, Volume 25, Issue 7, pp 2977–2985 | Cite as

Enhanced electrochemical performance of LiMn2O4 by SiO2 modifying via electrostatic attraction forces method

  • Jia Guo
  • Yongxiang Chen
  • Chunrui Xu
  • Yunjiao LiEmail author
  • Shiyi Deng
  • Hu Xu
  • Qianye Su
Original Paper


SiO2-modified LiMn2O4 materials were synthesized by the electrostatic attraction forces with the followed heat treatment. The surface morphology, structure, and electrochemical performance were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), CV, and electrochemical impedance spectroscopies (EIS), respectively. SEM and XRD patterns revealed that SiO2 was not only coated on the surface, but also partial Si4+ ions diffused into the crystal structure. As a result, the spinel LiMn2O4 modified with 2.0 wt.% SiO2 (LiMn2O4@SiO2-2.0 wt.%) exhibits a discharge specific capacity of 101.2 mAh g−1 over 3.0–4.3 V and with a capacity retention of 97.6% after 100 cycles at 25 °C. Even cycled at 55 °C, its capacity retention is still 88.7%. The excellent electrochemical performance is attributed to the improved reversibility and dynamic behaviors after SiO2 modification. Partial Si4+ doping in LiMn2O4 assists to stabilize its crystal structure, while the SiO2 coating layer on the surface of LiMn2O4 materials helps to reduce the attacks of electrolyte and the dissolution of Mn2+.


Lithium ion batteries SiO2-coated Electrostatic attraction forces Spinel lithium manganese oxides Cathode material 


Funding information

This work was supported by the National Natural Science Foundation of China (No. 50174058) and the kind support from the Government of Guangxi Zhuang Autonomous Region (Glorious Laurel Scholar Program, 2011).


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Copyright information

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

Authors and Affiliations

  • Jia Guo
    • 1
  • Yongxiang Chen
    • 1
  • Chunrui Xu
    • 1
  • Yunjiao Li
    • 1
    Email author
  • Shiyi Deng
    • 1
  • Hu Xu
    • 1
  • Qianye Su
    • 1
  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangshaPeople’s Republic of China

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