TY - SER AU - Noto, Vito Di AU - Boaretto, Nicola AU - Negro, Enrico TI - Inorganic-Organic Membranes Based on Nafion, [(Zro2)·(Hfo2)0.25] and [(Sio2)·(Hfo2)0.28] Nanoparticles. Part II: Relaxations and Conductivity Mechanism KW - Hybrid Inorganic-Organic Proton-Conducting Membranes KW - Nafion KW - Polymer Electrolyte Membrane Fuel Celi (Pemfc) ER -