Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (4): 568-576.DOI: 10.19894/j.issn.1000-0518.230291

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Synthesis and Properties of Mg‑Doped Ni‑Rich Ternary Cathode Material LiNi0.90Co0.05Mn0.05O2

Sheng CHEN2, Zu-Fei HU2, Hong-Mei CAO3, Zhen-Hua ZHAO1, Yu-Dong ZHANG1()   

  1. 1.School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China
    2.Hunan Jiuri New Materials Co. ,Ltd. ,Huaihua 418200,China
    3.School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China
  • Received:2023-09-23 Accepted:2024-02-02 Published:2024-04-01 Online:2024-04-28
  • Contact: Yu-Dong ZHANG
  • About
  • Supported by:
    Hunan Science and Technology Association “Xiaohe” Science and Technology Talent Lifting Project(2023TJ?X92)


A series of Mg-doped LiNi0.90Co0.05Mn0.05O2 cathode materials are synthesized via a high-temperature solid-phase method. The phase structure, particle morphology, and electrochemical properties of the doped LiNi0.90Co0.05Mn0.05O2 cathode materials are investigated using the X-ray diffraction, scanning electron microscope, transmission electron microscope, and X-ray photoelectron spectroscopy. The test results demonstrate that while Mg doping reduces the reversible capacity of the cathode, it expands the lattice volume, inhibits irreversible phase transitions, improves electrode-electrolyte interface stability, and effectively enhances cycle stability. Among the samples, the LiNi0.90Co0.05Mn0.05O2 cathode material with 3% Mg molar doping amount exhibits a stable structure with less capacity loss and superior overall performance. The discharge specific capacity of the sample at the first cycle reaches 197.3 mA?h/g at 0.1 C in the voltage range of 2.8~4.3 V. Furthermore, it achieves a remarkable cycle retention rate of 93.6% after 100 cycles and maintains a high discharge specific capacity at 5 C (161.1 mA?h/g).

Key words: Lithium-ion batteries, Cathode materials, Element doping, Electrochemical performance

CLC Number: