Remarkable performance improvement of inexpensive ball-milled Si nanoparticles by carbon-coating for Li-ion batteries

Takatoshi Kasukabe, Hirotomo Nishihara, Shinichiroh Iwamura, Takashi Kyotani

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Si nanoparticles prepared by ball-milling (BM-Si) are expected as practical negative-electrode materials for lithium-ion batteries, but their performance is much lower than those of more expensive Si nanomaterials, such as chemical-vapor-deposition derived Si nanoparticles (CVD-Si) having a tight network structure. It is found that carbon-coating of aggregations of BM-Si forms a quasi-network structure, thereby making the performance comparable to that of CVD-Si under capacity restriction (to 1500 mAh g-1). In this case, the structural transition of BM-Si during charge/discharge cycling is characterized by the formation of a specific 'wrinkled structure', which is very similar to that formed in CVD-Si.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalJournal of Power Sources
Volume319
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • LIBs
  • Si anodes
  • Si/C composites
  • Structure change
  • Transmission electron microscopy

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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