MoO₃/Carbon Dots Composites for Li‐Ion Battery Anodes

Abstract A rice krispies sphere constructed by hundreds of MoO₃ nanoparticles of ∼100 nm with carbon dots of ∼5 nm (MoO₃/CDs) is created via a one‐pot hydrothermal synthesis process using CDs as nucleation seeds. The MoO₃/CDs shows a reversible capacity of 897.5 mAh g⁻¹ after 100 cycles at a current density of 0.1 A g⁻¹ as an anode material for lithium‐ion battery. Moreover, a discharge capacity of 507 mAh g⁻¹ is achieved after 255 full cycles under a high current density of 0.5 A g⁻¹. The electrochemical performance of the MoO₃/CDs is promising due to the MoO₃ nanoparticles connected by ultrafine CDs with excellent conductivity. The unique structure effectively alleviate the volume change during the charging/discharging process and improve the ionic and electronic mobility to enhancing the reversible reaction of MoO₃.