Study on Electrochemical Performance of Various Oxides-Coated LiNi0.5Mn1.5O4 Cathode for Lithium Ion Battery

  • Seonggyu Cho
  • Shinho Kim
  • Wonho Kim
  • Seok KimEmail author
Original Article - Nanomaterials


In this study, LiNi0.5Mn1.5O4 was prepared by solid-state synthesis method and MgCO3, Al2O3, SiO2, TiO2 were dry-coated on the surface of LiNi0.5Mn1.5O4. The structure and geometry of pure-LNMO and coated-LNMO were characterized by XRD, SEM, SEM–EDS. Dry coating method was applied and various coating materials were evaluated in terms of the stability study at room/high temperature and electrochemical property. The results of XRD and SEM–EDS demonstrated that MgCO3, Al2O3, SiO2, TiO2 were coated on the LiNi0.5Mn1.5O4 surface without any structural changes. Compared with pure-LNMO, the coated-LNMO shows significant decrease in side-reaction with electrolyte solution at the first cycle of the electrochemical test. In addition, coated-LNMO displays prominent thermal-stability at 25 °C and 55 °C and high c-rate, compared with pure-LNMO. Especially the coating layer of SiO2 inhibits the side-reaction with electrolyte solution induced by initial moisture formation. Therefore, the stability of capacity is significantly improved at the temperature of 55 °C and high c-rate, which are same results with those obtained by the electrochemical impedance spectroscopy results. This study has employed solid-state synthesis and dry coating method for the evaluation of various coated-LNMO materials and demonstrated the possibility to develop new high energy density electrode materials by surface modification.

Graphical Abstract


LiNi0.5Mn1.5O4 Cathode Lithium-ion batteries Solid state synthesis Dry coating method 



This research was supported by National University Promotion Program through the Pusan National University of Korea.


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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  • Seonggyu Cho
    • 1
    • 2
  • Shinho Kim
    • 1
  • Wonho Kim
    • 2
  • Seok Kim
    • 2
    Email author
  1. 1.Secondary Battery R&D Center, DRB Holdings Co.BusanRepublic of Korea
  2. 2.Department of Chemical and Biochemical EngineeringPusan National UniversityBusanRepublic of Korea

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