Al-Zr dual-doping enhancing the electrochemical performance of spinel LiMn2O4 cathodes
Wei Wu(吴伟)1, Yuhui Cui(崔煜辉)2, Yuxin Zheng(郑雨欣)1, Fei Huang(黄飞)1, Hong Li(李泓)1,2, and Liang Yin(尹良)1,2,†
1 Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd., Liyang 213300, China; 2 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract LiMnO (LMO) represents one of the most prevalent cathode materials utilized in lithium-ion batteries (LIBs), yet its broader application is often hampered by its limited achievable capacity and significant capacity degradation during cycling. In this work, a novel dual-doping strategy involving Al and Zr ions has been employed to refine the atomic structure of LMO's spinel framework. The resultant dual-doped material, LiMnZrAlO, exhibits enhanced electrochemical properties, boasting a discharge capacity of 124.9 mAh/g at a rate of 0.1 C. Furthermore, the formation of stronger Al-O and Zr-O bonds contributes to the stabilization of the delithiated LMO structure. Impressively, 97.7% of its initial capacity is retained after 100 cycles at a 5 C rate. Additionally, enhancements in rate performance and high-temperature cycling stability have also been observed. This study underscores the potential of Al and Zr dual-doping as a promising approach to enhance LMO cathodes, providing a scalable and efficient means of improving the performance of lithium manganese oxide cathode materials through the incorporation of multiple ions.
Wei Wu(吴伟), Yuhui Cui(崔煜辉), Yuxin Zheng(郑雨欣), Fei Huang(黄飞), Hong Li(李泓), and Liang Yin(尹良) Al-Zr dual-doping enhancing the electrochemical performance of spinel LiMn2O4 cathodes 2025 Chin. Phys. B 34 068201
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