Highly Reversible Lithium Storage in Bacillus subtilis-Directed Porous Co3O4 Nanostructures

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 s...

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Bibliographic Details
Published in:ACS nano 2011-01, Vol.5 (1), p.443-449
Main Authors: Shim, Hyun-Woo, Jin, Yun-Ho, Seo, Seung-Deok, Lee, Seung-Hun, Kim, Dong-Wan
Format: Article
Language:English
Subjects:
Bacillus subtilis - cytology
Bacillus subtilis - metabolism
Cell Wall - metabolism
Cobalt - chemistry
Cobalt - metabolism
Electric Power Supplies
Electrochemistry
Lithium - chemistry
Nanostructures - chemistry
Nanotechnology - methods
Oxides - chemistry
Oxides - metabolism
Porosity
Surface Properties
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Summary: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.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn1021605