Electrochemical characteristics of graphite coated with tin-oxide and copper by fluidised-bed chemical vapour deposition

Joong Kee Lee, D. H. Ryu, Jeh Beck Ju, Y. G. Shul, B. W. Cho, D. Park

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Anodes for a lithium secondary battery are prepared with synthetic graphite (meso-phase carbonaceous microbead: MCMB) which is coated with tin-oxide and copper by fluidised-bed chemical vapour deposition (FCVD). In the present study, three different samples was prepared, and their electrochemical characteristics are examined by using X-ray diffraction, electrochemical voltage spectroscopy (EVS), scanning electron micrography, ac impedance measurements, and galvanostatic charge-discharge experiments. The electrode coated with tin-oxide gives higher capacity than uncoated MCMB, but the capacity decreases with cycling. This is probably due to severe volume changes. The cycleability is improved, however, by coating copper on the surface of the carbonaceous material coated with tin-oxide. The copper plays an important role as an inactive matrix which provides a buffer against volume changes.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalJournal of Power Sources
Volume107
Issue number1
DOIs
Publication statusPublished - 2002 Apr 20

All Science Journal Classification (ASJC) codes

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

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