Performance-Microstructure Relations in Ni/CGO Infiltrated Nb-doped SrTiO3 SOFC Anodes

Tania Ramos, Carlos Bernuy-Lopez, Bhaskar Reddy Sudireddy, Janet Jonna Bentzen, Wei Zhang, Peter Stanley Jørgensen, Luise Theil Kuhn

Research output: Contribution to journalConference articleResearchpeer-review


Nb-doped SrTiO3 solid oxide fuel cell (SOFC) anodes, infiltrated with CGO/Ni, were investigated by electrochemical impedance spectroscopy (EIS) and high resolution microscopy techniques, upon varying production and testing parameters. The electrochemical analysis involved a combination of distribution of relaxation times (DRT) and complex non-linear least squares (CNLS) fitting routine. These electrodes were studied as singlephase or as composites with 8YSZ. Sr0.94Ti0.9Nb0.1O3-δ/ 10 vol.% 8YSZ composite infiltrated electrodes were the best overall performers, with enhanced performance stability under higher steam contents. Combined DRT/CNLS showed the existence of at least three contributing processes to the total polarisation resistance (Rp) of these electrodes. Microstructural changes involving infiltrate growth and redistribution were also confirmed.
Original languageEnglish
JournalE C S Transactions
Issue number1
Pages (from-to)389-402
Publication statusPublished - 2012
Event221st ECS Meeting - Seattle, WA, United States
Duration: 6 May 201210 May 2012


Conference221st ECS Meeting
Country/TerritoryUnited States
CitySeattle, WA


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