Electrochemical characteristics of pyrolytic carbon coated silicon for anode materials of lithium ion batteries

Jung Sub Kim, Dong Jin Byun, Haw Young Lee, Joong Kee Lee

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Abstract

Pyrolytic carbon coated silicon is prepared and employ it as an anode material for lithium secondary batteries. The pyrolytic carbon coating of silicon with sucrose precursor not only provides a suitable carbon matrix but also suppresses the breaking away of Si from the current collector during the insertion and extraction of Li+. The increase of disordered carbon content leads to the increase of discharge capacity retention. The improvements of cycle stability are attributed to a decrease in the volume change of the silicon, good networking between Si particles, and good adhesion of the current collector with the active material. The nano Si combined with the disordered carbon leads to an increase of capacity retention and initial coulombic efficiency.

Original languageEnglish
Pages (from-to)7087-7091
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume15
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

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Keywords

  • Anode
  • Carbon
  • Composite
  • Electrochemistry
  • Silicon

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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