Rice husk-originating silicon-graphite composites for advanced lithium ion battery anodes

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Rice husk is produced in a massive amount worldwide as a byproduct of rice cultivation. Rice husk contains approximately 20 wt% of mesoporous SiO2. We produce mesoporous silicon (Si) by reducing the rice husk-originating SiO2 using a magnesio-milling process. Taking advantage of meso-porosity and large available quantity, we apply rice husk-originating Si to lithium ion battery anodes in a composite form with commercial graphite. By varying the mass ratio between these two components, trade-off relation between specific capacity and cycle life was observed. A control lable pre-lithiation scheme was adopted to increase the initial Coulombic efficiency and energy density. The series of electrochemical results suggest that rice husk-originating Si-graphite composites are promising candidates for high capacity lithium ion battery anodes, with the prominent advantages in battery performance and scalability.
Publisher
SPRINGEROPEN
Issue Date
2017
Language
English
Article Type
Article
Citation

NANO CONVERGENCE, v.4

ISSN
2196-5404
DOI
10.1186/s40580-017-0118-x
URI
http://hdl.handle.net/10203/261688
Appears in Collection
EEW-Journal Papers(저널논문)
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