CPC H01M 8/0228 (2013.01) [C25D 5/50 (2013.01); H01M 8/0217 (2013.01); H01M 2008/1293 (2013.01)] | 12 Claims |
1. An interconnect for a solid oxide fuel cell, comprising:
a conductive substrate having a first and a second surface; and
a ceramic protective layer present on one or both of the first and the second surface of the conductive substrate,
wherein the ceramic protective layer comprises a spinel structure oxide represented by Formula 2 below:
NiaA′1-aCobB′2-bO4 [Formula 2]
wherein in Formula 2, A′ is one or more element selected from the group consisting of Mg, Fe, Mn, Cr and Zn; B′ is one or more element selected from the group consisting of Al, Fe, Cr and Mn; 0<a<1; and 0<b<2;
wherein the ceramic protective layer further comprises one or more cobalt-based oxide selected from the group consisting of Co3O4, CoCr2O4 and CoFe2O4,
wherein an average value of a ratio of an atomic percentage (at %) of the Co to an atomic percentage (at %) of the Ni in the ceramic protective layer is 3 to 5, measured at two or more points of the ceramic protective layer,
wherein the ceramic protective layer has an area specific resistance (ASR) analyzed as a function of the atomic percentage of Ni and Co of 0.05 Ω·cm−2 or less as measured in an air atmosphere at 650° C., and
wherein the ceramic protective layer has a thickness ranging from 5 μm to 20 μm.
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