Study of electrode performance for nanosized La0.4Sr0.6Co0.8Fe0.2O3-δIT-SOFC cathode

L. V. Mogni, K. Yakal-Kremski, C. M. Chanquía, Z. Gao, H. Wang, A. Caneiro, Scott A Barnett

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

3 Scopus citations

Abstract

La0.4Sr0.6Co0.8Fe0.2O3-δ (LSCF4682) perovskite was successfully synthesized by an assisted ammonium nitrate combustion method. The sample shows a sponge-like structure with meso and macropores distributed between interconnected nanosized crystallites (45 nm) with a specific surface area around 8 m2g-1. Cathode performance of LSCF4682 was investigated in the intermediate temperature range between 400 °C-700 °C by using symmetrical cell configuration on La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) electrolyte. The cathode polarization resistances Rc,p are 0.067 and 0.035 O.cm2 at 600 °C and 700 °C, respectively. The long-term behavior of Rc,p was studied by applying an accelerate aging at 800 °C and testing the polarization resistance at 700 °C as a function of time. After 500 h of aging, a degradation rate of 1/Rc,P dRc,P/dt = 0.002 h-1raises the Rc,p to 0.1 O.cm2 at 700 °C. A maximum power density of 1.23 Wcm-2 was achieved at 650 °C testing the LSCF cathode deposited on a porous SLT-LSGM supported multilayer cell. These results demonstrate that this material is a competitive SOFC cathode for the intermediate temperature operation.

Original languageEnglish (US)
Title of host publicationSolid-Gas Electrochemical Interfaces � SGEI 1
EditorsE. Ivers-Tiffee, M. B. Mogensen, S. B. Adler, T. Kawada
PublisherElectrochemical Society Inc.
Pages169-176
Number of pages8
Edition2
ISBN (Electronic)9781607685395
DOIs
StatePublished - Jan 1 2015
Event1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting - Chicago, United States
Duration: May 24 2015May 28 2015

Publication series

NameECS Transactions
Number2
Volume66
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting
CountryUnited States
CityChicago
Period5/24/155/28/15

ASJC Scopus subject areas

  • Engineering(all)

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