2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 11: Physics, Advanced/Multifunctional Materials, Composite, Quasi-crystals, Coating
| Editors: | Kongoli F, Marquis F, Lu L, Xia H, Masset P, Rokicki P |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 180 pages |
| ISBN: | 978-1-987820-56-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Synthesis characterization and conductivity of Sr1-xNaxSiO3-d
Kapil Sood1; Suddhasatwa Basu2;1THAPAR UNIVERSITY, PATIALA, Patiala, India; 2DEPARTMENT OF CHEMICAL ENGINEERING, IIT, DELHI, New Delhi, India;
Type of Paper: Regular
Id Paper: 348
Topic: 21
Abstract:
As the world population is increasing continuously, the energy demand is becoming a major challenge for the world’s energy sector. At present, energy supply mainly depends on fossil fuels which are directly related to environmental pollution. Moreover, the nuclear disaster in Fukushima, Japan in 2011 has diverted world’s attention to alternative fuel resources. Under this situation, substitutes for conventional fuel sources are in major trust areas in current research and technology. One of the alternatives to fossil fuels is solid oxide fuel cells (SOFCs). SOFCs have attracted wide attention due to its high efficiency, fuel flexibility and minimum carbon emission.
SOFCs are the class of fuel cells that are mainly based on solid oxide electrolyte. The most extensive electrolyte used for SOFC is YSZ, although high operating temperature nearly 800C is required to achieve sufficient oxide-ion conductivity. The high operating temperature of these cells lead to many problems related to material stability and compatibility with other components of SOFCs and also thermal degradation of the electrolyte itself. Therefore, now considerable attention is given in developing solid electrolytes which can operate at the intermediate temperature range (600-800C). Na-doped SrSiO3 has been investigated for its use as a solid electrolyte.
Sr1-xNaxSiO3-d (x=0.0, 0.10, 0.20, 0.30 and 0.40) have been synthesized by simple solid state reaction method. The X-ray diffraction study indicated the formation of monoclinic phase. Raman analysis is performed to support the XRD results. AC impedance spectroscopy is used to study the conductivity of the system. Sr0.6Na0.4SiO3-d showed the highest conductivity of 22.8 mS/cm at 800 C in air. The SEM analysis indicated that secondary phase is co-formed, which is segregated along the grain-boundary regions. DSC analysis further supported the formation of the amorphous phase.