Abstract
LiNi0.8Co0.1Mn0.1O2 (NCM811), a high nickel-positive electrode material, has higher discharge capacity, lower cost, and less environmental pollution than other systems, so it has attracted many people’s attention. However, its poor thermal stability, cycle rate performance, and safety problems limit its practical application. In this paper, the NCM811 cathode material with Al3+ and PO43− co-doping (NCM-PA) was prepared by co-precipitation method and high-temperature solid-state method to improve its properties. The results show that the co-doping can effectively inhibit the mixing of lithium and nickel, maintain the good lamellar structure of the cathode material, and improve the electrochemical performance of the cathode material. The capacity retention rate of NCM-PA is 14.1% higher than that of the raw material after 100 cycles at 1 C. In addition, due to the small degree of electrode polarization of the co-doping material, NCM-PA still has a discharge-specific capacity of 155.8 mAh/g when the current density is 5 C.
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This work was supported by National Natural Science Foundation of China (Grant No. 414010081).
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Weiyi Zhang carried out the experiments and wrote the manuscript. Weiyi Zhang, Li Xiao, and Zeyu Xiao discussed about the data analysis. Xincun Tang reviewed and edited the manuscript. All authors have read and agreed to the published version of the manuscript.
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Zhang, W., Tang, X., Xiao, L. et al. Influence of Al3+ and PO43− co-doping on structure and electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode materials. J Solid State Electrochem 27, 1185–1194 (2023). https://doi.org/10.1007/s10008-023-05427-8
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DOI: https://doi.org/10.1007/s10008-023-05427-8