Preparation and characterization of Sm0.2Ce0.8O1.9/Na2CO3 nanocomposite electrolyte for low-temperature solid oxide fuel cells
2011 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 36, no 6, 3984-3988 p.Article in journal (Refereed) Published
Sm0.2Ce0.8O1.9 (SDC)/Na2CO3 nanocomposite synthesized by the co-precipitation process has been investigated for the potential electrolyte application in low-temperature solid oxide fuel cells (SOFCs). The conduction mechanism of the SDC/Na2CO3 nanocomposite has been studied. The performance of 20 mW cm(-2) at 490 degrees C for fuel cell using Na2CO3 as electrolyte has been obtained and the proton conduction mechanism has been proposed. This communication demonstrates the feasibility of direct utilization of methanol in low-temperature SOFCs with the SDC/Na2CO3 nanocomposite electrolyte. A fairly high peak power density of 512 mW cm(-2) at 550 degrees C for fuel cell fueled by methanol has been achieved. Thermodynamical equilibrium composition for the mixture of steam/methanol has been calculated, and no presence of C is predicted over the entire temperature range. The long-term stability test of open circuit voltage (OCV) indicates the SDC/Na2CO3 nanocomposite electrolyte can keep stable and no visual carbon deposition has been observed over the anode surface. Copyright (C) 2011, Hydrogen Energy Publications, LLC.
Place, publisher, year, edition, pages
2011. Vol. 36, no 6, 3984-3988 p.
Solid oxide fuel cells, Nanocomposite, Conductivity, Proton conduction, Sodium carbonate
IdentifiersURN: urn:nbn:se:kth:diva-33229DOI: 10.1016/j.ijhydene.2010.12.061ISI: 000289331800022ScopusID: 2-s2.0-79952440269OAI: oai:DiVA.org:kth-33229DiVA: diva2:415816