Phase Transition Mapping by Means of Neutron Imaging in SOFC Anode Supports During Reduction Under Applied Stress

Malgorzata Makowska, M. Strobl, E. M. Lauridsen, Henrik Lund Frandsen, Anton S. Tremsin, T. Shinohara, Luise Theil Kuhn

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Abstract

Mechanical and electrochemical performance of layers composed of Ni-YSZ cermet in solid oxide fuel and electrolysis cells (SOC) depends on their microstructure and initial internal stresses. After sintering, the manufacturing conditions, i.e. temperature, atmosphere and loads, can influence the microstructure and in particular the internal stresses in the Ni-YSZ layer and thereby the cell performance. Spatially resolved observation of the phase transition during reduction can provide information on how parameters like temperature and external load influence the reaction progress. This information is crucial for optimization of the SOC performance. In this work the measurements with energy resolved neutron imaging of the phase transition during the NiOYSZ reduction performed at different temperatures with and without applied load, are presented. The results indicate a link between reduction rate and stress, which will influence the initial stress field of the SOC stacks.
Original languageEnglish
JournalE C S Transactions
Volume68
Issue number1
Pages (from-to)1103-1114
ISSN1938-5862
DOIs
Publication statusPublished - 2015
EventECS Conference on Electrochemical Energy Conversion & Storage with SOFC–XIV - Glasgow, United Kingdom
Duration: 26 Jul 201531 Jul 2015

Conference

ConferenceECS Conference on Electrochemical Energy Conversion & Storage with SOFC–XIV
CountryUnited Kingdom
CityGlasgow
Period26/07/201531/07/2015

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