나노섬유 제작기술을 적용한 저온형 고체산화물 연료전지 이중층 페로브스카이트 나노섬유 공기극의 특성 분석
Characterization of Layered Perovskite Nanofibers using Electrospinning for Cathode Materials of Low Temperature-operating Solid Oxide Fuel Cell
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In this study, linear typed nanofibers were fabricated by controlling the variables with the great effects on nanofiberfabrication and the microstructural properties of fabricated nanofibers were investigated as a preliminary step to serve as a carrier,including SmBa0.5Sr0.5Co2O5+d (SBSCO) cathode materials for low temperature-operating solid oxide fuel cells (LT-SOFCs). Beadlessnanofibers were produced at a nozzle to substrate distance of at least 9 cm when using the electrospinning process. The diameter of thenanofibers increased with increasing flow rate, and the diameter of the nanofibers also increased at a nozzle to substrate distance of 9cm or more. As the humidity increased, collapse of the nanofibers was observed. The fabricated nanofibers, as a carrier for SBSCO,were decomposed in three parts: a temperature range of RT~340°C, 340°C~454°C, and higher than 454°C. No further weight losseswere observed at temperatures higher than 625°C. The lowest area specific resistance (ASR) was observed when SBSCO was used inthe nanofiber type and the SBSCO nanofiber exhibited an ASR value of 0.85 Ω.cm2at 550°C.
Abstract
In this study, linear typed nanofibers were fabricated by controlling the variables with the great effects on nanofiberfabrication and the microstructural properties of fabricated nanofibers were investigated as a preliminary step to serve as a carrier,including SmBa0.5Sr0.5Co2O5+d (SBSCO) cathode materials for low temperature-operating solid oxide fuel cells (LT-SOFCs). Beadlessnanofibers were produced at a nozzle to substrate distance of at least 9 cm when using the electrospinning process. The diameter of thenanofibers increased with increasing flow rate, and the diameter of the nanofibers also increased at a nozzle to substrate distance of 9cm or more. As the humidity increased, collapse of the nanofibers was observed. The fabricated nanofibers, as a carrier for SBSCO,were decomposed in three parts: a temperature range of RT~340°C, 340°C~454°C, and higher than 454°C. No further weight losseswere observed at temperatures higher than 625°C. The lowest area specific resistance (ASR) was observed when SBSCO was used inthe nanofiber type and the SBSCO nanofiber exhibited an ASR value of 0.85 Ω.cm2at 550°C.
참고문헌 (14)
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