POLYMER ELECTROLYTE MEMBRANE COMPRISING SULFATED CYCLODEXTRIN AND MICROPOROUS TITANOSILICATE PARTICLES FOR DIRECT METHANOL FUEL CELL AND METHOD OF PREPARING THE SAME AND MEMBRANE ELECTRODE ASSEMBLY AND DIRECT METHANOL FUEL CELL USING THE SAME

摘要

A polymer electrolyte membrane for a direct methanol fuel cell is provided to suppress a crossover phenomenon of a methanol to increase selectivity using a sulfation cyclodextrin and microporous titanium silicate particle dispersed in an ion exchange film matrix respectively. A polymer electrolyte membrane for a direct methanol fuel cell comprises a first polymer electrolyte layer and a second polymer electrolyte layer. The first polymer electrolyte layer is formed by an ion exchange film matrix dispersed in a sulfation cyclodextrin. The second polymer electrolyte layer is formed by the ion exchange film matrix where a plurality of microporous titanium silicate particle whose pore size is larger than a water molecule and smaller than a methanol molecule are dispersed.