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Perovskite La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) is often used as a cathode material for solid oxide fuel cells (SOFC) due to high mixed ionic and electronic conductivity and good catalytic activity. Unfortunately, sintering of the LSCF cathode together with the yttria stabilized zirconia (YSZ) electrolyte, leads to formation of the La2Zr2O7 and SrZrO3 phases in the interface. These phases increase the...
The width δ of the active electrode area along the triple phase boundary, TPB, is determined using a novel method based on ac impedance measurements between two interdigitated electrodes. The theoretical basis is presented and used to derive the width δ for gold electrodes applied onto the solid electrolyte (SE) Y2O3 stabilized ZrO2 (YSZ). Gold electrodes are used in the demonstration of the method...
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