Use of Zirconium Dual-Modification on the LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries
Sung-Joo Jo, Do‐Young Hwang, Seung-Hwan Lee
Abstract
A ZrO 2 -coated and Zr-doped LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode is successfully fabricated, and its electrochemical performances are evaluated. The 0.5 wt % ZrO 2 -coated and Zr-doped LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode exhibits excellent electrochemical performances compared to the pristine LiNi 0.8 Co 0.1 Mn 0.1 O 2 . The 0.5 wt % ZrO 2 -coated and Zr-doped LiNi 0.8 Co 0.1 Mn 0.1 O 2 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 ZrO 2 coating and Zr doping contribute to rapid Li + conductivity and good structural stability. Thus, the LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode with a suitable amount of ZrO 2 coating and Zr doping is considered a good candidate for state-of-the-art Li-ion batteries.