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Title: High performance of SDC and GDC core shell type composite electrolytes using methane as a fuel for low temperature SOFC

Nanocomposites Samarium doped Ceria (SDC), Gadolinium doped Ceria (GDC), core shell SDC amorphous Na{sub 2}CO{sub 3} (SDCC) and GDC amorphous Na{sub 2}CO{sub 3} (GDCC) were synthesized using co-precipitation method and then compared to obtain better solid oxide electrolytes materials for low temperature Solid Oxide Fuel Cell (SOFCs). The comparison is done in terms of structure, crystallanity, thermal stability, conductivity and cell performance. In present work, XRD analysis confirmed proper doping of Sm and Gd in both single phase (SDC, GDC) and dual phase core shell (SDCC, GDCC) electrolyte materials. EDX analysis validated the presence of Sm and Gd in both single and dual phase electrolyte materials; also confirming the presence of amorphous Na{sub 2}CO{sub 3} in SDCC and GDCC. From TGA analysis a steep weight loss is observed in case of SDCC and GDCC when temperature rises above 725 °C while SDC and GDC do not show any loss. The ionic conductivity and cell performance of single phase SDC and GDC nanocomposite were compared with core shell GDC/amorphous Na{sub 2}CO{sub 3} and SDC/ amorphous Na{sub 2}CO{sub 3} nanocomposites using methane fuel. It is observed that dual phase core shell electrolytes materials (SDCC, GDCC) show better performance in low temperature range thanmore » their corresponding single phase electrolyte materials (SDC, GDC) with methane fuel.« less
Authors:
; ; ; ;  [1] ;  [2] ;  [3]
  1. Department of Physics, University of Engineering and Technology, Lahore (Pakistan)
  2. Department of Physics, COMSATS Institute of Information Technology, Lahore (Pakistan)
  3. Deanship of scientific research, College of Engineering, PO Box 800, King Saud University, Riyadh 11421 (Saudi Arabia)
Publication Date:
OSTI Identifier:
22492434
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 2; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERIUM OXIDES; COMPARATIVE EVALUATIONS; COPRECIPITATION; DOPED MATERIALS; ELECTROLYTES; GADOLINIUM; IONIC CONDUCTIVITY; METHANE; NANOCOMPOSITES; PERFORMANCE; SAMARIUM; SODIUM CARBONATES; SOLID OXIDE FUEL CELLS; SOLIDS; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION