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Enhancing the cycling stability of Co-free high-Ni layered cathodes through MgO surface engineering
Zi-Ting Zhou1, Rui-Jie Luo1, Chong-Yu Du1
1Department of Materials Science, Fudan University, Shanghai 200433, PR China. ynzhou@fudan.edu.cn.
Abstract:
A magnesium oxide (MgO) coating strategy is proposed for improving the cobalt-free high-nickel LiNi0.9Mn0.1O2 cathode. It is revealed that a MgO coating can stabilize reversible Ni3+/Ni4+ redox and suppress structural degradation. The MgO coated LiNi0.9Mn0.1O2 exhibits a promising capacity retention of 66.67% after 1000 cycles at 1C rate in a wide voltage range of 2.8-4.4 V.
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