Influence of hydration on the dielectric properties of the high permittivity material Rb2Ti2O5

Previous results have reported a huge equivalent relative permittivity of up to 10
⁹
for the solid electrolyte material Rb
₂
Ti
₂
O
₅
(RTO) together with a high ionic conductivity between 200 K and 300 K when placed under voltage between two metallic electrodes. More recently, space charge measurements have highlighted the strong water content dependence on the charge accumulation taking place at the anode interface inside the RTO material. In this paper, dielectric spectroscopy measurements were carried out in order to better understand the effect of hydration on the dielectric properties of RTO.