Preparation and electrochemical performance of biomass-derived porous carbon/MoO2@TiO2 composite as anode materials for lithium-ion batteries

Abstract

Biomass-derived porous carbon/MoO2@TiO2 (LC/MoO2@TiO2) anode materials were prepared via hydrothermal route for lithium-ion batteries (LIBs). Transmission electron microscopy and energy dispersive X-ray spectroscopy of LC/MoO2@TiO2 showed that MoO2 and TiO2 nanoparticles were uniformly embedded in the porous and surface of honeycomb porous carbon (LC). The LC/MoO2@TiO2 anode exhibits excellent rate capability and maintains a stable specific capacity of ∼600 mAhg−1 at a current density of 100 mAg−1 after 100 cycles. Moreover, at a current density of 500 mAg−1 its reversible capacity can reach 310 mAhg−1 after 250 cycles. Therefore, the structure of MoO2 and TiO2 nanoparticles anchored of a porous LC can not only buffer the volume change during lithiation /delithiation process but also provide more active surface area, and more convenient and efficient channel for lithium-ion transport and storage.