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http://dx.doi.org/10.4191/kcers.2014.51.1.051

Electrochemical Performance of a Nd2-xSrxNiO4+δ/GDC(x = 0, 0.4, 0.6) as a SOFC Cathode Material  

Lee, Kyoung-Jin (Division of Material Science and Engineering, Inha University)
Seo, Jeong-Uk (Division of Material Science and Engineering, Inha University)
Lim, Ye-Sol (Division of Material Science and Engineering, Inha University)
Hwang, Hae-Jin (Division of Material Science and Engineering, Inha University)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.1, 2014 , pp. 51-56 More about this Journal
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.
Keywords
Solid oxide fuel cells; $Nd_{2-x}Sr_xNiO_{4+\delta}$; Strontium; Electrical conductivity; Excess oxygen;
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