Yttrium and Nickel Co-Doped BaZrO3 as a Proton-Conducting Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells
Type
Conference PaperKAUST Department
Material Science and Engineering ProgramMaterials for Energy Conversion and Storage (MECS) Lab
Physical Science and Engineering (PSE) Division
Date
2015-07-17Online Publication Date
2015-07-17Print Publication Date
2015-07-17Permanent link to this record
http://hdl.handle.net/10754/594125
Metadata
Show full item recordAbstract
High temperature proton conducting oxides, due to their lower activation energy for proton conduction, can achieve high conductivity at relatively low temperatures (500-700°C). Though BaZr0.8Y0.2O3-δ (BZY) perovskite exhibits good chemical stability and high bulk conductivity, high grain boundary resistance decreases its total conductivity. This work focuses on substitution of Zr4+ with Ni2+ in the perovskite B-site in a targeted fashion in order to promote the sinterability of BZY. Powder X-ray diffraction analysis showed the formation of single phases for Ba0.8-xY0.2NixO3-δ compositions up to x = 0.04. Scanning electron microscopy (SEM) image analysis demonstrated that densification is promoted by increasing the Ni-content, reaching a fully dense microstructure for Ba0.76Y0.2Ni0.04O3-δ (BZYNi04). An anode supported single cell based on BZYNi04 electrolyte showed superior power performance, achieving 240 and 428 mW cm-2 at 600 and 700°C, respectively. © The Electrochemical Society.Citation
P. Shafi S, Bi L, Boulfrad S, Traversa E (2015) Yttrium and Nickel Co-Doped BaZrO3 as a Proton-Conducting Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells. ECS Transactions 68: 503–508. Available: http://dx.doi.org/10.1149/06801.0503ecst.Publisher
The Electrochemical SocietyJournal
ECS TransactionsConference/Event name
14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storageae974a485f413a2113503eed53cd6c53
10.1149/06801.0503ecst