Zirconium doped LiNi0.91Co0.06Mn0.03O2cathode as a superior cathode for lithium ion batteries

In this paper, well-crystallized Zr-doped Ni-rich layered LiNi0.91Co0.06Mn0.03O2 cathode is prepared by solid state method and its structural properties and electrochemical performances in lithium-ion cells is investigated. The Zr-doped LiNi0.91Co0.06Mn0.03O2 has superior cation ordering and the morphology of Zr-doped LiNi0.91Co0.06Mn0.03O2 was the same as pristine LiNi0.91Co0.06Mn0.03O2. The 0.5 wt% Zr-doped LiNi0.91Co0.06Mn0.03O2 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 LiNi0.91Co0.06Mn0.03O2.