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Characterization of La0.8Sr0.2MnOδ Nanopowders Synthesized by Aerosol Flame Synthesis for SOFC Cathode

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Abstract:

Lanthanum strontium manganite (La0.8Sr0.2MnOδ , LSM) powders with a high specific surface area (55.26 m2/g) were successfully synthesized by aerosol flame synthesis (AFS) technique. The crystallinity and morphology of the synthesized powders sintered at various temperatures were studied by XRD, TEM and BET. The synthesized powders exhibited spherical shape mostly in a few nanometer ranges with a relatively high crystallinity due to thermal plasma reactions in a high temperature of oxy-hydrogen flame. To analyze electrochemical performances of synthesized LSM powders, impedance spectroscopy (IS) was carried out with the symmetric cells prepared by slurry based electrostatic spray deposition (ESD) onto the YSZ electrolyte pellet. The interfacial polarization resistances were 3.04 Ω·cm2 at 750 °C which is relatively lower than that of micro-porous film (7.24 Ω·cm2) applying micro-sized powders deposited on same condition.

Keywords: AEROSOL FLAME SYNTHESIS (AFS); LSM; NANOPOWDER; SOLID OXIDE FUEL CELLS (SOFCS)

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4782

Publication date: August 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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