Structural And Electrochemical Characterization Of Xli[li_(1/3)mn_(2/3)]o_2·(1 -x)li[ni_(1/3)mn_(1/3)co_(1/3)]o_2 (0╭x╭0.9) As Cathode Materials For Lithium Ion Batteries

摘要

A series of cathode materials with molecular notation of xLi[Li_(1/3)Mn_(2/3)]O_2·(1 -x)Li[Ni_(1/3)Mn_(1/3)Co_(1/3)]O_2 (0≦x≦0.9) were synthesized by combination of co-precipitation and solid state calcination method. The prepared materials were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques, and their electrochemical performances were investigated. The results showed that sample 0.6Li[Li_(1/3)Mn_(2/3)]O_2·0.4Li[Ni_(1/3) Mn_(1/3)Co_(1/3)]O_2(x = 0.6) delivers the highest capacity and shows good capacity-retention, which delivers a capacity ～250mAh g~(-1) between 2.0 and 4.8 V at 18 mA g~(-1).