Mesoporous silicon engineered by the reduction of biosilica from rice husk as a high-performance anode for lithium-ion batteries
Date
2013
Authors
Xing, A.
Tian, S.
Tang, H.
Losic, D.
Bao, Z.
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Journal article
Citation
RSC Advances: an international journal to further the chemical sciences, 2013; 3(26):10145-10149
Statement of Responsibility
An Xing, Shuang Tian, Huang Tang, Dusan Losic and Zhihao Bao
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Abstract
In this work we demonstrate a scalable synthetic approach for the transformation of rice husk, a cheap source of biosilica, into highly valuable porous silicon using a magnesiothermic reaction. The synthesized porous silicon with a high porosity (0.62 cm³ g⁻¹) and a large specific surface area (150.1 m² g⁻¹) is a promising material for lithium-ion battery applications. As an anode material, the porous silicon can retain a considerably high reversible capacity of 1220.2 mA h g⁻¹ at a specific discharge–charge current of 1000 mA g⁻¹ after 100 cycles. The approach is generic and can be applied to other sources of biogenic silica to obtain high-performance and highly valuable porous Si for many applications.
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