Electrochemical performance of La0.6Sr0.4Co0.2Fe0.8O3–Ce0.9Gd0.1O2-δ composite SOFC cathodes fabricated by electrocatalyst and/or electrocatalyst-ionic conductor infiltration

Abstract

Electrochemical performance of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 -Ce 0.9 Gd 0.1 O 2-δ composite SOFC cathodes fabricated by electrocatalyst and/or electrocatalyst-ionic conductor infiltration

Microstructural investigation of the effect of electrospraying parameters on LSCF films

“…Therefore, reduced O 2 ions can be transported to GDC via TPBs and inside the bulk of LSCF [63]. Required steps and ORR mechanisms in porous structures are explained further in other studies of the authors [26]. Sample 7, on the other hand, had large cracks which isolated the pieces due to macroscopic porosities.…”

“…Increasing some parameters led to degradation of film quality and macro cracks formed. Therefore, area specific resistance of coral micro-structured sample was lower than the cracked sample in the temperature range of 500e700 C. For a better comparison, studies involving conventionally formed LSCF methods like screen printing [67], infiltration [26], spray pyrolysis [68], PLD [69], RF magnetron sputtering [70], spin coating [71], with two different ESD study [55,60] are also added to that Fig. 9b.…”

“…Physical methods are classified as i) Physical Vapor Deposition (PVD) which involves different types of sputtering methods like radio-frequency and magnetron sputtering [22], ii) laser deposition methods such as Pulsed Laser Deposition (PLD) which leads to the formation of desired film on a substrate via vaporization by laser beams [23e25]. Finally, other methods are screen printing, tape casting which helps deposit a ceramic slurry on a ceramic substrate through open mesh and/or doctor blade, respectively [26,27]. Besides, spin and dip coating techniques are quite common techniques [28].…”

Formation of Nanocomposite Solid Oxide Fuel Cell Cathodes by Preferential Clustering of Cations from a Single Polymeric Precursor

“…The low-frequency (0.9 Hz) process observable only in the EIS response of LCM-SDC/SDC/YSZ-800 samples at 600 °C had a capacitance of 0.76 F/cm 2 (Table ). Low frequency processes with high capacitances have been related either to the oxygen incorporation into the perovskite lattice − or concentration polarization. , Since the former process is characterized by a strong temperature dependence, while the latter is known to be almost independent of temperature, EIS measurements at 650 °C were also performed on the same sample to clarify the nature of the low frequency arc (Figure a inset). Increasing the measurement temperature from 600 to 650 °C resulted in significantly reduced resistances of the high and medium frequency processes (Table ).…”

Review of SOFC Cathode Performance Enhancement by Surface Modifications: Recent Advances and Future Directions

“…The common electrolyte materials for SOFCs are ionic conductors, such as yttrium-stabilized zirconia (YSZ), − gadolinia-doped ceria (GDC), samarium-doped cerium (SDC), (Bi 0.8 Er 0.2 ) 2 O 3 (ESB), strontium-/magnesium-doped lanthanum gallate (LSGM), , and some proton-conducting electrolyte materials . Therefore, materials with high electronic conductivity and catalytic activity are usually selected as precursor solutions when these electrolyte materials act as backbones.…”