Polymer electrolyte membrane comprising 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 increase a permeation rate of water and decrease a permeation rate of methanol using a microporous titanium silicate particle, thereby improving current density and maximum power density. A polymer electrolyte membrane for a direct methanol fuel cell comprises the following steps of: preparing a microporous titanium silicate particle whose pore size is larger than a water molecule and smaller than a methanol molecule; evenly mixing a plurality of microporous titanium silicate particles to a polymer solution for an ion exchange film; evaporating a solvent of the mixing solution; and heating a solvent evaporated resultant to obtain a polymer electrolyte film.