High temperature properties of La0.6Sr0.4Co0.8Fe0.2O3−δ phase structure and electrical conductivity

Ba0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell

“…Each semicircle is represented by a pair of a resistor and a capacitor parallel connected (R i , C i ). Each capacitor is replaced by a constant phase element (CPE) which impedance may be expressed by the following formula [40]: (2) where j is imaginary unit, f is the frequency, f 0 is the frequency of reference, C i is the capacitance at the frequency of reference, index i is the number of (R, CPE) pair and α is a coefficient close to 1 for an ideal capacitor and usually assuming a value between 0.8-1.0 for the double layer capacitance and close to 0.5 for capacitances connected to diffusion processes. In this work is assumed f 0 =1 khz.…”

“…The good cathode material should reveal excellent catalytic activity in the oxygen reduction reaction (ORR), high ionic and electronic conductivity and the thermal expansion coefficient (TEC) similar to the TEC of the electrolyte. (BSCF) cathode materials are extensively studied due their excellent properties [1][2][3][4][5][6][7][8][9][10]. The electronic conductivity of LSCF is very high in comparison to other cathode materials, revealing the maximum value of 215.58 S cm −1 at 823 K, whereas BSCF reveals much lower electronic conductivity 14.87 S cm −1 at 773 K [1].…”

“…The ionic conductivity of LSCF and BSCF are enough high in comparison to doped cerias -typical electrolytes for IT-SOFC. LSCF at 1073 K reveal ionic conductivity at the same level as gadolinia-doped ceria (GDC) [2], whereas ionic conductivity of BSCF is even higher than samariadoped ceria (SDC) ionic conductivity [8]. BSCF reacts with CO 2 present in air, forming oxides and carbonates [9,10].…”

Fabrication and Characterization of Composite LSCF-Ag Cathode for Solid Oxide Fuel Cells using Electron Beam Irradiation Process

“…9,10 Moreover, this process results in fewer by-products and is a continuous manufacturing process. It thus has strong prospects for mass production of nano-particles based cathode.…”

Anelastic properties of La0.6Sr0.4Co1−Fe O3- at high temperatures

“…La1-xSrxCo1-yFeyO3-δ (LSCF) is widely used as a cathode for SOFCs because of its high mixed electronic-ionic conductivity and fast oxygen surface exchange [2] . Although its electrical properties, oxygen nonstoichiometry and lattice size have been intensively studied [3][4][5][6] , there are few studies about the mechanical properties of LSCF especially under SOFC operating conditions. For the above background, our group investigated the elastic modulus of LSCF at high temperatures under controlled atmospheres [7] .…”