Patent ID: 11946151
Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. An electrolytic cell comprising:
a cathode,
an anode, and
a solid electrolyte having oxide ion conductivity;
wherein
the cathode is following (A) or (B):
(A) the cathode comprises a metal and a first mayenite-type compound, or
(B) the cathode comprises a metal and a second mayenite-type compound, wherein the second mayenite-type compound comprises a mayenite-type compound having electronic conductivity;
each of the first mayenite-type compound and the second mayenite-type compound is a mayenite-type compound having a representative composition represented by 12CaO·7A2O3;
the first mayenite-type compound and the second mayenite-type compound are the same or different; and
the mayenite-type compound comprises Al and at least one element selected from the group consisting of Ca and Sr, and a molar ratio of a sum of CaO and SrO to Al2O3 in terms of oxides is 12.6: 6.4 to 11.7:7.3;
the cathode is a cathode for decomposing carbon dioxide;
the cathode is at least one selected from the group consisting of (a1), (a2), (b1) and (b2):
(a1) the cathode comprising a sintered product of a mixture comprising the powder of the metal and the first mayenite-type compound;
(a2) the cathode comprising a reduced and sintered product of a mixture comprising the powder of an oxide of the metal and the first mayenite-type compound;
(b1) the cathode comprising a sintered product of a mixture comprising the powder of the metal and the second mayenite-type compound, and the second mayenite-type compound has electron conductivity; and
(b2) the cathode comprising a reduced and sintered product of a mixture comprising the powder of the metal oxide and the second mayenite-type compound, and the second mayenite-type compound has electron conductivity;
the solid electrolyte is a third mayenite-type compound;
the third mayenite-type compound is the mayenite-type compound having the representative composition represented by 12CaO·7Al2O3; and
the third mayenite-type compound is the same as or different from the first mayenite-type compound or the second mayenite-type compound.