Synthesis of Ni-doped LaSrMnO3 nanopowders by hydrothermal method for SOFC interconnect applications |
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Authors: | Sang Yun Lee Juyeon Yun Weon-Pil Tai |
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Affiliation: | Fine Chemical and Material Technical Institute, Ulsan Technopark, Ulsan 44412, Republic of Korea |
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Abstract: | Ni-doped lanthanum strontium manganite (LSMN) nanopowders, La0.7Sr0.3Mn1?xNixO3 (0.05?≤?x?≤?0.3) were synthesized at 150?°C for 8?h by hydrothermal reaction as a function of Ni doping concentration. The SEM analyses suggested that the calcination treatment influenced the morphology of the nanopowders. The calcined nanopowders at 1300?°C had agglomerated spherical structure of 44–77?nm. Meanwhile, the XRD studies revealed that the nanopowders have single crystalline phase over the range x?=?0.05–0.2. In addition, the LSMN nanopowders were sintered at elevated temperatures, 1250–1350?°C to examine their electrical conductivity for solid oxide fuel cell (SOFC) interconnect applications under actual SOFC working condition. Their electrical conductivity gradually increased to 90.05?S/cm with Ni doping concentration x?=?0.2, which were sintered at 1300?°C. These results suggest La0.7Sr0.3Mn0.8Ni0.2O3 displays a good performance as an optimal composition of the LSMN. |
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Keywords: | Lanthanum strontium manganite Ni doping Solid oxide fuel cells (SOFCs) Interconnect Hydrothermal synthesis |
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