화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.163, No.2, F54-F58, 2016
Preparation of SOFC Cathodes by Infiltration into LSF-YSZ Composite Scaffolds
Fabrication of SOFC cathodes by infiltration of La0.8Sr0.2Co0.2Fe0.8O3-delta (LSCF) into porous scaffolds that were 50-wt% composites of La0.8Sr0.2FeO3-delta (LSF) and YSZ were investigated for purposes of reducing the number of infiltration steps required to make conductive electrodes. XRD patterns of porous, LSF-YSZ composites prepared by tape casting and calcined to 1723 K showed only fluorite and perovskite phases and were sufficiently conductive that 30-mu m thick films attached to YSZ electrolytes did not substantially contribute to the ohmic resistance in symmetric cells or SOFC. Non-ohmic losses at 973 K were reduced from 1.4 Omega cm(2) to 0.16 Omega cm(2) by two infiltration cycles of LSCF. (C) 2015 The Electrochemical Society.