US 11,855,309 B2
Interconnect for a solid oxide fuel cell, its manufacturing method, and a solid oxide fuel cell
Tai Min Noh, Daejeon (KR); Daehwan Kim, Daejeon (KR); Chanyeup Chung, Daejeon (KR); Sanghyun Park, Daejeon (KR); Changseok Ryoo, Daejeon (KR); and Kwangwook Choi, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/641,093
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 6, 2018, PCT No. PCT/KR2018/010433
§ 371(c)(1), (2) Date Feb. 21, 2020,
PCT Pub. No. WO2019/050301, PCT Pub. Date Mar. 14, 2019.
Claims priority of application No. 10-2017-0115336 (KR), filed on Sep. 8, 2017.
Prior Publication US 2020/0194807 A1, Jun. 18, 2020
Int. Cl. H01M 8/12 (2016.01); H01M 8/0228 (2016.01); C25D 5/50 (2006.01); H01M 8/0217 (2016.01)
CPC H01M 8/0228 (2013.01) [C25D 5/50 (2013.01); H01M 8/0217 (2013.01); H01M 2008/1293 (2013.01)] 12 Claims
OG exemplary drawing
 
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.