Structural and electrical characterisation of nanostructure electrodes for SOFCs
2014 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 39, no 30, 17487-17491 p.Article in journal (Refereed) Published
This paper reports the effects of sintering temperature on structure, particle size and conductivity of electrodes (Sn0.2Zn0.8Fe0.2O & Sn0.8Zn0.2Fe0.2O). The electrode material was prepared by the chemical method combining a solid state reaction. Structural analyses were performed using X-ray diffraction and scanning electron microscopy. The particle size of the material obtained using Scherrer's formula was 50-60 nm and the nanostructure's surface was studied using electrochemical characterisations tools. Electrical conductivity was determined using the 4-probe DC method, which was compared with the 4-probe AC method. These results suggest a promising substitute for the conventional electrodes of solid oxide fuel cells (SOFCs). It is known that a sintering temperature above 1000 degrees C causes an increase in density and a reduction of porosity. Therefore, we optimised the sintering temperature at 1000 degrees C and obtained electrical conductivity of about 5 S Thus, this electrode could play a vital role in the development of high performance SOFCs at intermediate temperatures.
Place, publisher, year, edition, pages
2014. Vol. 39, no 30, 17487-17491 p.
AC/DC techniques, Intermediate temperature, Nanocomposite, Conductivity, Alternative energy resources
IdentifiersURN: urn:nbn:se:kth:diva-156449DOI: 10.1016/j.ijhydene.2013.10.124ISI: 000343839000077ScopusID: 2-s2.0-84920489430OAI: oai:DiVA.org:kth-156449DiVA: diva2:767535
QC 201412012014-12-012014-11-282014-12-01Bibliographically approved