Solution-grown germanium nanowire anodes for lithium-ion batteries

Aaron Michael Chockla, Kyle C. Klavetter, C. Buddie Mullins, Brian A. Korgel*

*Corresponding author for this work

Research output: Contribution to journalArticle

137 Scopus citations

Abstract

Solution-grown germanium (Ge) nanowires were tested as high capacity anodes in lithium ion (Li-ion) batteries. Nanowire films were formulated and cast as slurries with conductive carbon (7:1 Ge:C w/w), PVdF binder and 1.0 M LiPF 6 dissolved in various solvents as electrolyte. The addition of fluorethylene carbonate (FEC) to the electrolyte was critical to achieving stable battery cycling and reversible capacities as high as 1248 mA h g -1 after 100 cycles, which is close to the theoretical capacity of 1,384 mA h g -1. Ge nanowire anodes also exhibited high rate capability, with reversible cycling above 600 mA h g -1 for 1200 cycles at a rate of 1C. The batteries could also be discharged at 10C with a capacity of 900 mA h g -1 when charged at 1C.

Original languageEnglish (US)
Pages (from-to)4658-4664
Number of pages7
JournalACS Applied Materials and Interfaces
Volume4
Issue number9
DOIs
StatePublished - Sep 26 2012

Keywords

  • anode
  • electrochemistry
  • energy storage
  • germanium nanowires
  • lithium-ion battery

ASJC Scopus subject areas

  • Materials Science(all)

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    Chockla, A. M., Klavetter, K. C., Mullins, C. B., & Korgel, B. A. (2012). Solution-grown germanium nanowire anodes for lithium-ion batteries. ACS Applied Materials and Interfaces, 4(9), 4658-4664. https://doi.org/10.1021/am3010253