A PHOSPHORIC ACID FUNCTIONALIZED MESOPOROUS SILICA/NAFION COMPOSITE MEMBRANE FOR HIGH TEMPERATURE PROTON EXCHANGE FUEL CELL AND THE MANUFACTURING METHOD OF THE SAME

摘要

The present invention relates to a proton exchange membrane fuel cell (PEMFC). Nafion, which is the most widely used as a separator of the proton exchange membrane fuel cell (PEMFC), has excellent thermal and chemical stability, but has an disadvantage of rapidly reducing of proton conductivity by moisture evaporation at a high temperature of at least 100 C. The phosphoric acid functionalized mesoporous Silica/Nafion composite membrane obtained according to the present invention has high moisture maintenance properties at a high temperature, and thereby, increasing performance of the proton exchange membrane fuel cell (PEMFC) operated at a high temperature of at least 100 C.