A nest-like hierarchical porous V2O5 as a high-performance cathode material for Li-ion batteries

摘要

In this article, V2O5 with a novel nest-like hierarchical porous structure has been synthesized by a facile solvothermal method and investigated as cathode material for lithium-ion batteries. The nest-like V2O5 with a diameter of about 1.5 mu m, was composed of interconnected nanosheets with a highly porous structure. Without other modification, the as-prepared V2O5 electrode exhibited superior capacity. An initial discharge capacity of 330 mAh g(-1) (at a current density of 100 mA g(-1)) could be delivered and a stable discharge capacity of 240 mAh g(-1) after 50 cycles is maintained. The excellent performance was attributed to the hierarchical porous structure that could buffer against the local volume change and shorten the lithium-ions diffusion distance. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.