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Ionics

, Volume 25, Issue 7, pp 3009–3020 | Cite as

Effect of Cu2+ on Li [Li0.2Ni0.2Co0.08Mn0.52]O2 at different stages

  • Hui Liu
  • Enshan HanEmail author
  • Ling Li
  • Lingzhi Zhu
  • Lina Li
  • Chenglei Zhang
  • Lijun Dou
Original Paper
  • 71 Downloads

Abstract

Cathode material Li [Li0.2Ni0.2Co0.08Mn0.52−xCux]O2 (x = 0, 0.01, 0.03, 0.05, 0.07) has been synthesized via carbonate coprecipitation method and modified by Cu2+ which was introduced at different stages. The crystal structure features, morphology, and electrochemical properties of the powders are studied in detail using X-ray diffraction spectroscopy, scanning electron microscopy, EDS spectroscopy, and electrochemical measurements. The experimental results show that the electrochemical properties of Li [Li0.2Ni0.2Co0.08Mn0.52−xCux]O2 (x = 0, 0.01, 0.03, 0.05, 0.07) oxides are improved. This is because an appropriate amount of Cu2+ doping increases the lattice spacing of the layered material, reduces the agglomeration of the particles, and improves the uniformity of the particles. Especially in the coprecipitation stage, Cu2+ was introduced and x = 3% showed better rate and cycle performance. The specific discharge capacity at 1C and 2C was 197.28 mAhg−1 and 124.92 mAhg−1, respectively, and cycle returned to 0.1C capacity after 45 cycles, the discharge specific capacity is still up to 261.5 mAhg−1.

Keywords

Lithium-ion battery Carbonate coprecipitation method Lithium-rich cathode material Cu2+ doping Electrochemical performance 

Notes

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Hui Liu
    • 1
  • Enshan Han
    • 1
    Email author
  • Ling Li
    • 1
  • Lingzhi Zhu
    • 1
  • Lina Li
    • 1
  • Chenglei Zhang
    • 1
  • Lijun Dou
    • 1
  1. 1.School of Chemical Engineering and TechnologyHebei University of TechnologyTianjinPeople’s Republic of China

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