POLYMER ELECTROLYTE MEMBRANE FOR A FUEL CELL, METHOD FOR MANUFACTURING SAME, AND FUEL CELL COMPRISING SAME

摘要

The present disclosure relates to a polymer electrolyte membrane containing polybenzimidazole for a fuel cell and to a method for manufacturing the same. In the polymer electrolyte membrane containing polybenzimidazole for a fuel cell according to the present disclosure, carbon black or a metal-grafted porous filler based on carbon black or carbon black and silica is efficiently dispersed in polybenzimidazole, and physically and chemically bound with polybenzimidazole, and thus the polymer electrolyte membrane has excellent mechanical and thermal properties, can improve impregnating efficiency of phosphoric acid to exhibit high proton conductivity, and can reduce deterioration in ion conductivity of the electrolyte membrane due to the leakage of phosphoric acid.

主权项

1. A polymer electrolyte membrane for a fuel cell, comprising: a polybenzimidazole polymer; and carbon black, wherein the polybenzimidazole is a polymer including at least one of the repeating units represented by the following Chemical Formula 1-Chemical Formula 4, and the carbon black is used in m amount of 1-50 parts by weight based on 100 parts by weight of the polybenzimidazole polymer: wherein n is an integer of 50-100,000.