Comparison of electrochemical properties for lithium-rich cathode material Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ prepared by two methods

Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ materials for lithium-ion battery have been successfully synthesized by gel-combustion (GC) and sol-gel (SG) methods. The as-prepared materials were characterized by XRD, SEM and electrochemical measurements. The XRD patterns show that the Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ materials obtained from different methods both form a pure phase with well crystallization. SEM images present that Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ obtained from gel-combustion method (GC-material) exhibited the relatively uniform distribution in particle size. The results of electrochemical measurements indicate that the GC-material showed the higher discharge capacity at 0.1C and lower solid electrolyte interface resistance and charge transfer resistance, while, the cycling stability of GC-material tested at 0.1C is relatively poor as compared to that of Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ obtained from sol-gel method (SG-material).