Facile and Green Preparation for the Formation of MoO2-GO Composites as Anode Material for Lithium-Ion Batteries

A facile and green hydrothermal method has been developed to fabricate three-dimensional nanoarchitecture composites consisting of MoO 2 nanoparticles decorated on the graphene oxide (GO). The composites were characterized by XRD, SEM, and HRTEM. It was demonstrated that MoO 2 nanoparticles are 5–15 nm in size and homogeneously dispersed on GO and denoted as MoO 2 -GO composites. When tested as an anode material for lithium-ion batteries, the MoO 2 -GO composites exhibited an improved storage capacity and cycling performance, higher than the pure MoO 2 nanoparticles. As a result, the GO effectively forms a conductive network that greatly enhances the electrical conductivity and structural stability of composites. The incorporation of the flexible and conductive GO and the small homogeneous MoO 2 nanoparticles could not only maintain the structural and electrical integrity, but also accommodate the volume change during the lithium-ion intercalation and de-intercalation. The ultrafine MoO 2 nanoparticles dispersed on the GO are beneficial to the improved electrochemical performance of the composites, which makes them a promising anode candidate for lithium-ion batteries.