Organic/inorganic composite blend membrane compositions of polyelectrolyse blends with nanoparticles

The invention relates to composite blend membranes formed from blends of one or more polyelectrolytes, and one or more types of nanoparticles. Preferably the blend also includes one or ore fluoropolymers. The addition of the nanoparticles was found to enhance the conductivity and mechanical properties of the membranes.