TY - JOUR
T1 - Investigation of li dopant as a sintering aid for ScSZ electrolyte for IT-SOFC
AU - Mori, Masashi
AU - Liu, Yu
AU - Shuhua, Ma
AU - Hashimoto, Shin Ichi
AU - Takei, Katsuhito
PY - 2008/12
Y1 - 2008/12
N2 - In this study, the effects of small amounts (≤3 mol%) of Li doping on the sintering characteristics and electrochemical performance of (ZrO 2)0.89(ScO1.5)0.1(ScSZ) were investigated. By adding 3 mol% lithium, the densification temperature of ScSZ was reduced from the conventional temperature of 1400°C to 1200°C. It was found that Li doping also led to changes in the Zr:Sc ratio at the grain boundaries. Correspondingly, the dispersion of lithium zirconia at the grain boundaries accelerated the growth of ScSZ grains and increased the grain boundary resistance at temperatures below 450°C. At elevated temperatures of 450-750°C, the electrical conductivity of the ScSZ after doping remained almost unchanged under air and reducing atmospheres. These results suggest that the addition of lithium is promising for use in low temperature co-firing of ScSZ-based components for intermediate temperature solid oxide fuel cells.
AB - In this study, the effects of small amounts (≤3 mol%) of Li doping on the sintering characteristics and electrochemical performance of (ZrO 2)0.89(ScO1.5)0.1(ScSZ) were investigated. By adding 3 mol% lithium, the densification temperature of ScSZ was reduced from the conventional temperature of 1400°C to 1200°C. It was found that Li doping also led to changes in the Zr:Sc ratio at the grain boundaries. Correspondingly, the dispersion of lithium zirconia at the grain boundaries accelerated the growth of ScSZ grains and increased the grain boundary resistance at temperatures below 450°C. At elevated temperatures of 450-750°C, the electrical conductivity of the ScSZ after doping remained almost unchanged under air and reducing atmospheres. These results suggest that the addition of lithium is promising for use in low temperature co-firing of ScSZ-based components for intermediate temperature solid oxide fuel cells.
KW - Densification
KW - Electrical conductivity
KW - Electrolyte
KW - Scandia stabilized zirocnia
KW - Sintering additions
KW - Solid oxide fuel cells
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U2 - 10.4191/KCERS.2008.45.1.760
DO - 10.4191/KCERS.2008.45.1.760
M3 - Article
AN - SCOPUS:67649959026
SN - 1229-7801
VL - 45
SP - 760
EP - 765
JO - Journal of the Korean Ceramic Society
JF - Journal of the Korean Ceramic Society
IS - 12
ER -