Strontium substituted sodium iron titanate as a possible sodium-ion conductor: Preliminary studies on preparation, crystalline transformation and conductivity

Abstract

The rising interest in sodium-ion batteries is due to the widespread geographical availability of sodium and to qualify as a possible sodium-ion conductor, the proposed material should possess formidable structural stability and high ion conductivity. In the current work, therefore, the feasibility of employing strontium substituted sodium iron titanate (Sr-SIT) as a possible sodium-ion conductor was investigated. Synthesis of SIT and Sr exchange was accomplished through solution route. The crystalline transformation of Sr-SIT was elucidated through TG-DTA and XRD analyses in the temperature range of473 to 1273 K of calcination. Sodium-ion conductivity was established by EMF measurements.