Synthesis of Porous Carbon Nanotubes@LiVTiO₄ Composites and Their Advanced Electrochemical Properties for Lithium‐Ion Batteries

Abstract

Carbon nanotubes (CNTs)@LiVTiO4 composites are successfully constructed by a series of treatments, including sol–gel method, solid phase grinding, and a subsequent calcination procedure. In the composite, some LiVTiO4 nanoparticles are adhered on the surface of the bamboo‐like CNTs, whereas others are embedded in the walls of CNTs. As the anode for lithium‐ion batteries, the CNTs@LiVTiO4 nanocomposite delivers a high specific capacity of 346 mA h g−1 after 500 cycles at 0.2 A g−1. Even at a high current density of 5 A g−1, the electrode still maintains the capacity of 111.1 mA h g−1 after 1000 cycles. The excellent electrochemical performance is attributed to the unique structure of CNTs@LiVTiO4, which can successfully prevent the pulverization and aggregation of LiVTiO4 nanoparticles and enhance the electrical conductivity. All these favorable factors make CNTs@LiVTiO4 a promising anode material for stable, safe, and high‐energy lithium‐ion batteries.