POLYMER ELECTROLYTE MEMBRANE, METHOD FOR MANUFACTURING SAME, AND MEMBRANE ELECTRODE ASSEMBLY COMPRISING SAME

Abstract

Disclosed are a polymer electrolyte membrane, a method of manufacturing the same, and a membrane-electrode assembly including the same. The polymer electrolyte membrane comprises a porous support having a plurality of pores, a first layer including a first ion conductor that fills the pores adjoining one surface of the porous support, and a second layer including a second ion conductor that fills the pores adjoining the other surface of the porous support, wherein the first ion conductor and the second ion conductor are different from each other, and one selected from the group consisting of the first layer, the second layer, and a combination thereof includes an organic-based antioxidant. The shape stability of the polymer electrolyte membrane is excellent, and the polymer electrolyte membrane has improved tolerance to radicals generated during the operation thereof. Consequently, the polymer electrolyte membrane exhibits high stability against radicals, i.e. high chemical stability. In addition, hydrogen permeability is reduced while the ion conductivity of the polymer electrolyte membrane is excellent.

IPC Classifications