Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC

H. Watanabe; A. Unemoto; K. Amezawa; T. Kawada

doi:10.1149/1.3205738

Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC

H. Watanabe, A. Unemoto, K. Amezawa, T. Kawada

Tohoku University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

8 Citations (Scopus)

Abstract

AC impedance measurements were carried out with Ni-GDC cermet anode in various partial pressures of hydrogen at temperatures from 873 K to 1273 K; the data was analyzed focusing on the chemical capacitance. It is proposed that the effective reaction zone (ERZ) of the cermet anode could be evaluated by comparing the observed capacitance and the one expected for the whole electrode. The ERZ was estimated as 1 μm for the Ni-GDC electrode investigated in this work. Degradation mode of the cermet anode is discussed based on the observed change in the ERZ. It is suggested that the agglomeration of Ni particles might be the main factor for the degradation during the thermal cycle at high temperature.

Original language	English
Title of host publication	ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages	1939-1944
Number of pages	6
Edition	2 PART 3
DOIs	https://doi.org/10.1149/1.3205738
Publication status	Published - 2009
Event	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria Duration: 2009 Oct 4 → 2009 Oct 9

Publication series

Name	ECS Transactions
Number	2 PART 3
Volume	25
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Conference

Conference	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country/Territory	Austria
City	Vienna
Period	09/10/4 → 09/10/9

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title = "Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC",

abstract = "AC impedance measurements were carried out with Ni-GDC cermet anode in various partial pressures of hydrogen at temperatures from 873 K to 1273 K; the data was analyzed focusing on the chemical capacitance. It is proposed that the effective reaction zone (ERZ) of the cermet anode could be evaluated by comparing the observed capacitance and the one expected for the whole electrode. The ERZ was estimated as 1 μm for the Ni-GDC electrode investigated in this work. Degradation mode of the cermet anode is discussed based on the observed change in the ERZ. It is suggested that the agglomeration of Ni particles might be the main factor for the degradation during the thermal cycle at high temperature.",

author = "H. Watanabe and A. Unemoto and K. Amezawa and T. Kawada",

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booktitle = "ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)",

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note = "11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting ; Conference date: 04-10-2009 Through 09-10-2009",

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Watanabe, H, Unemoto, A, Amezawa, K & Kawada, T 2009, Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC. in ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). 2 PART 3 edn, ECS Transactions, no. 2 PART 3, vol. 25, pp. 1939-1944, 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting, Vienna, Austria, 09/10/4. https://doi.org/10.1149/1.3205738

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T1 - Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC

AU - Watanabe, H.

AU - Unemoto, A.

AU - Amezawa, K.

AU - Kawada, T.

PY - 2009

Y1 - 2009

N2 - AC impedance measurements were carried out with Ni-GDC cermet anode in various partial pressures of hydrogen at temperatures from 873 K to 1273 K; the data was analyzed focusing on the chemical capacitance. It is proposed that the effective reaction zone (ERZ) of the cermet anode could be evaluated by comparing the observed capacitance and the one expected for the whole electrode. The ERZ was estimated as 1 μm for the Ni-GDC electrode investigated in this work. Degradation mode of the cermet anode is discussed based on the observed change in the ERZ. It is suggested that the agglomeration of Ni particles might be the main factor for the degradation during the thermal cycle at high temperature.

AB - AC impedance measurements were carried out with Ni-GDC cermet anode in various partial pressures of hydrogen at temperatures from 873 K to 1273 K; the data was analyzed focusing on the chemical capacitance. It is proposed that the effective reaction zone (ERZ) of the cermet anode could be evaluated by comparing the observed capacitance and the one expected for the whole electrode. The ERZ was estimated as 1 μm for the Ni-GDC electrode investigated in this work. Degradation mode of the cermet anode is discussed based on the observed change in the ERZ. It is suggested that the agglomeration of Ni particles might be the main factor for the degradation during the thermal cycle at high temperature.

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T3 - ECS Transactions

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EP - 1944

BT - ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)

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ER -

Electrochemical analysis on degradation of Ni-GDC cermet anode for SOFC

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