Simple solvent-free synthesis of rod-like Cu-doped V2O5 for high storage capacity cathode materials of lithium ion batteries

Rod-like Cu-doped V2O5 were synthesized by an extraordinary simple solid-state chemical route. Cu doping not only increases the cell volume, but also introduces abundant oxygen vacancies in V2O5 crystal lattice, which is benefit for fast electron and ion transport during charging-discharging process. As a result, the rod-like Cu-doped V2O5 exhibited a high discharge specific capacity of 293.1 mA h g(-1) at 1 C, much higher than the undoped V2O5 with the capacity of 235.5 mA h g(-1) and almost reaching to the theoretical capacity of 294 mA h g(-1). This simple and environment-friendly route to prepare advanced cathode shows great potential for industrial application in energy storage field. (C) 2019 Elsevier B.V. All rights reserved.