ABSTRACT
Polymer electrolyte membrane (PEM) is one of the key components of a PEM fuel cell. It serves both as an electrolyte and as a separator to prevent direct physical mixing of the hydrogen from the anode and oxygen supplied to the cathode. PEM contains ionizable groups, in which protons (mobile cations) are electrostatically associated with the xed anionic charges on the polymer. The protons
20.1 Introduction ................................................................................................ 681 20.2 Membrane Preparation and Physical Properties Evaluation ...................... 685
20.2.1 Effect of Solvent ........................................................................... 685 20.2.1.1 On Morphology ............................................................ 685 20.2.1.2 On Thermal Properties .................................................686 20.2.1.3 On Solution Viscosity ..................................................687 20.2.1.4 On Rheology ................................................................691
