MoO3/Carbon Dots Composites for Li‐Ion Battery Anodes

Abstract

AbstractA 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.