MEMBRANE-ELECTRODE ASSEMBLY AND FUEL CELL INCLUDING SAME

• Main Authors: SANGARAJU, Shanmugam, HAN, Da Bin, TSIPOAKA, Maxwell
• Format: Patent
• Language: English; French; Korean
• Published: 28.04.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A membrane-electrode assembly for a fuel cell, according to various embodiments of the present invention, comprises a polymer electrolyte membrane and electrode catalyst layers located on both surfaces of the polymer electrolyte membrane, wherein at least one of the polymer electrolyte membrane and the electrode catalyst layers may include a metal oxide of a perovskite structure, represented by chemical formula 1. [chemical formula 1] AxByOz, wherein x is 0.667 to 2, y is 1 to 2, Z is 3 to 7, A and B consist of cations, A having a larger ionic radius than that of B shares the vertices of oxide B, cation A is at least one selected from the group consisting of Na+, K+, Rb+, Ag+, Ca2+, Sr2+, Ba+2, Pb2+, La3+, Pr3+, Nd3+, Bi3+, Ce4+, and Th4+, and cation B is at least one selected from the group consisting of Li+, Cu2+, Mg2+, Ti3+, V3+, Cr3+, Mn3+, Fe4+, Co3+, Ni3+, Rh3+, Ti4+, Mn4+, Ru4+, Pt4+, Nb5+, Ta5+, Mo6+, and W6+. La présente invention concerne, selon divers modes de réalisation, un ensemble membrane-électrode pour une pile à combustible qui comprend une membrane électrolytique polymère et des couches de catalyseur d'électrode situées sur les deux surfaces de la membrane électrolytique polymère, la membrane électrolytique polymère et/ou les couches de catalyseur d'électrode pouvant comprendre un oxyde métallique d'une structure pérovskite, représenté par la formule chimique 1. [Formule chimique 1] AxByOz, dans laquelle x est compris entre 0,667 et 2, y est compris entre 1 et 2, Z est compris entre 3 et 7, A et B sont des cations, A présente un rayon ionique supérieur à celui de B, le cation A partage les sommets de l'oxyde du cation B, le cation A est choisi dans le groupe constitué par Na+, K+, Rb+, Ag+, Ca2+, Sr2+, Ba+2, Pb2+, La3+, Pr3+, Nd3+, Bi3+, Ce4+ et Th4+, et le cation B est choisi dans le groupe constitué par Li+, Cu2+, Mg2+, Ti3+, V3+, Cr3+, Mn3+, Fe4+, Co3+, Ni3+, Rh3+, Ti4+, Mn4+, Ru4+, Pt4+, Nb5+, Ta5+, Mo6+ et W6+. 본 발명의 다양한 실시예에 따른 연료전지용 막 전극 접합체는, 고분자 전해질 막 및 상기 고분자 전해질 막 양면에 위치하는 전극 촉매층으로 이루어지고, 상기 고분자 전해질 막 및 전극 촉매층 중 적어도 어느 하나는 하기 화학식 1로 표시되는 페로브스카이트 구조의 금속 산화물을 포함할 수 있다. [화학식 1] AxByOz 여기서, x는 0.667 내지 2이고, y는 1 내지 2이고, Z는 3 내지 7이고, A와 B는 양이온으로 구성되고, B보다 큰 이온 반경을 가지는 A가 B 산화물에 정점을 공유하여 형성되고, 양이온 A는 Na+, K+, Rb+, Ag+, Ca2+, Sr2+, Ba+2, Pb2+, La3+, Pr3+, Nd3+, Bi3+, Ce4+ 및 Th4+로 이루어진 군에서 선택된 어느 하나이고, 양이온 B는 Li+, Cu2+, Mg2+, Ti3+, V3+, Cr3+, Mn3+, Fe4+, Co3+, Ni3+, Rh3+, Ti4+, Mn4+, Ru4+, Pt4+, Nb5+, Ta5+, Mo6+및 W6+로 이루어진 군에서 선택된 어느 하나이다.