TiO2–Fe2O3 nanocomposites as high-capacity negative electrode materials for rechargeable sodium-ion batteries

Abstract

In this study, we report TiO₂–Fe₂O₃ nanocomposites as high-capacity negative electrode materials for rechargeable sodium-ion batteries with an ionic liquid electrolyte. The TiO₂–Fe₂O₃ electrode in the Na[FSA]-[C₃C₁pyrr][FSA] (FSA = bis(fluorosulfonyl)amide; C₃C₁pyrr = N-methyl-N-propylpyrrolidinium) ionic liquid electrolyte at 363 K delivers a high reversible capacity exceeding 360 mA h g⁻¹ at a current density of 10 mA g⁻¹, exhibiting good rate capability and cycling performance.