Self-anchoring dendritic ternary vanadate compound on graphene nanoflake as high-performance conversion-type anode for lithium ion batteries

Development of three-dimensional ternary vanadate compounds with excellent structural stability on exfoliated graphene nanoflacks allows the first success of conversion-type sodium vanadate anode candidate for high-rate and long-life lithium-ion batteries(LIBs). Corresponding additive-free self-anchoring behavior of active sodium vanadates material on graphene surface is representatively investigated, architecturing unique dendritic structure, a first-of-this-kind configuration, with robust flexibility and sufficient capability of structure-preservation. The prepared nanocomposite provides a high reversible capacity over 800 mA h g^-1 and ultrafast charging/discharging capability with Li-ions via conversion-type reaction. More remarkably, the well-designed structure retains more than 96% of initial capacity with respect to their ultralong cycling stability, demonstrating the combined advantages of the facile hydrothermal protocol, high active material loading and architecture configuration for high-performance Li-ions storage. As a consequence, this research reveals the importance and effectiveness of self-assembling sodium vanadates on graphene nanoflakes with 3D hierarchial structure and indicates the significant potential of developing ternary vanadate compounds as promising anode candidate for LIBs.