Composite protonic solid electrolytes in the CsHSO4-SiO2 system

✍ Scribed by V.G. Ponomareva; N.F. Uvarov; G.V. Lavrova; E.F. Hairetdinov

• Book ID: 104296324
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 489 KB
• Volume: 90
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00410-9

✦ Synopsis

Transport, thermal and structural properties of the composite solid electrolytes (1 -x)CsHSO,-nSi0, (where x = O-0.8) were investigated. The composites were prepared by mechanical mixing of components followed by heating at temperatures near CsHSO, melting point (483 K). The dependence of low temperature phase conductivity on x has a maximum with a value 2.5 orders of magnitude higher than that of pure CsHSO, and conductivity is governed by protons. Heterogeneous doping is shown to change markedly the thermodynamic parameters of the ionic component. The phase transition temperature CsHSO, in the composites decreases from 414 to 350 K with the increase of the content of heterogeneous additive SiO, from 0 to 0.7. As x raises CsHSO, the amorphization takes place and the relative change of ionic conductivity at phase transition diminishes, the phase transition becomes diffusive and disappears for the 0.2CsHSO,-0.8Si0, composite.