High capacity and rate capability of core-shell structured nano-Si/C anode for Li-ion batteries

Yoon Hwa, Won Sik Kim, Seong Hyeon Hong, Hun Joon Sohn

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

Core-shell structured nano-Si/C (n-Si/C) anode material for Li ion batteries was prepared by substrate induced coagulation (SIC) method with nano-Si (n-Si) as core component and amorphous carbon as shell. The electronic conducting amorphous carbon shell of 5-10nm thickness which connected each n-Si particle like frog spawn shape not only buffered volume expansion of Si particles during the cycling but also acted as an electrical conducting pathway. This n-Si/C core-shell structured electrode showed a highly reversible capacity c.a. 1800mAhg-1 over 50 cycles, superior rate capability and good cycle retention.

Original languageEnglish (US)
Pages (from-to)201-205
Number of pages5
JournalElectrochimica Acta
Volume71
DOIs
StatePublished - Jun 1 2012
Externally publishedYes

Keywords

  • Anode materials
  • Core-shell structure
  • Lithium batteries
  • Silicon

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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