Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722708 | International Journal of Hydrogen Energy | 2013 | 10 Pages |
Abstract
We synthesized Ba0.5Sr0.5Co0.8Fe0.2O3âδ (BSCF) powders with a primary particle size of 20 nm using a Pechini type method. By using nanocrystalline BSCF powders, we were able to fabricate a ceria interlayer-free nanoporous cathode on a scandia stabilized zirconia (ScSZ) electrolyte at low temperatures. Cathodes sintered below 750 °C lacked sufficient mechanical adhesion to the electrolyte, while electrode was well adhered to the electrolyte when fired at 800 °C. The symmetrical BSCF-ScSZ|yttria stabilized zirconia (YSZ)|BSCF-ScSZ half-cell that we generated had an exceptionally low polarization resistance of 0.06 Ω·cm2 at 700 °C. The maximum power density of the BSCF-ScSZ|ScSZ|Ni-ScSZ unit cell was over 1 W cmâ2 at 700 °C. We investigated the durability of the BSCF-ScSZ composite cathode by 30 thermo-cycles performed by varying the temperature from 200 to 700 °C. The polarization resistance after the test remained low at less than 0.08 Ω·cm2.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
Seong Oh Lee, Daehee Lee, Inyong Jung, Dongha Kim, Sang-Hoon Hyun, Joosun Kim, Jooho Moon,