Abstract
The Li1.20+x Mn0.54Ni0.13Co0.13O2 (x = 0, 0.05, 0.10) cathode materials were synthesized via using co-precipitation method to obtain the [Mn0.54Ni0.13Co0.13](CO3)0.80 precursors and followed by 950 °C calcination process with different contents of LiOH·H2O. The morphology, micro-structural, and electrochemical properties of Li1.20+x Mn0.54Ni0.13Co0.13O2 (x = 0, 0.05, 0.10) cathode materials have been discussed by XRD, SEM and galvanostatic discharge–charge tests. All samples demonstrated the similar sphere-like secondary particles with an average diameter of 2–4 μm. The XRD results indicated that the proper excess Li+ could contribute to reducing the cation mixing degree between Li+ and Ni2+. When x = 0.05, the cathode demonstrated the optimal electrochemical properties with the initial discharge capacity of 278.5 mAh g−1, the capacity retention of 92.1% (194.7 mAh g−1) after 100 cycles and the discharge capacity of 104.5 mAh g−1 at 5 C rate.
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