High Performance Nano-Ceria Electrodes for Solid Oxide Cells

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

In solid oxide electrochemical cells, the conventional Ni-based fuel-electrodes provide high electrocatalytic activity but they are often a major source of long-term performance degradation due to carbon deposition, poisoning of reaction sites, Ni mobility, etc. Doped-ceria is a promising mixed ionic-electronic conducting oxide that could solve these issues if it can be integrated into an appropriate electrode structure. Two new approaches to obtain high-performance nanostructured doped-ceria electrodes are highlighted. The first is an infiltration-based architecture with Ce0.8Pr0.2O2-δ forming the active surfaces on a porous backbone with embedded electronic current collector material, yielding one of the highest performances reported for an electrode that operates either on fuel or oxidant. The second is a nano-Ce0.9Gd0.1O2-δ thin film prepared by spin-coating, which provides an unprecedented electrode polarization resistance of ~0.01 Ω cm2 at 650 °C in H2/H2O. These results demonstrate that nano-ceria has the ability to achieve higher performance than Ni-based electrodes and show that the main challenge is obtaining sufficient electronic current collection without adding too much inactive material.
Original languageEnglish
JournalE C S Transactions
Volume72
Issue number7
Pages (from-to)183-192
Number of pages10
ISSN1938-5862
DOIs
Publication statusPublished - 2016
EventThe 229th ECS Meeting - San Diego, CA, United States
Duration: 29 May 20162 Jun 2016
Conference number: 229
http://www.electrochem.org/229

Conference

ConferenceThe 229th ECS Meeting
Number229
CountryUnited States
CitySan Diego, CA
Period29/05/201602/06/2016
Internet address

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