화학공학소재연구정보센터
Journal of Power Sources, Vol.205, 80-85, 2012
Electrical and electrocatalytic properties of a La0.8Sr0.2Co0.17Mn0.83O3-delta cathode for intermediate-temperature solid oxide fuel cells
Our previous study of La1-xSrxMnO3 +/-delta (LSM) infiltrated La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) cathode suggests that a hybrid phase, La0.8Sr0.2Co0.17Mn0.83O3-delta (LSMCo), is associated with the observed enhancement in performance and stability of LSCF cathodes. Here we report the properties of LSMCo as a potential cathode for a solid oxide fuel cell (SOFC). The electrical conductivity of LSMCo varies from 118 to 166 S cm(-1) at 500-800 degrees C. The interfacial polarization resistances of an LSMCo cathode on YSZ electrolyte are smaller than those of an LSM cathode at 600-800 degrees C. The performance of a cell based on an LSMCo cathode is similar to 34% higher than that based on an LSM cathode while maintaining comparable long-term stability, indicating that LSMCo is a promising cathode material for intermediate temperature SOFCs. (C) 2012 Elsevier B.V. All rights reserved.