Titanium silicide coated porous silicon nanospheres as anode materials for lithium ion batteries

Young Min Kim, Jihoon Ahn, Seung-Ho Yu, Dong Young Chung, Kyung Jae Lee, Jin Kyu Lee, Yung Eun Sung

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We report on the facile synthesis of porous silicon structure via magnesiothermic reduction followed by coating of the surface with TiSi2. These modifications not only showed significant promise in overcoming the drastic volume change during charge and discharge cycles but also in improving the relatively low conductivity of silicon. The synthesized porous structure with a highly electrically conductive coating layer significantly enhanced the electrochemical performance in terms of cyclic stability and rate capability. The TiSi2 coating layer, which has good electrical conductivity and physical strength, enhances the conductivity and maintains the Si structure during cycling. This combination of porous structure via magnesiothermic reduction and highly conductive TiSi2 coating provides a synergistic effect, which can be seen in the improvements in electrochemical performance. This synthesis demonstrates a promising method for producing high capacity anode materials for next generation LIBs.

Original languageEnglish
Pages (from-to)256-262
Number of pages7
JournalElectrochimica Acta
Volume151
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • anode
  • lithium ion batteries
  • magnesiothermic reduction
  • silicon
  • titanium silicide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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