Effect of mild oxidation of natural graphite (NG7) on anode-electrolyte thermal reactions

C. Menachem, D. Golodnitsky, E. Peled

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of mild oxidation of natural graphite (NG7) and some other parameters on the reaction between a fully lithiated graphite anode (LixC6, x= 1.0-1.1) and 1 M lithium hexafluoroarsenate in ethylene carbonate and diethyl carbonate electrolyte (1:2, v/v) were studied by differential scanning calorimetry (DSC). It was found that mild oxidation of the graphite suppressed the exothermic reaction of the fully lithiated anode with the electrolyte, most probably as a result of the formation of a more stable and chemically bonded solid electrolyte interphase. Separation and removal of the small graphite particles from the anode mixture suppressed this reaction further. It was also found that the copper current collector, the amount of electrolyte and binder as well as other parameters have a significant influence on the heat evolution as measured by DSC.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalJournal of Solid State Electrochemistry
Volume5
Issue number2
DOIs
StatePublished - 2001

Keywords

  • Differential scanning calorimetry
  • Lithiated anode
  • Natural graphite
  • Thermal reactions

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