Use of Zirconium Dual-Modification on the LiNi0.8Co0.1Mn0.1O2 Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries

A ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode is successfully fabricated, and its electrochemical performances are evaluated. The 0.5 wt % ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode exhibits excellent electrochemical performances compared to the pristine LiNi0.8Co0.1Mn0.1O2. The 0.5 wt % ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode shows a high discharge capacity of 220.9 mA h g–1. Moreover, it maintains a capacity retention of 76.1% after 60 cycles. Most importantly, it has extraordinary retention capacities of 76.7 and 59.1% at 4.0 and 6.0 C, respectively. This is because ZrO2 coating and Zr doping contribute to rapid Li+ conductivity and good structural stability. Thus, the LiNi0.8Co0.1Mn0.1O2 cathode with a suitable amount of ZrO2 coating and Zr doping is considered a good candidate for state-of-the-art Li-ion batteries.