Formation and characterization of Cu-Si nanocomposite electrodes for rechargeable Li batteries

Hyo Jin Ahn, Youn Su Kim, Won Bae Kim, Yung Eun Sung, Tae Yeon Seong

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have investigated the structural and electrochemical properties of Cu-Si nanocomposite electrode fabricated by co-sputtering method. Reversible capacity of an amorphous Si electrode is degraded continuously with increasing cycle number up to 40 cycles. However, a Cu-Si nanocomposite electrode, where Cu nano-dots are embedded in an amorphous Si matrix, shows an excellent reversible capacity with a stable value of ca. 400 μA h cm-2 μm-1 up to 40 cycles. The improved reversible capacity of the Cu-Si nanocomposite electrodes is attributed to the enhanced structural stability of the electrodes due to the presence of the Cu nano-dots evenly distributed throughout the Si matrix.

Original languageEnglish
Pages (from-to)211-214
Number of pages4
JournalJournal of Power Sources
Volume163
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Dec 7

Keywords

  • Capacity
  • Co-sputtering
  • Cu-Si
  • Cycling performance
  • Li batteries
  • Nanocomposite

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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