Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries

Liu, H., Cao, Q., Fu, L. J., Li, C., Wu, Y. P. and Wu, H. Q. (2006) Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries. Electrochemistry Communications, 8 10: 1553-1557. doi:10.1016/j.elecom.2006.07.014


Author Liu, H.
Cao, Q.
Fu, L. J.
Li, C.
Wu, Y. P.
Wu, H. Q.
Title Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries
Formatted title
Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries
Journal name Electrochemistry Communications   Check publisher's open access policy
ISSN 1388-2481
1873-1902
Publication date 2006-10
Sub-type Article (original research)
DOI 10.1016/j.elecom.2006.07.014
Volume 8
Issue 10
Start page 1553
End page 1557
Total pages 5
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Formatted abstract
Alien atom doping has been adopted to modify the electrochemical performance of olivine type LiFePO4 for cathode material of the lithium ion batteries. Here, we first report that zinc-doping can improve the performance of LiFePO4. The effects of zinc-doping have been studied by the measurements of X-ray diffraction pattern, scanning electronic microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The results indicate that the zinc atoms do not destroy the lattice structure of LiFePO4, and enlarge the lattice volume. During de-intercalation and intercalation process of lithium ions, the doped zinc atoms protect the LiFePO4 crystal from shrinking. This kind of "pillar" effect provides larger space for the movement of lithium ions. Consequently, the conductivity is enhanced and the lithium ion diffusion coefficient is boosted after doping. These favourable changes are beneficial to the improvement of the electrochemical performance of LiFePO4 including discharge capacity and rate capability.
© 2006 Elsevier B.V. All rights reserved.
Keyword Doping
Lithium ion battery
LiFePO4
Zn
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Sat, 28 May 2011, 16:42:43 EST by Hao Liu on behalf of Aust Institute for Bioengineering & Nanotechnology