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- W3155183231 abstract "In this study, electrochemical properties of layered perovskites having non-stoichiometric compositions (Sm 1−x BaCo 2 O 5+d , x = 0, 0. 01, 0.02, 0.03, 0.04, 0.05, 0.10, and 0.15) were analyzed for the direct application of cathode materials for Intermediate Temperature-operating Solid Oxide Fuel Cells (IT-SOFC). From the Sm 1−x BaCo 2 O 5+d oxide systems calcined at 1,100°C for 8 h, single phase (SmBaCo 2 O 5+d , SBCO_1) was maintained only in the case of the x = 0 composition. In the compositions of x = 0.05–0.10, BaCoO 2.6 was mixed with the pattern of SBCO. In addition, in the composition of x = 0.15, it was confirmed that BaCoO 2.6 and CoO phases coexisted with SBCO. In the compositions of Sm 1−x BaCo 2 O 5+d , the overall Area Specific Resistance (ASR) values decreased as the removal amount of Sm increased from x = 0–0.10; then, the values increased for compositions from x = 0.15. For example, the ASRs of SBCO_1, Sm 0.95 BaCo 2 O 5+d (SBCO_0.95), Sm 0.90 BaCo 2 O 5+d (SBCO_0.90), and Sm 0.85 BaCo 2 O 5+d (SBCO_0.85) measured at 600°C were 0.301, 0.147, 0.119, and 0.179 Ω cm 2 , respectively. In particular, SBCO_0.90 was found to have an excellent ASR property of about 0.035 Ω cm 2 at 700°C. Typical properties of the metal–insulator transition (MIT) electrical conductivity were shown in all measured compositions. The temperature at which MIT occurred increased as the non-stoichiometric composition increased." @default.
- W3155183231 created "2021-04-26" @default.
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- W3155183231 date "2021-04-21" @default.
- W3155183231 modified "2023-10-13" @default.
- W3155183231 title "Enhanced Electrochemical Properties of Non-stoichiometric Layered Perovskites, Sm1−xBaCo2O5+d, for IT-SOFC Cathodes" @default.
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- W3155183231 doi "https://doi.org/10.3389/fchem.2021.633868" @default.
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