Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction

Y. J. Leng; S. H. Chan; S. P. Jiang; K. A. Khor

doi:10.1016/j.ssi.2004.02.026

Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction

Y. J. Leng, S. H. Chan, S. P. Jiang, K. A. Khor

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

269 Scopus citations

Abstract

Dense electrolyte thin film made of Ce_0.8Gd_0.2O _1.90 (GDC20) with a thickness of about 10 μm and supported by Ni-Gd_0.1Ce_0.9O_1.95 (GDC) cermet anode was fabricated in situ by solid-state reaction of ceria and gadolinia. The open circuit voltage of this GDC20 cell is 0.86 V at 600 °C and 0.95 V at 500 °C. With La_0.8Sr_0.2Co_0.2Fe _0.8O₃ (LSCF)-GDC composite cathode, we could achieve an excellent cell performance with the maximum power density of 578, 358, and 167 mW/cm² at 600, 550 and 500 °C, respectively, under open-air conditions. With airflow through the cathode, the maximum power density increases to 625 mW/cm² at 600 °C. It was also found that the cell impedance/polarization under open circuit is dominated by electrode polarization contribution; while under high cell overpotential, it is governed by both ohmic loss and electrode polarization contribution.

Original language	English (US)
Pages (from-to)	9-15
Number of pages	7
Journal	Solid State Ionics
Volume	170
Issue number	1-2
DOIs	https://doi.org/10.1016/j.ssi.2004.02.026
State	Published - May 14 2004

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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title = "Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction",

abstract = "Dense electrolyte thin film made of Ce0.8Gd0.2O 1.90 (GDC20) with a thickness of about 10 μm and supported by Ni-Gd0.1Ce0.9O1.95 (GDC) cermet anode was fabricated in situ by solid-state reaction of ceria and gadolinia. The open circuit voltage of this GDC20 cell is 0.86 V at 600 °C and 0.95 V at 500 °C. With La0.8Sr0.2Co0.2Fe 0.8O3 (LSCF)-GDC composite cathode, we could achieve an excellent cell performance with the maximum power density of 578, 358, and 167 mW/cm2 at 600, 550 and 500 °C, respectively, under open-air conditions. With airflow through the cathode, the maximum power density increases to 625 mW/cm2 at 600 °C. It was also found that the cell impedance/polarization under open circuit is dominated by electrode polarization contribution; while under high cell overpotential, it is governed by both ohmic loss and electrode polarization contribution.",

author = "Leng, {Y. J.} and Chan, {S. H.} and Jiang, {S. P.} and Khor, {K. A.}",

year = "2004",

month = may,

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doi = "10.1016/j.ssi.2004.02.026",

language = "English (US)",

volume = "170",

pages = "9--15",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction

AU - Leng, Y. J.

AU - Chan, S. H.

AU - Jiang, S. P.

AU - Khor, K. A.

PY - 2004/5/14

Y1 - 2004/5/14

N2 - Dense electrolyte thin film made of Ce0.8Gd0.2O 1.90 (GDC20) with a thickness of about 10 μm and supported by Ni-Gd0.1Ce0.9O1.95 (GDC) cermet anode was fabricated in situ by solid-state reaction of ceria and gadolinia. The open circuit voltage of this GDC20 cell is 0.86 V at 600 °C and 0.95 V at 500 °C. With La0.8Sr0.2Co0.2Fe 0.8O3 (LSCF)-GDC composite cathode, we could achieve an excellent cell performance with the maximum power density of 578, 358, and 167 mW/cm2 at 600, 550 and 500 °C, respectively, under open-air conditions. With airflow through the cathode, the maximum power density increases to 625 mW/cm2 at 600 °C. It was also found that the cell impedance/polarization under open circuit is dominated by electrode polarization contribution; while under high cell overpotential, it is governed by both ohmic loss and electrode polarization contribution.

AB - Dense electrolyte thin film made of Ce0.8Gd0.2O 1.90 (GDC20) with a thickness of about 10 μm and supported by Ni-Gd0.1Ce0.9O1.95 (GDC) cermet anode was fabricated in situ by solid-state reaction of ceria and gadolinia. The open circuit voltage of this GDC20 cell is 0.86 V at 600 °C and 0.95 V at 500 °C. With La0.8Sr0.2Co0.2Fe 0.8O3 (LSCF)-GDC composite cathode, we could achieve an excellent cell performance with the maximum power density of 578, 358, and 167 mW/cm2 at 600, 550 and 500 °C, respectively, under open-air conditions. With airflow through the cathode, the maximum power density increases to 625 mW/cm2 at 600 °C. It was also found that the cell impedance/polarization under open circuit is dominated by electrode polarization contribution; while under high cell overpotential, it is governed by both ohmic loss and electrode polarization contribution.

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SN - 0167-2738

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SP - 9

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JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-2

ER -

Low-temperature SOFC with thin film GDC electrolyte prepared in situ by solid-state reaction

Abstract

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