Nanosheet-structured LiV3O8 with high capacity and excellent stability for high energy lithium batteries

Abstract

Highly stable LiV₃O₈ with a nanosheet-structure was successfully prepared using polyethylene glycol (PEG) polymer in the precursor solution as the structure modifying agent, followed by calcination in air at 400 °C, 450 °C, 500 °C, and 550 °C. These materials provide the best electrochemical performance ever reported for LiV₃O₈ crystalline electrodes, with a specific discharge capacity of 260 mAh g⁻¹ and no capacity fading over 100 cycles at 100 mA g⁻¹. The excellent cyclic stability and high specific discharge capacity of the material are attributed to the novel nanosheets structure formed in LiV₃O₈. These LiV₃O₈ nanosheets are good candidates for cathode materials for high-energy lithium battery applications.