Abstract
In the present study, a novel layered cathodic compound, Li1-xNi0.58Co0.12Mn0.19Fe0.07Cr0.04MgxO2, was synthesized using an economically feasible oxalic acid co-precipitation method. The microstructure, morphology, and electrochemical properties of the synthesized compounds were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), charge–discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Electrochemical test results showed that the sample containing Cr = 0.04 and Mg = 0.02 exhibited the best electrochemical performance with an initial specific capacity of 181.76 mAh·g−1 at 0.1 C, the capacity retention ratios of 88.81% at 200 cycles at 0.5 C. In addition, the 4Cr-2 Mg electrode exhibits superior rate capability with discharge capacities of 182.56, 171.13, 158.51, 133.41, and 121.01 mAh·g−1 at 0.1, 0.2, 0.5, 1, and 2 C, respectively. Replacing Cr can play an essential role in improving maintenance capacity and cycling behavior. Additionally, the diffusibility of lithium-ion batteries (LIBs) was significantly improved as a result of Mg doping, which could be related to the reduction in Li+/Ni2+ cation mixing and its ionic radius.
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This work was supported by the Science and Technology Plan Foundation of Foshan (1920001001421) and the industry-University-Research cooperation project of Zhuhai (2220004002572).
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QL (first author): conceptualization, methodology, experiment, formal analysis, and writing—original draft; JH: data curation and formal analysis; HW: validation; MZ: resource; ZT: investigation; JW: visualization; JL (corresponding author): conceptualization, funding acquisition, resources, supervision, and writing—review and editing. All authors reviewed the manuscript.
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Luo, Q., He, J., Wu, H. et al. Influence of Cr and Mg co-doping on electrochemical performance of quaternary cathode materials for lithium-ion battery. Ionics 30, 1935–1946 (2024). https://doi.org/10.1007/s11581-024-05393-9
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DOI: https://doi.org/10.1007/s11581-024-05393-9