LAUSR

Ni-rich cathode materials with core-shell structure are promising candidate materials for lithium-ion batteries, since they have excellent electrochemical properties. In this article, LiNi0.8Co0.15Mn0.05O2 was synthesized using Mn3O4-coated Ni0.842Co0.158(OH)2 as the precursor. SEM and EPMA results indicated that LiNi0.8Co0.15Mn0.05O2 possessed a perfect core-shell structure. The perfect core-shell structure originates from that Ni0.842Co0.158(OH)2 is uniformly coated by flocculent Mn3O4 particles. Galvanostatic charge/discharge measurements showed that the reversible capacities of the as-prepared LiNi0.8Co0.15Mn0.05O2 are 199, 178, and 143 mAh/g at 0.1, 1.0, and 5.0 °C, respectively. Meanwhile, compared to LiNi0.8Co0.15Mn0.05O2 prepared using Mn(OH)2-coated Ni0.842Co0.158(OH)2 as the precursor, the as-prepared material demonstrated a highly enhanced capacity retention of 96% after 200 cycles and 77.5% after 750 cycles, as well as enhanced start temperature of thermal runaway.