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J. Korean Ceram. Soc. > Volume 51(1); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(1): 51-56.
doi: https://doi.org/10.4191/kcers.2014.51.1.051
Nd2-xSrxNiO4+δ/GDC(x = 0, 0.4, 0.6) 공기극의 전기화학특성 평가
이경진, 서정욱, 임예솔, 황해진
인하대학교 세라믹공학과
Electrochemical Performance of a Nd2-xSrxNiO4+δ/GDC(x = 0, 0.4, 0.6) as a SOFC Cathode Material
Kyoung-Jin Lee, Jeong-Uk Seo, Ye-Sol Lim, Hae-Jin Hwang
Division of Material Science and Engineering, Inha University
ABSTRACT
Mixed ionic and electronic conducting $K_2NiF_4$-type oxide, $Nd_{2-x}Sr_xNiO_{4+delta}$ (x = 0, 0.4, 0.6) powders were synthesized by a solid-state reaction technique and solid oxide fuel cells consisting of a $Nd_{2-x}Sr_xNiO_{4+delta}-GDC$ cathode, a Ni-YSZ anode and 8YSZ as an electrolyte were fabricated. The effect of strontium substitution for neodymium on the electrical and electrochemical properties was examined. The electrical conductivity increased with an increase in the Sr doping content, while it appears that the excess oxygen (${delta}$) decreased. Sr doping into $Nd_2NiO_{4+delta}$ resulted in an increase in the cathode polarization resistance and an decrease in the power density of the cell. These phenomena may be associated with the decreased amount of excess oxygen noted in the $Nd_{2-x}Sr_xNiO_{4+delta}$ cathode.
Key words: Solid oxide fuel cells, $Nd_{2-x}Sr_xNiO_{4+delta}$, Strontium, Electrical conductivity, Excess oxygen
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