Preparation and characterization of nanocomposite calcium doped ceria electrolyte with alkali carbonates (NK-CDC) for SOFC
2010 (English)In: ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2010, ASME Press, 2010, 427-432 p.Conference paper (Refereed)
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. Nanostructured study is required to develop highly ionic conductive electrolyte for SOFCs. In this work, the calcium doped ceria (Ce0.8Ca0.2O 1.9) coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO3, where M= Na and K) electrolyte was prepared by co-precipitation method in this study. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology was characterized by X-Ray Diffractometer (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). The particle size was calculated in the range of 10-20nm by Scherrer's formula and compared with SEM and TEM results. The ionic conductivity was measured by using AC Electrochemical Impedance Spectroscopy (EIS) method. The activation energy was also evaluated. The performance of the cell was measured 0.567W/cm2 at temperature 550°C with hydrogen as a fuel.
Place, publisher, year, edition, pages
ASME Press, 2010. 427-432 p.
Alternative power source, Electrolyte, Low temperature (400°C-600°C) fuel cell, Nanostructure, Surface morphology
IdentifiersURN: urn:nbn:se:kth:diva-150283DOI: 10.1115/FuelCell2010-33325ISI: 000291011500050ScopusID: 2-s2.0-84860282447ISBN: 978-0-7918-4405-2OAI: oai:DiVA.org:kth-150283DiVA: diva2:742967
ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2010; Brooklyn, NY; United States; 14 June 2010 through 16 June 2010
QC 201409032014-09-032014-09-012014-09-03Bibliographically approved