H-2/O-2 fuel cells equipped with proton-conducting Nafione (R)/phosphosilicate (NPS) glass membranes, which are prepared from phosphosilicate glass and a perfluorosulfonic acid polymer, are characterized, and their performances are improved step by step by using Nafion (R) resin as an adhesive, increasing operation temperature, adopting a thin-film pressure sensor, and reducing glass membrane thickness. Finally, the fuel cell with a 500 mu m thick NPS glass membrane releases a peak power density of 207 mW cm(-2) at 70 degrees C. (C) 2012 Elsevier B.V. All rights reserved.