Nano-TiO2-coated polymer electrolyte membranes for direct methanol fuel cells

Abstract Composite polymer electrolyte membranes with nano-TiO2 films are fabricated by deposition of titania nanoparticles from a sol solution. Measurements of ion conductivity, methanol permeability and single-cell performance of the modified Nafion membranes are conducted. The TiO2 films adhere well and are crack-free. The protonic conductivity of the composite membranes decreases with incr…