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Ionics

, Volume 23, Issue 11, pp 3013–3022 | Cite as

Preparation and characterization of LiNi0.495M0.01Mn0.495O2 (M = Zn, Co, and Y) for lithium ion batteries

  • P. Senthil Kumar
  • A. Sakunthala
  • M. V. Reddy
  • B. V. R. Chowdari
Original Paper

Abstract

Layered structured LiNi0.5Mn0.5O2 and LiNi0.495M0.01Mn0.495O2 (M = Zn, Co, and Y) compounds were prepared by PVP (poly(vinyl pyrrolidone))-assisted sol-gel method, and their structural, morphological, vibrational, transport, and electrochemical properties were characterized by XRD, SEM, FTIR, Raman, AC impedance, and galvanostatic charge and discharge analysis. XRD patterns reveal that doping does not change the crystal structure of the LiNi0.5Mn0.5O2 compound. SEM images show that the average size of the particle is in sub-micron ranges. The AC impedance studies shows an electrical conductivity of ∼2.5 × 10−7 S/cm for the parent compound. The introduction of Zn/Co/Y at equivalent sites increased the electrical conductivity by one order ∼10−6 S/cm. The compound LiNi0.495Co0.01Mn0.495O2 shows the highest electrical conductivity of 2.85 × 10−6 S/cm and delivers a specific discharge capacity of 110 mAh/g at the end of the 25th cycle in the voltage window of 2.5–4.4 V for a current density of 30 mA/g.

Keywords

Li-ion battery LiNi0.5Mn0.5O2 Dopant AC impedance Cation disorder 

Notes

Acknowledgement

The authors would like to thank Karunya University, Coimbatore- 641114, Tamilnadu, India for the central research facilities. The authors are very much grateful to the Department of Atomic Energy, Board of Research in Nuclear Sciences, Mumbai (DAE-BRNS Project No. 34/32/1221/2012) for providing funding for this research work. One of the authors, Mr. P. Senthil Kumar, thanks DAE-BRNS (Project No. 34/32/1221/2012), for the grant of Senior Research Fellowship. The authors are also thankful to the Department of Science and Technology (DST), India (Project No. SR/FTP/PS-192/2011) for the financial support and SK thanks NUS IRI for providing research opportunities at NUS.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • P. Senthil Kumar
    • 1
  • A. Sakunthala
    • 1
  • M. V. Reddy
    • 2
  • B. V. R. Chowdari
    • 2
  1. 1.Department of PhysicsKarunya UniversityCoimbatoreIndia
  2. 2.Department of PhysicsNational University of SingaporeSingaporeSingapore

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