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Investigation of Scandia Stabilized Zirconia(ScSZ) - Yttria Stabilized Zirconia(YSZ) Composite Electrolyte for Intermediate Temperature Fuel Cells

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Abstract:

The effect of ScSZ - YSZ composite on stabilization and electrical conductivity has been investigated. Composite of (8YSZ)x(10ScSZ)(1-x)(x=0~1) were mixed by wet milling process and sintered at 1400°C for 5h and characterized by XRD, SEM, dilatometry and impedance spectroscopy. the long-term stability of the electrolyte materials was examined at 900°C for up to 1000h. The cubic phase shifts from an YSZ character to a ScSZ character with increase in percentage of ScSZ. The conductivity of composite with increasing ScSZ content is slightly higher than YSZ. Especially, above 50wt% ScSZ composition exhibited higher electrical conductivity. All compositions showed conductivity degradation after annealing at 900°C for 1000h.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

795-798

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.795

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Online since:

June 2007

Authors:

Hui Jeong Son, Tak Hyoung Lim, Dong Ryul Shin, Rak Hyun Song, Sung Hyun Kim

Keywords:

Electrolyte, ScSZ, Solid Oxide Fuel Cell (SOFC), YSZ

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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