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Improving electrochemical performance of LiMnPO4 by Zn doping using a facile solid state method

Authors
  • Wang, Yourong1
  • Chen, Yafang1
  • Cheng, Siqing1
  • He, Liangnian1
  • 1 Wuhan Polytechnic University, Chemical and Environmental Engineering Department, Wuhan, 430023, Hubei, P. R. China , Wuhan (China)
Type
Published Article
Journal
Korean Journal of Chemical Engineering
Publisher
Springer-Verlag
Publication Date
Mar 01, 2011
Volume
28
Issue
3
Pages
964–968
Identifiers
DOI: 10.1007/s11814-010-0459-1
Source
Springer Nature
Keywords
License
Yellow

Abstract

Olivine structure LiMnPO4/C as cathode materials for Li-ion batteries were synthesized via a simple solidstate reaction. Improvement of the electrochemical performance of LiMnPO4/C cathode material was realized significantly by the method of doping Zn. The obtained LiMn0.95Zn0.05PO4/C electrode material was studied by the measurements of X-ray diffraction pattern, scanning electronic microscopy, electrochemical impedance spectroscopy and electrochemical performance. The results indicate that the LiMn0.95Zn0.05PO4/C materials exhibit discharge specific capacity of 140.2 mA h g−1 at 0.02 C rate and better rate capability. These excellent results are elucidated by EIS test, which showed that there was the decrease of charge transfer resistance and faster lithium-ion diffusion in LiMnPO4/C cathode materials after Zn doping.

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