METHOD OF MANUFACTURING SOLID POLYMER ELECTROLYTE CONCENTRATED SOLUTION, COMPOSITION FOR BINDER, SOLID POLYMER ELECTROLYTE MEMBRANE, AND POLYMER ELECTROLYTE FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a solid polymer electrolyte concentrated solution, capable of sufficiently efficiently providing a concentrated solution having low viscosity and a low TI value.SOLUTION: A method of manufacturing a solid polymer electrolyte concentrated solution includes a concentration step of providing the solid polymer electrolyte concentrated solution by heating and concentrating a solution of a solid polymer electrolyte in a state of a liquid film.