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 MoO₂ nanoparticles decorated on the graphene oxide (GO). The composites were characterized by XRD, SEM, and HRTEM. It was demonstrated that MoO₂ nanoparticles are 5–15 nm in size and homogeneously dispersed on GO and denoted as MoO₂-GO composites. When tested as an anode material for lithium-ion batteries, the MoO₂-GO composites exhibited an improved storage capacity and cycling performance, higher than the pure MoO₂ 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 MoO₂ 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 MoO₂ 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