Comparative studies on ZnO-coated and uncoated LiCoO2 cycled at various rates and temperatures

Seok Min Moon, Wonyoung Chang, Dongjin Byun, Joong Kee Lee

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Abstract

Modification by surface coating of cathode materials is one of the preferred methods to achieve improved electrochemical performance, especially at a high-charge cut-off voltage. In this study, ZnO-coated LiCoO2 powders were prepared by plasma-enhanced chemical vapor deposition (PE-CVD). In our previous work [1], the roles of ZnO coating in the capacity retention of LiCoO2 during high-voltage cycling in the range of 3.0 V-4.5 V and the thermal stability of the charged LiCoO2 electrode were investigated as a function of the coating amount. This study confirms the positive effect of ZnO coating on cyclic performances of LiCoO2, in particular at various C-rates and operating temperatures. In addition, the structural stability of the LiCoO2 materials coated with different amount of ZnO during cycling was investigated using cyclic voltammetry.

Original languageEnglish
Pages (from-to)e122-e126
JournalCurrent Applied Physics
Volume10
Issue number4 SUPPL.
DOIs
Publication statusPublished - 2010 Nov 1

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Keywords

  • Cathode materials
  • Lithium-ion batteries
  • Plasma-enhanced chemical vapor deposition
  • Structural stability
  • Zinc oxide coating

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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