Copper-coated amorphous silicon particles as an anode material for lithium-ion batteries

Sankaran Murugesan, Justin T. Harris, Brian A. Korgel, Keith J. Stevenson

Research output: Contribution to journalArticlepeer-review

131 Citations (Scopus)


Colloidally grown hydrogenated amorphous silicon (a-Si:H) particles offer promise as anodes for lithium ion batteries with a much higher energy density than graphite. We have found that significantly improved battery cycle performance and enhanced lithium storage capacity (by a factor of 7) is achieved by depositing copper (Cu) on the a- Si:H particles using a polyol reduction method. The superior performance appears to result from an electronically conducting network formed by the Cu coating. Highresolution interfacial spectroelectrochemical studies with in situ Raman spectroscopy illustrates the role of Cu coating over a-Si:H particles and provides insight into improving low Coulombic efficiency and capacity fading on cycling of Si-based anodes in Li-ion batteries.

Original languageEnglish
Pages (from-to)1306-1315
Number of pages10
JournalChemistry of Materials
Issue number7
Publication statusPublished - 2012
Externally publishedYes


  • A-Si:H particles
  • Cu coating
  • In situ Raman spectroscopy
  • Lithiation/delithiation
  • Polyol reduction


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