US 12,407,012 B2
Solid electrolyte assembly having intermediate layer
Shingo Ide, Ageo (JP); Kengo Shimanoe, Fukuoka (JP); Ken Watanabe, Fukuoka (JP); and Koichi Suematsu, Fukuoka (JP)
Assigned to MITSUI MINING & SMELTING CO., LTD., (JP)
Appl. No. 17/045,921
Filed by Mitsui Mining & Smelting Co., Ltd., Tokyo (JP)
PCT Filed Apr. 16, 2019, PCT No. PCT/JP2019/016282
§ 371(c)(1), (2) Date Oct. 7, 2020,
PCT Pub. No. WO2019/203219, PCT Pub. Date Oct. 24, 2019.
Claims priority of application No. 2018-079456 (JP), filed on Apr. 17, 2018.
Prior Publication US 2021/0036354 A1, Feb. 4, 2021
Int. Cl. H01M 8/1213 (2016.01); H01M 4/86 (2006.01); H01M 4/90 (2006.01); H01M 8/12 (2016.01); H01M 8/1246 (2016.01)
CPC H01M 8/1213 (2013.01) [H01M 4/86 (2013.01); H01M 4/9033 (2013.01); H01M 8/1246 (2013.01); H01M 2008/1293 (2013.01); H01M 2300/0074 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A solid electrolyte assembly comprising:
an anode, a cathode, and a solid electrolyte located therebetween,
wherein an intermediate layer is provided between at least one of the anode and the cathode and the solid electrolyte,
the intermediate layer is made of a cerium oxide containing lanthanum and a rare-earth element Ln, and the rare-earth element Ln represents samarium or gadolinium,
an atom ratio Ln/Ce in the cerium oxide containing lanthanum and the rare-earth element Ln is in a range of 0.2 to 0.5,
an atom ratio La/Ce in the cerium oxide containing lanthanum and the rare-earth element Ln is in a range of 0.5 to 1.2,
the solid electrolyte contains an oxide of lanthanum, and
either the anode or the cathode is composed of an oxide, the oxide has a perovskite structure of ABO3-δ having an A site and a B site, and a combination of the A site and the B site is one of:
(i) the A site consisting of lanthanum and strontium, and the B site consisting of iron, cobalt, and nickel;
(ii) the A site consisting of lanthanum and barium, and the B site consisting of iron;
(iii) the A site consisting of barium, and the B site consisting of iron and copper; and
(iv) the A site consisting of lanthanum and barium, and the B site consisting of iron and copper, and
wherein a value of a ratio P1/P2 is 0.04 or greater and 0.095 or less, where the ratio P1/P2 is a ratio of a primary particle size P1 (nm) to a secondary particle size P2 (nm), and the primary particle size P1 and the secondary particle size P2 are obtained through small-angle X-ray scattering measurement of the oxide having the perovskite structure, and
at least one of the anode and the cathode is made of a porous body.