Surface modification of LiNi0.5Mn1.5O4 by ZrP2O7 and ZrO2 for lithium-ion batteries

H. M. Wu, I. Belharouak, Ali Abouimrane, Y. K. Sun, K. Amine

Research output: Contribution to journalArticle

195 Citations (Scopus)

Abstract

The spinel LiNi0.5Mn1.5O4 has been surface modified separately with 1.0 wt.% ZrO2 and ZrP2O7 for the purpose of improving its cycle performance as a cathode in a 5-V lithium-ion cell. Although the modifications did not change the crystallographic structure of the surface-modified samples, they exhibited better cyclability at elevated temperature (55 °C) compared with pristine LiNi0.5Mn1.5O4. The material that was surface modified with ZrO2 gave the best cycling performance, only 4% loss of capacity after 150 cycles at 55 °C. Electrochemical impedance spectroscopy demonstrated that the improved performance of the ZrO2-surface-modified LiNi0.5Mn1.5O4 is due to a small decrease in the charge transfer resistance, indicating limited surface reactivity during cycling. Differential scanning calorimetry showed that the ZrO2-modified LiNi0.5Mn1.5O4 exhibits lower heat generation and higher onset reaction temperature compared to the pristine material. The excellent cycling and safety performance of the ZrO2-modified LiNi0.5Mn1.5O4 electrode was found to be due to the protective effect of homogeneous ZrO2 nano-particles that form on the LiNi0.5Mn1.5O4, as shown by transmission electron microscopy.

Original languageEnglish
Pages (from-to)2909-2913
Number of pages5
JournalJournal of Power Sources
Volume195
Issue number9
DOIs
Publication statusPublished - 1 May 2010
Externally publishedYes

Fingerprint

Surface treatment
electric batteries
lithium
cycles
ions
heat generation
Heat generation
Electrochemical impedance spectroscopy
Lithium
spinel
Charge transfer
Differential scanning calorimetry
safety
Cathodes
heat measurement
reactivity
cathodes
charge transfer
Lithium-ion batteries
impedance

Keywords

  • LiNiMnO
  • Lithium-ion batteries
  • ZrO coating
  • ZrPO coating

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Surface modification of LiNi0.5Mn1.5O4 by ZrP2O7 and ZrO2 for lithium-ion batteries. / Wu, H. M.; Belharouak, I.; Abouimrane, Ali; Sun, Y. K.; Amine, K.

In: Journal of Power Sources, Vol. 195, No. 9, 01.05.2010, p. 2909-2913.

Research output: Contribution to journalArticle

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