Size effect on electrochemical property of nanocrystalline LiCoO2 synthesized from rapid thermal annealing method

M. Okubo, E. Hosono, T. Kudo, H. S. Zhou, I. Honma

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Nano-sizing of cathode materials for higher power Li-ion rechargeable batteries is an effective method to shorten a Li-ion diffusion path and achieve fast charge transfer. Nanocrystalline LiCoO2 was synthesized through a combination of rapid thermal annealing method and a sol-gel method assisted with a triblock copolymer surfactant, and the electrochemical properties including the Li-ion chemical diffusion coefficient was investigated. Li-ion deintercalation/intercalation experiments suggested an extreme small amount of cation mixing between Li+ and Co3+ within a layered structure of LiCoO2, which was not observable in the Raman spectroscopy. The analysis based on the solution for the diffusion equation of the cylinder model revealed that the cation mixing strongly decelerates the Li-ion diffusion in LiCoO2.

Original languageEnglish
Pages (from-to)612-615
Number of pages4
JournalSolid State Ionics
Volume180
Issue number6-8
DOIs
Publication statusPublished - 2009 May 14
Externally publishedYes

Keywords

  • Cathode
  • LiCoO
  • Lithium-ion rechargeable battery
  • Nanoparticle

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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