High-capacity, microporous Cu6Sn5-Sn anodes for li-ion batteries

Lynn Trahey, John T. Vaughey, Harold H. Kung, Michael M. Thackeray

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Three-dimensional, microporous Cu6Sn5-Sn architectures were created by electrodeposition of copper and tin onto sintered copper foam substrates and evaluated as anodes for lithium-ion batteries. The electrodes were characterized before and after cycling by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectrometry. Before cycling, the electrochemically deposited films consisted of a combination of crystalline Cu6Sn5 and Sn, whereas after cycling, the films appeared amorphous to X-rays. When evaluated in coin cells against metallic lithium, the composite Cu6Sn5-Sn electrodes delivered a reversible capacity of 670 mAhg, which is significantly greater than the capacity achieved previously from powdered (ballmilled) and thin-film (sputtered) Cu6 Sn5 electrodes, typically 200-350 mAhg.

Original languageEnglish
Pages (from-to)A385-A389
JournalJournal of the Electrochemical Society
Volume156
Issue number5
DOIs
Publication statusPublished - Apr 8 2009

ASJC Scopus subject areas

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

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