Highly reversible lithium storage in Bacillus subtilis-directed porous Co3O4 nanostructures

Hyun Woo Shim, Yun Ho Jin, Seung Deok Seo, Seung Hun Lee, Dong-Wan Kim

Research output: Contribution to journalArticle

149 Citations (Scopus)

Abstract

In this work, a simple, high-yield biomineralization process is reported for cobalt oxide nanostructures using Gram-positive bacteria, Bacillus subtilis, as the soft templates. Rod-type cobalt oxide is prepared at room temperature through an electrostatic interaction between the functional surface structures of the bacteria and the cobalt ions in an aqueous solution. Additionally, porous Co3O4 hollow rods are formed through a subsequent heat treatment at 300 °C. These rods have a high surface area and exhibited an excellent electrochemical performance for rechargeable Li-ion batteries. This facile, inexpensive, and environmentally benign synthesis for transition metal oxides with unique nanostructures can be used for several practical applications, such as batteries, catalysts, sensors, and supercapacitors.

Original languageEnglish
Pages (from-to)443-449
Number of pages7
JournalACS Nano
Volume5
Issue number1
DOIs
Publication statusPublished - 2011 Jan 25
Externally publishedYes

Keywords

  • Bacillus subtilis
  • Cobalt oxide
  • Lithium-ion batteries
  • Nanostructures
  • Soft template

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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