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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 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 languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages1939-1944
Number of pages6
Edition2 PART 3
DOIs
Publication statusPublished - 2009 Dec 1
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: 2009 Oct 42009 Oct 9

Publication series

NameECS Transactions
Number2 PART 3
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
CountryAustria
CityVienna
Period09/10/409/10/9

ASJC Scopus subject areas

  • Engineering(all)

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