Recycling rice husks for high-capacity lithium battery anodes

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The rice husk is the outer covering of a rice kernel and protects the inner ingredients from external attack by insects and bacteria. To perform this function while ventilating air and moisture, rice plants have developed unique nanoporous silica layers in their husks through years of natural evolution. Despite the massive amount of annual production near 108 tons worldwide, so far rice husks have been recycled only for low-value agricultural items. In an effort to recycle rice husks for high-value applications, we convert the silica to silicon and use it for high-capacity lithium battery anodes. Taking advantage of the interconnected nanoporous structure naturally existing in rice husks, the converted silicon exhibits excellent electrochemical performance as a lithium battery anode, suggesting that rice husks can be a massive resource for use in high-capacity lithium battery negative electrodes.
Publisher
NATL ACAD SCIENCES
Issue Date
2013-07
Language
English
Article Type
Article
Keywords

ION BATTERIES; SILICON UPTAKE; PERFORMANCE; ELECTRODES; REDUCTION; STORAGE; PLANTS

Citation

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.110, no.30, pp.12229 - 12234

ISSN
0027-8424
DOI
10.1073/pnas.1305025110
URI
http://hdl.handle.net/10203/192740
Appears in Collection
CBE-Journal Papers(저널논문)EEW-Journal Papers(저널논문)
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