method, and the durability of a cell incorporating the cathodes is examined. Nanocrystalline SSC powders have been coated onto the surfaces of SDC cores to enable the formation of a rigid backbone structure, over which the catalyst phase is effectively dispersed. A symmetrical SSC-SDC SDC SSC-SDC half-cell exhibits a polarization resistance of 0.098 Ω cm2 at 650 °C. The durability and microstructure of the cathode are investigated by electrochemical impedance spectroscopy and thermo-cycle tests at temperatures in the range of 100 °C-650 °C. After 30 cycles, the polarization resistance is found to increase by 9.04 × 10-2 Ω cm2, a 3.56{\%} rise with respect to the initial resistance. Coarsening of the SSC catalyst phase has been prevented with the use of core-shell type powders, as confirmed by a nearly constant low frequency polarization resistance and a microstructural analysis. The performance of a unit cell comprised of the core-shell type cathode exhibits 1.07 W cm-2 at 600 °C and 0.62 W cm-2 at 550 °C.",
author = "Daehee Lee and Inyong Jung and Lee, {Seong Oh} and Hyun, {Sang Hoon} and Jang, {Jae Hyuk} and Moon, {Joo Ho}",
year = "2011",
month = "5",
day = "1",
doi = "10.1016/j.ijhydene.2011.02.093",
language = "English",
volume = "36",
pages = "6875--6881",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",
number = "11",

}

Durable high-performance Sm0.5Sr0.5CoO 3-Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells. / Lee, Daehee; Jung, Inyong; Lee, Seong Oh; Hyun, Sang Hoon; Jang, Jae Hyuk; Moon, Joo Ho.

In: International Journal of Hydrogen Energy, Vol. 36, No. 11, 01.05.2011, p. 6875-6881.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Durable high-performance Sm0.5Sr0.5CoO 3-Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells

AU - Lee, Daehee

AU - Jung, Inyong

AU - Lee, Seong Oh

AU - Hyun, Sang Hoon

AU - Jang, Jae Hyuk

AU - Moon, Joo Ho

PY - 2011/5/1

Y1 - 2011/5/1

N2 - Sm0.5Sr0.5CoO3 (SSC)-Sm 0.2Ce0.8O1.9 (SDC) core-shell composite cathodes are synthesized via a polymerizable complex method, and the durability of a cell incorporating the cathodes is examined. Nanocrystalline SSC powders have been coated onto the surfaces of SDC cores to enable the formation of a rigid backbone structure, over which the catalyst phase is effectively dispersed. A symmetrical SSC-SDC SDC SSC-SDC half-cell exhibits a polarization resistance of 0.098 Ω cm2 at 650 °C. The durability and microstructure of the cathode are investigated by electrochemical impedance spectroscopy and thermo-cycle tests at temperatures in the range of 100 °C-650 °C. After 30 cycles, the polarization resistance is found to increase by 9.04 × 10-2 Ω cm2, a 3.56% rise with respect to the initial resistance. Coarsening of the SSC catalyst phase has been prevented with the use of core-shell type powders, as confirmed by a nearly constant low frequency polarization resistance and a microstructural analysis. The performance of a unit cell comprised of the core-shell type cathode exhibits 1.07 W cm-2 at 600 °C and 0.62 W cm-2 at 550 °C.

AB - Sm0.5Sr0.5CoO3 (SSC)-Sm 0.2Ce0.8O1.9 (SDC) core-shell composite cathodes are synthesized via a polymerizable complex method, and the durability of a cell incorporating the cathodes is examined. Nanocrystalline SSC powders have been coated onto the surfaces of SDC cores to enable the formation of a rigid backbone structure, over which the catalyst phase is effectively dispersed. A symmetrical SSC-SDC SDC SSC-SDC half-cell exhibits a polarization resistance of 0.098 Ω cm2 at 650 °C. The durability and microstructure of the cathode are investigated by electrochemical impedance spectroscopy and thermo-cycle tests at temperatures in the range of 100 °C-650 °C. After 30 cycles, the polarization resistance is found to increase by 9.04 × 10-2 Ω cm2, a 3.56% rise with respect to the initial resistance. Coarsening of the SSC catalyst phase has been prevented with the use of core-shell type powders, as confirmed by a nearly constant low frequency polarization resistance and a microstructural analysis. The performance of a unit cell comprised of the core-shell type cathode exhibits 1.07 W cm-2 at 600 °C and 0.62 W cm-2 at 550 °C.

UR - http://www.scopus.com/inward/record.url?scp=79955680688&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79955680688&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2011.02.093

DO - 10.1016/j.ijhydene.2011.02.093

M3 - Article

AN - SCOPUS:79955680688

VL - 36

SP - 6875

EP - 6881

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 11

ER -