Proton conduction of MO-P2O5 glasses (M = Zn, Ba) containing a large amount of water

摘要

Zinc and barium phosphate glasses show good proton conductivity at intermediate temperature around 200 degrees C. Infrared spectra and H-1 magic angle spinning-nuclear magnetic resonance (MAS-NMR) spectra proposed that a 30 mol% ZnO-70 mol%P2O5 glass melted at 800 degrees C has a large amount of 'mobile' protons. The proton conductivity at 250 degrees C was measured to be 1 x 10(-3) S/cm. A H-2-air fuel cell using the ZnO-P2O5 glass electrolyte of 1.8 mm in thickness showed the maximum power density of 1.2 mW/cm(2) at 200 degrees C. (C) 2015 Elsevier Masson SAS. All rights reserved.