Efficient, anhydrous proton-conducting nanofilms of Y-doped zirconium pyrophosphate at intermediate temperatures

composition of Y(0.9)5/Y-0.05/P-2.64, exhibit high proton conductivities with an area-specific resistance of 0.085 Omega cm(2). The films are very stable, even when operating in the flow of dry air at 340 degrees C for a prolonged period of time (see figure).