Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7737620 | Journal of Power Sources | 2014 | 6 Pages |
Abstract
Sr0.9Ce0.1Co0.9Nb0.1O3âδ (SCCN) has been synthesized using solid state reaction, and investigated as a new cathode material for intermediate temperature solid oxide fuel cells (ITSOFCs). SCCN material exhibits sufficiently high electronic conductivity and excellent chemical compatibility with SDC electrolyte. Highly charged Ce4+ and Nb5+ successfully stabilize the perovskite structure to avoid order-disorder phase transition. The electrical conductivity reaches a high value of 516 S cmâ1 at 300 °C in air. The area specific resistances of the SCCN-50 wt.% Ce0.8Sm0.2O1.9 (SDC) cathode are as low as 0.027, 0.049, and 0.094 Ω cm2 at 700, 650, and 600 °C, respectively, with the corresponding peak power densities of 1074, 905, and 589 mW cmâ2. A relatively low thermal expansion coefficient of SCCN-SDC is 14.3 Ã 10â6 Kâ1 in air. All these results imply that SCCN holds tremendous promise as a cathode material for ITSOFCs.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Shouguo Huang, Shuangjiu Feng, Qiliang Lu, Yide Li, Hong Wang, Chunchang Wang,