Bundle-type silicon nanorod anodes produced by electroless etching using silver ions and their electrochemical characteristics in lithium ion cells

Jung Sub Kim, Hun Gi Jung, Wonchang Choi, Haw Young Lee, Dongjin Byun, Joong Kee Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This study investigates bundle-type silicon nanorods (BSNR) that are aimed at improving the discharge capacity and life cycle characteristics of secondary cells, by controlling the shape and etching depth of silicon thick-films produced by electroless etching. The prepared BSNR structure is composed of a columnar bundle, having a diameter of 100 nm and lengths of 1.5 and 3.5 μm. The etching depths of the nanorods have a significant effect on the electrochemical performance characteristics, including the capacity fading and coulombic efficiency. Using a BSNR electrode therefore allows for an anode with a high capacity and efficiency in lithium ion cells, and can help overcome the issues associated with conventional silicon thick-films. Furthermore, as a result of its unique self-relaxant structure, electrode deterioration is improved through mitigation of the volume change.

Original languageEnglish
Pages (from-to)21420-21428
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number36
DOIs
Publication statusPublished - 2014 Dec 12

Keywords

  • Anode
  • Electroless etching
  • Metal-assisted chemical etching
  • Silicon
  • Surface modification

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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