Synthesis and applications of composite cathode based on Sm0.5Sr0.5CoO3-delta for solid oxide fuel cell

Title
Synthesis and applications of composite cathode based on Sm0.5Sr0.5CoO3-delta for solid oxide fuel cell
Author(s)
김혜경박영민[박영민]
Keywords
FERRITE-BASED PEROVSKITES; ELECTROCHEMICAL PERFORMANCE; STABILIZED ZIRCONIA; SOFC CATHODES; SURFACE-AREA; ELECTRODES; CONDUCTIVITY; POLARIZATION; RESISTANCE; INTERLAYER
Issue Date
201311
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.30, no.11, pp.2017 - 2025
Abstract
Cobaltite based perovskites, such as Sm0.5Sr0.5CoO3-delta(SSC), are attractive solid oxide fuel cell (SOFC) cathodes due to their high electrochemical activity and electrical conductivity. To obtain higher fuel cell, performance with smaller particles, nano-sized SSC powders were synthesized by a complex method with/without carbon black, HB170. However, during synthesis, carbon black reacted with Sr, and unfortunately formed SrCO3. To obtain pure perovskite SSC, a calcination temperature of 900 degrees C is needed. At 680 degrees C, an SOFC with SSC (calcined at 700 degrees C and synthesized without HB170) exhibited a higher fuel cell performance, of 0.68 W.cm(-2), than that with SSCHB (calcined at 900 degrees C and synthesized with HB170), of 0.58 W.cm(-2). Adding GDC for composite cathode is more effective in SSCHB porous cathodes than in SSC porous cathodes. At 680 degrees C, the composite cathode of SSCHB6-GDC4 exhibited the highest maximum power density of 0.72 W.cm(-2) which results from the combined effects of lowered charge transfer polarization and mass transfer polarization. To obtain higher fuel cell performance, optimum composition and processes are necessary.
URI
http://hdl.handle.net/YU.REPOSITORY/28523http://dx.doi.org/10.1007/s11814-013-0144-2
ISSN
0256-1115
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공과대학 > 신소재공학부 > Articles
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