Ion transport property studies of a new TiO2 dispersed Na+ ion conducting nanocomposite polymer electrolytes

Abstract Ion transport property studies of a new Na+ ion conducting nanocomposite polymer electrolytes (NCPEs): (1-x) [75PEO:25NaPO3] + x TiO2 where 0 ≤ x ≤ 18 wt%, are reported. The present NCPEs films have been casted using a recently developed hot-press method. The maximum ionic conductivity (σ ∼ 2.3 × 10-5 S.cm−1) have been obtained at the composition: [95(75PEO:25NaPO3) + 5 TiO2] and this has been referred to as optimum conducting composition (OCC). Ion transport properties have been explained with the help of some basic ionic parameters viz. ionic conductivity (σ), ionic mobility (μ), mobile ion concentration (n) and ionic transference number (tion). To compute the activation energy (Ea) values of different samples, temperature dependent ionic conductivity studies have been done. Solid state polymer battery was fabricated using the NCPE OCC as an electrolyte and studied their cell performances.