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

研究成果: Article査読

49 被引用数 (Scopus)


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.

ジャーナルSolid State Ionics
出版ステータスPublished - 2009 5 14

ASJC Scopus subject areas

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

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