Electrochemical characteristics of silver- And nickel-coated synthetic graphite prepared by a gas suspension spray coating method for the anode of lithium secondary batteries

Won Chang Choi, Dongjin Byun, Joong Kee Lee, Byung Won Cho

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Four kinds of synthetic graphite coated with silver and nickel for the anodes of lithium secondary batteries were prepared by a gas suspension spray coating method. The electrode coated with silver showed higher charge-discharge capacities due to a Ag-Li alloy, but rate capability decreased at higher charge-discharge rate. This result can be explained by the formation of an artificial Ag oxidation film with higher impedance, this lowered the rate capability at high charge-discharge rate due to its low electrical conductivity. Rate capability is improved, however, by coating nickel and silver together on the surface of synthetic graphite. The nickel which is inactive with oxidation reaction plays an important role as a conducting agent which enhanced the conductivity of the electrode.

Original languageEnglish
Pages (from-to)523-529
Number of pages7
JournalElectrochimica Acta
Volume50
Issue number2-3 SPEC. ISS.
DOIs
Publication statusPublished - 2004 Nov 30

Keywords

  • Gas suspension spray coating
  • Lithium secondary batteries
  • Nickel
  • Silver
  • Synthetic graphite (MCMB)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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