Modified SiO as a high performance anode for Li-ion batteries

Yoon Hwa, Cheol Min Park, Hun Joon Sohn

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

An anode material with improved electrochemical performances for Li-ion batteries is prepared using the disproportionation reaction of SiO followed by a high energy mechanical milling process. The modified SiO is composed of embedded Si nano-crystallites in a Si-oxide matrix. Si-oxide matrix could be divided into two parts by reactivity with Li-ion. The inactive Si-suboxide matrix would buffer the volume expansion of embedded Si nano-crystallites and active amorphous SiO2 during the lithiation. This modified SiO electrode shows a large reversible capacity, close to 1000 mAh g-1, and good cyclability, over 50 cycles.

Original languageEnglish (US)
Pages (from-to)129-134
Number of pages6
JournalJournal of Power Sources
Volume222
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Anode
  • Disproportionation reaction
  • Lithium ion battery
  • Silicon monoxide

ASJC Scopus subject areas

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

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