Correlation between Protonic Conductivity and Structure of Phosphate Glasses for Intermediate Temperature Fuel Cells

We measured NMR, Raman spectra and AC impedance for BaO-ZnO-P2O5 glasses. The short-range order of these glasses was based on metaphosphate (QP2) structure. A part of O-P-O bonding was broken and the mobile proton concentration increased for ternary BaO-ZnO-P2O5 glasses. The protonic conductivity wa...

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Bibliographic Details
Published inECS transactions Vol. 50; no. 27; pp. 187 - 191
Main Authors Sumi, Hirofumi, Fujishiro, Yoshinobu, Oine, Takahiro, Kasuga, Toshihiro
Format Journal Article
LanguageEnglish
Published The Electrochemical Society, Inc 01.04.2013
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Summary:We measured NMR, Raman spectra and AC impedance for BaO-ZnO-P2O5 glasses. The short-range order of these glasses was based on metaphosphate (QP2) structure. A part of O-P-O bonding was broken and the mobile proton concentration increased for ternary BaO-ZnO-P2O5 glasses. The protonic conductivity was 2 × 10-7 S/cm for 30 mol%ZnO-10 mol%BaO-60 mol%P2O5 glass at 200 oC. Co-doping of the cations with different coordinate numbers is effective to improve the protonic conductivity for phosphate glasses.
ISSN:1938-5862
1938-6737
DOI:10.1149/05027.0187ecst