Synthesis and characterization of LiCoO 2-coated LiNi 0.8Co 0.15Al 0.05O 2 cathode materials

Wanmin Liu, Guorong Hu, Ke Du, Zhongdong Peng, Yanbing Cao, Qiang Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)

Abstract

An electrochemically active LiCoO 2 layer was coated onto the surface of LiNi 0.8Co 0.15Al 0.05O 2 by a molten salt method. The 3.0 wt.% LiCoO 2-coated LiNi 0.8Co 0.15Al 0.05O 2 exhibited excellent electrochemical performance, with an initial discharge capacity of 196.2 mAh·g - 1 and capacity retention of 98.7% after 50 cycles when cycled at 0.2 C rate between 2.8 and 4.3 V. Moreover, the cycle performance and rate capability of the coated sample were better than that of the bare one. Electrochemical impedance spectroscopy measurements showed that the decrease of NiO-type surface layer on the coated sample is the major reason for the improvement of electrochemical performance of LiCoO 2-coated LiNi 0.8Co 0.15Al 0.05O 2 cathode.

Original languageEnglish
Pages (from-to)11-13
Number of pages3
JournalMaterials Letters
Volume83
DOIs
Publication statusPublished - 15 Sep 2012
Externally publishedYes

Keywords

  • Composite materials
  • Functional
  • Molten salt method
  • Nickel-rich lithium cobalt oxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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