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Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes.

ABSTRACT: The recovery of useful materials from earth-abundant substances is of strategic importance for industrial processes. Despite the fact that Si is the second most abundant element in the Earth's crust, processes to form Si nanomaterials is usually complex, costly and energy-intensive. Here we show that pure Si nanoparticles (SiNPs) can be derived directly from rice husks (RHs), an abundant agricultural byproduct produced at a rate of 1.2 × 10(8) tons/year, with a conversion yield as high as 5% by mass. And owing to their small size (10-40 nm) and porous nature, these recovered SiNPs exhibits high performance as Li-ion battery anodes, with high reversible capacity (2,790 mA h g(-1), seven times greater than graphite anodes) and long cycle life (86% capacity retention over 300 cycles). Using RHs as the raw material source, overall energy-efficient, green, and large scale synthesis of low-cost and functional Si nanomaterials is possible.

SUBMITTER: Liu N

PROVIDER: S-EPMC3665957 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes.

Liu Nian N Huo Kaifu K McDowell Matthew T MT Zhao Jie J Cui Yi Y

Scientific reports 20130101

The recovery of useful materials from earth-abundant substances is of strategic importance for industrial processes. Despite the fact that Si is the second most abundant element in the Earth's crust, processes to form Si nanomaterials is usually complex, costly and energy-intensive. Here we show that pure Si nanoparticles (SiNPs) can be derived directly from rice husks (RHs), an abundant agricultural byproduct produced at a rate of 1.2 × 10(8) tons/year, with a conversion yield as high as 5% by ...[more]

PMID: 23715238

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