Synthesis and characterization of Li1.05Co1/3Ni1/3Mn1/3O1.95X0.05 (X = Cl,Br) cathode materials for lithium-ion battery |
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| Authors: | Yuhong Chen Qishuai Jiao Liang Wang Yawei Hu Na Sun Yushuang Shen Yuhua Wang |
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| Institution: | 1. Department of Chemical and Environmental Engineering, Hebei Chemical and Pharmaceutical Vocational Technology College, Fangxing street, Hebei Shijiazhuang 050026, China;2. Library of Hebei University of Science and technology, Hebei Shijiazhuang 050018, China;3. School of materials science and Engineering, Shijiazhuang Tiedao University, Hebei Shijiazhuang 050043, China |
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| Abstract: | In order to improve the thermal stability and dynamic performance of LiCo1/3Ni1/3Mn1/3O2 materials, Cl-doped and Br-doped materials were synthesized via the co-precipitation method. The morphology, structure, electrochemical performance and thermal stability were characterized by environment scanning electron microscopy (ESEM), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), charge–discharge cycling and differential scanning calorimetry (DSC). Results show that all materials had a stable layered structure with α-NaFeO2 and that Cl-doping slightly increased the size of grains. Both Cl-doping and Br-doping improved the high rate of discharge capacity, cycle-life performance and thermal stability, but Cl-doping was better than Br-doping in improving the material structure stability, dynamic performance and thermal stability. |
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