Triple phase boundary reaction in a mixed-conducting SOFC cathode

K. Amezawa, Y. Fujimaki, K. Mizuno, Y. Kimura, T. Nakamura, K. Nitta, Y. Terada, F. Iguchi, K. Yashiro, H. Yugami, T. Kawada

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

8 Citations (Scopus)

Abstract

The contribution of the triple phase boundary reaction in a mixed ionic and electronic conducting (MIEC) cathode in solid oxide fuel cells (SOFCs) was investigated. For this purpose, patterned thin film electrodes with or without triple phase boundaries, which simplified the microstructure of a practical porous electrode, were proposed and fabricated. In this work, an La0.6Sr0.4CoO3-δ (LSC) electrode on a Ce0.9Gd0.1O1.95 electrolte was chosen as a model SOFC MIEC cathode. Effective reaction area was evaluated by means of operando micro X-ray absorption spectroscopy with the model electrodes under 10"2 bar of p(O2) at 873 K. It was found that the introduction of triple phase boundaries shortened the effective reaction area. The results may indicate the non-negligible contribution of the triple phase boundary reaction even in SOFC MIEC cathodes.

Original languageEnglish
Title of host publicationSolid-Gas Electrochemical Interfaces 2 - SGEI 2
EditorsB. Yildiz, S. Adler, E. Ivers-Tiffee, T. Kawada
PublisherElectrochemical Society Inc.
Pages41-47
Number of pages7
Edition10
ISBN (Electronic)9781607688136
DOIs
Publication statusPublished - 2017
EventSymposium on Solid-Gas Electrochemical Interfaces 2, SGEI 2017 - 231st ECS Meeting 2017 - New Orleans, United States
Duration: 2017 May 282017 Jun 1

Publication series

NameECS Transactions
Number10
Volume77
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherSymposium on Solid-Gas Electrochemical Interfaces 2, SGEI 2017 - 231st ECS Meeting 2017
CountryUnited States
CityNew Orleans
Period17/5/2817/6/1

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Triple phase boundary reaction in a mixed-conducting SOFC cathode'. Together they form a unique fingerprint.

Cite this