Nanocomposites derived from phenol-functionalίzed Si nanoparticles for high performance lithium ion battery anodes

Jeong Kyu Lee, Mayfair C. Kung, Lynn Trahey, Michael N. Missaghi, Harold H. Kung

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Si-C nanocomposites were prepared by carbonizing Si particles covalently bonded to resorcnol-formaldehyde (RF) gel by hydrosilylation, for high performance lithium ion battery anodes. The prepared 700°C RF gel measured in N 2 show a weight loss between 700 to 1000°C, which is consistent with further dehydrogenation of the sample. The irreversible capacity loss is associated with the formation of the solid electrolyte interface (SEI) layer due to the reaction of Li + with the electrolyte and surface SiO. The reversible charge capacity of Si particles is found to be 630 mA h/g at C/6, which is found to decrease with increasing rates to 300 mA h/g at 1.7C. The nanoparticle samples prepared with phenolated particles show high reversible capabilities with appreciable cycling stability, illustrating the beneficial effect of their preparation method.

Original languageEnglish
Pages (from-to)6-8
Number of pages3
JournalChemistry of Materials
Volume21
Issue number1
DOIs
Publication statusPublished - Jan 13 2009

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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