US 12,191,544 B2
Membrane electrode assembly, electrochemical device, and electrochemical system
Shigenori Onuma, Kyoto (JP); and Tomohiro Kuroha, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Sep. 6, 2021, as Appl. No. 17/467,314.
Application 17/467,314 is a continuation of application No. PCT/JP2020/010040, filed on Mar. 9, 2020.
Claims priority of application No. 2019-086176 (JP), filed on Apr. 26, 2019.
Prior Publication US 2021/0399325 A1, Dec. 23, 2021
Int. Cl. H01M 8/1213 (2016.01); H01M 4/86 (2006.01); H01M 4/90 (2006.01); H01M 8/1004 (2016.01)
CPC H01M 8/1213 (2013.01) [H01M 4/8657 (2013.01); H01M 4/9033 (2013.01); H01M 8/1004 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A membrane electrode assembly comprising:
an electrolyte membrane containing a solid electrolyte; and a first electrode bonded to the electrolyte membrane,
wherein the solid electrolyte is a compound represented by a composition formula (1): BaZr1-xMxO3-γ,
M in the composition formula (1) is at least one element selected from the group consisting of Sc, Er, Ho, Dy, Gd, Y, In, Tm, Yb, and Lu, and 0.05<x<0.3 and 0<γ<0.5 are satisfied,
the first electrode contains a lanthanum strontium cobalt iron palladium composite oxide,
the lanthanum strontium cobalt iron palladium composite oxide is a compound represented by a composition formula (2): La1-mSrmCOyFezPd1-y-zO3-δ,
0≤m≤0.5, 0.1≤y≤0.9, 0.1≤z≤0.9, y+z<1, and 0≤δ≤0.5 are satisfied in the composition formula (2), and
the lanthanum strontium cobalt iron palladium composite oxide satisfies 0.01≤1−y−z≤0.05 in the composition formula (2).