TiO2-modified two-dimensional composite of nitrogen-doped molybdenum trioxide nanosheets as a high-performance anode for lithium-ion batteries

Abstract

Nitrogen-doped molybdenum trioxide (MoO₃/NC) has drawbacks such as volume expansion during long-term charging and discharging cycles, which severely limit its further application. This work proposes the addition of titanium dioxide nanoparticles (TiO₂ NPs) for performance improvement of MoO₃/NC. TiO₂ NPs embedded on the surface of a MoO₃/NC nanosheet can alleviate its volume expansion and the accumulation of lithiated products and improve the conductivity of the electrode material. The results show that the MoO₃/NC nanosheet decorated with TiO₂ NPs (TiO₂@MoO₃/NC), when used as an electrode material, exhibited a discharge specific capacity of 419 mA h g⁻¹ at a current density of 0.05 A g⁻¹ and retained a discharge specific capacity of 517 mA h g⁻¹ after 600 cycles at a current density of 1 A g⁻¹.