Improved ceria-carbonate composite electrolytes
2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 35, no 7, 2684-2688 p.Article in journal (Refereed) Published
It has been successfully demonstrated that the fuel cells using the ceria-carbonate composite as electrolytes have achieved excellent performances of 200-1150 W/cm(2) at 300-600 degrees C. Previously it was reported these ceria-carbonate composite electrolytes have been prepared with two-step processes: step 1, prepare ion-doped ceria which was prepared usually through the wet-chemical co-precipitation process; step 2, mixing the doped ceria with carbonates in various compositions. We first report here to prepare the SDC-carbonate composites within one-step chemical co-precipitation process, i.e. mixing carbonates and preparing the SDC in the same process. The one-step process has provided a number of advantages: (i) to reduce the involved preparation processes to enhance the production, to make the produced materials in good quality control, more homogenous composites microstructure; (ii) as results, these composites showed also different microstructures and electrical properties. It has significantly improved the ceria-carbonate conductivities and cause the superionic conduction at much lower temperatures; (iii) to reduce manufacturing costs also.
Place, publisher, year, edition, pages
2010. Vol. 35, no 7, 2684-2688 p.
Low temperature, Ceria-carbonate, Nanocomposites, Interfacial mechanism, Superionic conduction
IdentifiersURN: urn:nbn:se:kth:diva-29901DOI: 10.1016/j.ijhydene.2009.04.038ISI: 000276692800022ScopusID: 2-s2.0-77951024774OAI: oai:DiVA.org:kth-29901DiVA: diva2:398691
QC 20110218 3rd International Hydrogen Forum, Tsinghua Univ, Changsha, PEOPLES R CHINA, AUG 03-06, 20082011-02-182011-02-172011-12-13Bibliographically approved