Carbon-Coated SnO2/Ti3C2 Composites with Enhanced Lithium Storage Performance.

Tin-based anode materials including oxides, composites oxides, and tin-based alloys are identified as promising candidates for energy storage attributed to the highest theoretical specific capacity. We introduce Ti₃C₂-MXene as structural skeletons and amorphous carbon as conductive networks for tin oxide in this work. Herein, carbon-coated kernel-like SnO₂ coupling with two-dimensional (2D) layered structure Ti₃C₂-MXene (C@SnO₂/Ti₃C₂) composites were prepared by a hydrothermal reaction and a further calcination process. The fabricated C@SnO₂/Ti₃C₂ nanocomposites exhibit smaller charge transfer resistance, larger Li⁺ diffusion coefficient, and better cycling stability than SnO₂/Ti₃C₂ and pure Ti₃C₂. Most of all, C@SnO₂/Ti₃C₂ nanocomposites display excellent initial capacity of 1531.5 mAh g⁻¹ at current density of 100 mA g⁻¹ and show outstanding rate performance of 540 mAh g⁻¹even after 200 cycles. In our work, we will provide a new research idea for the composite materials of metal oxides and two-dimensional layered materials in the field of electrode materials for batteries. [ABSTRACT FROM AUTHOR]