Facile Preparation and Electrochemical Performances of LiMn2O4/Li1.2(Mn0.56Ni0.16Co0.08)O2 Blend Cathode Materials for Lithium Ion Battery

The blend cathode materials LiMn2O4/Li1.2(Mn0.56Ni0.16Co0.08)O2 have been successfully prepared by the physical mixing of commercial Li2MnO4 and self-prepared Li1.2(Mn0.56Ni0.16Co0.08)O2 nanoparticles. The structures, morphologies and electrochemical performances are characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Cyclic Voltammetry (CV) and charge-discharge test, and the results show that the good mass ratio of Li2MnO4 and Li1.2(Mn0.56Ni0.16Co0.08)O2 is 50:50. Therein, the nanosized Li1.2Ni0.16Co0.08Mn0.56O2 uniformly adhere on the surface of Li2MnO4 micro structure, and occupy the gap of Li2MnO4 particles, which can effectively elevate the tap density of Li1.2(Mn0.56Ni0.16Co0.08)O2 nanoparticles. As lithium ion battery cathode, the 50:50 sample reveals an initial discharge capacity of 265.4 mAh/g with negligible irreversible capacity loss at current density of 0.1C within 2.0-4.8 V, and retain 89.2% after 20 cycles.