In this paper, well-crystallized Zr-doped Ni-rich layered LiNi_0.91Co_0.06Mn_0.03O₂ cathode is prepared by solid state method and its structural properties and electrochemical performances in lithium-ion cells is investigated. The Zr-doped LiNi_0.91Co_0.06Mn_0.03O₂ has superior cation ordering and the morphology of Zr-doped LiNi_0.91Co_0.06Mn_0.03O₂ was the same as pristine LiNi_0.91Co_0.06Mn_0.03O₂. The 0.5 wt% Zr-doped LiNi_0.91Co_0.06Mn_0.03O₂ shows better electrochemical performances such as initial discharge capacity of 210.5 mAh g^-1, rate capability of 75.4 % at 2 C and cycling retention of 94.5 % after 50 cycles. It can be elucidated by the role of the Li₂ZrO₃ layer and Zr substitution in LiNi_0.91Co_0.06Mn_0.03O_2.

Keywords: Zr-doped Ni-rich layered LiNi_0.91Co_0.06Mn_0.03O₂, Cation ordering, Morphology, Electrochemical performances