Electrochemical behaviors of diamond-like-carbon-coated silicon monoxide-graphite composite anode for Li-ion battery

Jun Kyu Lee, Wooyoung Yoon, Bok Ki Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effects of a diamond-like carbon (DLC) coating on a silicon monoxide-graphite composite electrode are studied in order to improve the electrochemical characteristics of silicon monoxide anodes. The DLC is applied through plasma-enhanced chemical vapor deposition and identified by high-resolution transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. DLC-coated siliconmonoxide- graphite composite anode/LiCoO2 full-cells (CR2032) are then assembled in an argon-filled glove-box. The discharge capacity of the coated cell is 523 mA h g-1 at the first cycle and 409 mA h g-1 at the 100th cycle at a 0.5 C rate. The 100-cycle capacity retention is 78.2%, which is greater than that of the bare cell (52%). The improved electrochemical characteristics of theDLC-coated cell are determined through impedance, energy-dispersive X-ray, and scanning electron microscopy analyzes. Because the DLC has a high Young's modulus and chemical stability, the coated silicon monoxide- graphite composite maintains a high capacity during cycling.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume160
Issue number9
DOIs
Publication statusPublished - 2013 Aug 20

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Diamond
Graphite
electric batteries
Diamonds
Anodes
anodes
Carbon
graphite
diamonds
Silicon
cycles
composite materials
carbon
Composite materials
silicon
cells
ions
gloves
Argon
Chemical stability

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Electrochemical behaviors of diamond-like-carbon-coated silicon monoxide-graphite composite anode for Li-ion battery. / Lee, Jun Kyu; Yoon, Wooyoung; Kim, Bok Ki.

In: Journal of the Electrochemical Society, Vol. 160, No. 9, 20.08.2013.

Research output: Contribution to journalArticle

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