Durable high-performance Sm0.5Sr0.5CoO3–Sm0.2Ce0.8O1.9 core-shell type composite cathodes for low temperature solid oxide fuel cells

Synthesis of LSM–YSZ–GDC dual composite SOFC cathodes for high-performance power-generation systems

“…6). The polarization resistance of the cathode is signified as half of the total interfacial polarization resistance because the symmetrical cell is composed of two symmetrical electrodes [27]. Therefore, the polarization resistance of the LSM/GDC-YSZ dual composite cathodes fired at 1100, 1150, 1200, and 1250°C were 0.480, 0.402, 0.266, and 0.299 X cm 2 , respectively.…”

Synthesis and evaluation of (La0.6Sr0.4)(Co0.2Fe0.8)O3 (LSCF)–Y0.08Zr0.92O1.96 (YSZ)–Gd0.1Ce0.9O2−δ (GDC) dual composite SOFC cathodes for high performance and durability

“…After completing half of the 50 thermal cycle tests, the electrode polarization resistance of the commercial LSCFeGDC cathode increased by 138%. It is considered that the drastic reduction of the commercial LSCFeGDC cathode stability is caused by coarsening of the LSCF phase or the absence of the GDC buffer layer, which worsen the interconnectivity with the YSZ electrolyte [20,21,26,27]. However, for the LSCF/YSZeGDC dual composite cathode, the electrode polarization resistance remained nearly constant after the 50 thermal cycle tests (Fig.…”

“…5. The electrode polarization resistance of the cathode is represented as half of the total interfacial polarization resistance of the symmetric cell, which is comprised of two symmetrical cathodes [20]. Hence, the electrode polarization resistances of the LSCF/YSZeGDC dual composite cathodes fired at 850 C, 900 C, and 950 C were 0.142 U cm 2 , 0.075 U cm 2 and 0.115 U cm 2 , respectively.…”

A La0.8Sr0.2MnO3/La0.6Sr0.4Co0.2Fe0.8O3−δ core–shell structured cathode by a rapid sintering process for solid oxide fuel cells

“…Nanostructured electrodes with nanoparticles supported on rigid scaffold have been paid with great attention for their potential application in intermediate temperature SOFCs at 600-800 o C. The catalytically active nanoparticles with special structures such as core-shell structures commonly employed in the development of highly active electrocatalysts for low temperature protonic exchange membrane fuel cells (PEMFCs) [1,2] could dramatically enhance the electrochemical performance and stability of the electrodes of SOFCs. Thus core-shell like nanostructures have been developed in order to enhance the electrochemical activity and stability of the electrodes of SOFCs [3][4][5][6][7]. Liu et al [8,9] prepared a core-shell structured cathode by infiltrating a dense (La,Sr)MnO3 (LSM) thin film into La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) scaffold, which significantly enhanced the operating durability and performance of LSCF electrodes at 850 o C for ~600 h. Zhou et al [10] fabricated a dense La2NiO4 (LN) thin layer in BSCF scaffold by infiltration followed by a microwave treatment; the LN shell substantially increased the stability of BSCF in 10% CO2 at 600 o C. Kim et al [11] coated a Pd core by CeO2 shell via self-assembly method, and found that the Pd/CeO2 core/shell nanoparticles in the (La,Sr)(Cr,Mn)O3 (LSCM)/YSZ scaffold had a much better thermal stability than the infiltrated Pd nanoparticles.…”