Preparation and Characterization of Nanocomposite Calcium Doped Ceria Electrolyte With Alkali Carbonates (NK-CDC) for SOFC
2011 (English)In: Journal of Fuel Cell Science and Technology, ISSN 1550-624X, Vol. 8, no 4, 041013- p.Article in journal (Refereed) Published
The entire world's challenge is to find out the renewable energy sources due to rapid depletion of fossil fuels because of their high consumption. Solid oxide fuel cells (SOFCs) are believed to be the best alternative source, which converts chemical energy into electricity without combustion. Nanostructure study is required to develop highly ionic conductive electrolytes for SOFCs. In this work, the calcium doped ceria (Ce0.8Ca0.2O1.9) coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO3, where M = Na and K) electrolyte was prepared by coprecipitation method. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology were characterized by an X-ray diffractometer, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (TEM). The particle size was calculated in the range 10-20 nm by Scherer's formula and compared with SEM and TEM results. The ionic conductivity was measured by using ac electrochemical impedance spectroscopy method. The activation energy was also evaluated. The performance of the cell was measured 0.567 W/cm(2) at temperature 550 degrees C with hydrogen as a fuel.
Place, publisher, year, edition, pages
2011. Vol. 8, no 4, 041013- p.
electrolyte, low temperature (400-600 degrees C) fuel cell, nanostructure, alternative power source
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-32624DOI: 10.1115/1.4003635ISI: 000289118000013ScopusID: 2-s2.0-79953727042OAI: oai:DiVA.org:kth-32624DiVA: diva2:411685
QC 201104192011-04-192011-04-182011-04-19Bibliographically approved