主权项 |
1. A method for manufacturing a composite electrolyte membrane for a fuel cell comprising a microporous polymer substrate and a sulfonated polymer electrolyte, the method comprising:
a first step of applying a first non-fluorinated sulfonated polymer electrolyte solution onto a base to form a first polymer electrolyte layer; a second step of stacking a non-fluorinated microporous polymer substrate on the first polymer electrolyte layer and allowing a second non-fluorinated sulfonated polymer electrolyte solution to infiltrate into pores of the microporous polymer substrate; a third step of applying a third non-fluorinated sulfonated polymer electrolyte solution onto the microporous polymer substrate impregnated with the second polymer electrolyte to form a third polymer electrolyte layer; and a fourth step of removing the base used for forming the first polymer electrolyte layer in the first step, wherein the second polymer electrolyte solution contains a surfactant, and both the first polymer electrolyte solution and the third polymer electrolyte solution contain no surfactant, wherein the second step is performed by allowing the microporous polymer substrate to be impregnated with the second polymer electrolyte solution via a solution pouring process, wherein the first polymer electrolyte solution, the second polymer electrolyte solution and the third polymer electrolyte solution are independently selected from the group consisting of homopolymers, alternating copolymers, random copolymers, block copolymers, multiblock copolymers, and graft copolymers, and wherein the first polymer electrolyte solution, the second polymer electrolyte solution and the third polymer electrolyte solution independently comprises at least one sulfonated hydrocarbon-based polymer selected from the group consisting of sulfonated poly(arylene ethers), sulfonated poly(imides), sulfonated poly(amides), sulfonated polyphosphazene, sulfonated radiation-grafted FEP-g-polystyrene, sulfonated radiation-grafted ETFE-g-polystyrene, sulfonated poly(ether ketone) and sulfonated radiation-grafted PVDF-g-polystyrene. |