Controllable synthesis of 3D Urchin-like V2O5 as high-stability for Lithium-ion battery cathodes

Abstract

A facile technique was used to prepare self-assembled 3D urchin-like V2O5 under solvothermal condition. The 3D urchin-like V2O5 could provide high Li[Formula: see text] capacity with excellent rate performance, presenting a high reversible discharge capacity of 271.6[Formula: see text]mAh[Formula: see text]g[Formula: see text], at 0.1[Formula: see text]C. At current density of 1[Formula: see text]C, it shows a high reversible capacities of 209[Formula: see text]mAh[Formula: see text]g[Formula: see text] with capactity retention of 91.8% (191[Formula: see text]mAh[Formula: see text]g[Formula: see text]) after 380 cycles. Even at 2[Formula: see text]C and 5[Formula: see text]C, the capacity displays 172.4 and 129.24[Formula: see text]mAh[Formula: see text]g[Formula: see text]. The above enhanced performance is caused from greatly enhanced charge transportation, which closely relates to the structural stability and more channels for Li[Formula: see text] transfer of the unique 3D urchin-like V2O5.