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Published Online April 6, 2006
Science DOI: 10.1126/science.1122716

Reports

Submitted on November 16, 2005
Accepted on March 24, 2006

Virus-Enabled Synthesis and Assembly of Nanowires for Lithium Ion Battery Electrodes

Ki Tae Nam 1, Dong-Wan Kim 2, Pil J. Yoo 3, Chung-Yi Chiang 4, Nonglak Meethong 5, Paula T. Hammond 3, Yet-Ming Chiang 5, Angela M. Belcher 6*

1 Department of Materials Science and Engineering; Institute for Soldier Nanotechnologies
2 Department of Materials Science and Engineering; Present address: Materials Science and Technology Division, Korea Institute of Science and Technology, Seoul 136-791, Korea.
3 Department of Chemical Engineering; Institute for Soldier Nanotechnologies
4 Department of Materials Science and Engineering; Institute of Collaborative Biotechnology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5 Department of Materials Science and Engineering
6 Department of Materials Science and Engineering; Biological Engineering Division; Institute for Soldier Nanotechnologies; Institute of Collaborative Biotechnology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

* To whom correspondence should be addressed.
Angela M. Belcher , E-mail: belcher{at}mit.edu

Both materials selection and assembly are ongoing issues in the development of smaller, more flexible batteries. Cobalt oxide has shown excellent electrochemical cycling properties and it thus under consideration as an electrode for advanced lithium batteries. We use viruses to synthesize and assemble nanowires of cobalt oxide at room temperature. By incorporating gold binding peptides into the filament coat, we could form hybrid gold-cobalt oxide wires that improved battery capacity. Combining the virus templated synthesis at the peptide level and our methods for the control of two dimensional assembly of viruses on polyelectrolyte multilayers provides a systematic platform for integrating these nanomaterials to form thin, flexible lithium ion batteries.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Science. ISSN 0036-8075 (print), 1095-9203 (online)