LAUSR

The electrochemical performances of Li1.2Mn0.54Ni0.13Co0.13O2 cathode material are enhanced through hydrothermal approach using Na2S solution as a medium. Furthermore, the influence of contents of Na2S solution on the morphology, structure, and electrochemical performances is fully investigated. The results indicate that a high content of Na2S solution results in the formation of spinel particles which are detected by SEM, XRD, and HR-TEM measurements. The formation of spinel particles leads to a deterioration of electrochemical performances. However, a low content of Na2S solution results in a slight structure change from layered phase to spinel one near the edge of Li1.2Mn0.54Ni0.13Co0.13O2 particles. This slight structure change facilitates the decrease of charge transfer resistance, which contributes to the enhanced rate capability of Na2S-treated Li1.2Mn0.54Ni0.13Co0.13O2.