Rational design and preparation of few-layered MoSe2 nanosheet@C/TiO2 nanobelt heterostructures with superior lithium storage performance

Abstract

A heterostructure of MoSe₂ nanosheets decorated on C/TiO₂ nanobelts was successfully fabricated through a facile hydrothermal process with the assistance of glucose. Ultrathin MoSe₂ nanosheets fully covered on TiO₂ nanobelts were coupled with carbon components as strong skeletons, which possess high contact surface area, efficient electronic transport frameworks and sufficient void spaces. As expected, the MoSe₂@C/TiO₂ heterostructures exhibit remarkable cycling stability (discharge capacity of 987.4 mA h g⁻¹ after 100 cycles at a current density of 500 mA g⁻¹) and rate capability (retained capacity of 860 mA h g⁻¹ even at a current rate of 3000 mA g⁻¹) as anode materials in lithium-ion batteries. The excellent electrochemical performance can be attributed to the structural advantages of MoSe₂@C/TiO₂ heterostructures, enabling great potential as anode materials in lithium-ion batteries.