Abstract
The current study aims to investigate the influence of high energy milling of nano-silica and magnesium on the products of reduction reaction induced by such mechano-chemical route. Collision energy driven by ball-milling was calculated to enable the surveying of the level of energy on the obtained nano-silicon at the room temperature and in the argon atmosphere. The phase composition analysis was conducted by the Rietveld method. Silicon products of above 97% purity were obtained in a mechanochemically-synthesized system. Morphologically, this route results in a mesoporous silicon nanoparticle with surface area 134.01 m2/g and also a mean pore diameter of 20.12 nm for the Si sample obtained via the highest energy applied, respectively. The carbonized final product is evidenced by Raman spectroscopy. Electrochemical characterizations revealed that the Si/C product exhibit the reversible specific capacity of 3113 mAh.g−1 at a current density of 0.4 A g−1 and electrical resistivity of 1.823 Ω cm2.
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