Novel SrTi(x)Co(1-x)O(3-delta) cathodes for low-temperature solid oxide fuel cells
2011 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 36, no 12, 7229-7233 p.Article in journal (Refereed) Published
The SrTi(x)Co(1-x)O(3-delta) (STC, x = 0.05, 0.1, 0.15, 0.2) perovskite-type oxides synthesized by the polymerized complex (PC) method have been investigated as cathode materials for low-temperature solid oxide fuel cells (SOFCs) with composite electrolyte for the first time. Thermogravimetry differential thermal analysis (TG-DTA) shows the crystallization of SrTi(0.1)Co(0.9)O(3-delta) occurs at 780 degrees C. The oxides have been stabilized to be a cubic perovskite phase after the B-site is doped with Ti ion. The maximum power density reaches as high as 613 mW cm(-2) at 600 degrees C for SOFC with SrTi(0.2)Co(0.8)O(3-delta) cathode. The maximum power densities increase with the increasing Ti content in the cathode, which can be attributed to the enhancement of conductivity and electrocatalytic activity. The stability of the fuel cell with SrTi(0.1)Co(0.9)O(3-delta) cathode has been examined for 18 h at 600 degrees C. Only a slight decline in the cell performance can be observed with increasing time. The high performance cathodes together with the low-cost fabrication technology are highly encouraging for development of low-temperature SOFCs.
Place, publisher, year, edition, pages
2011. Vol. 36, no 12, 7229-7233 p.
Solid oxide fuel cells, Cathode, Perovskite, SrTi(x)Co(1-x)O(3-delta)
IdentifiersURN: urn:nbn:se:kth:diva-39045DOI: 10.1016/j.ijhydene.2011.02.074ISI: 000291628500030ScopusID: 2-s2.0-79955919828OAI: oai:DiVA.org:kth-39045DiVA: diva2:439294
QC 201109072011-09-072011-09-072011-09-22Bibliographically approved