LSCF–SDC core–shell high-performance durable composite cathode |
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| Authors: | Seungho Lee Hwa Seob Song Sang Hoon Hyun Joosun Kim Jooho Moon |
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| Affiliation: | aDepartment of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong Seodaemun-gu, Seoul 120-749, Republic of Korea;bCenter for Energy Materials Research, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea |
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| Abstract: | Core–shell type La0.6Sr0.4Co0.2Fe0.8O3−d (LSCF)–Sm0.2Ce0.8O2−d (SDC) powders are synthesized to achieve a high-performance durable cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The SDC core size is controlled so that all core particles are surrounded by the LSCF particles with no unattached spots. Such a core–shell composite cathode develops an ideal microstructure with improved phase contiguity, homogeneity, and maximized triple-phase boundary density. The cathode that involves an SDC core of 500 nm exhibits the lowest interfacial polarization resistance (0.265 Ω cm2 at 650 °C), as well as long-term stability during both thermo-cyclic and electrochemically accelerated tests. |
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| Keywords: | Cathode Durability Composite Core– shell particles Solid oxide fuel cell |
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