Mesoporous Nano-Si Anode for Li-ion Batteries Produced by Magnesio-Mechanochemical Reduction of Amorphous SiO2

Yoon Hwa, Won Sik Kim, Byeong Chul Yu, Seong Hyeon Hong, Hun Joon Sohn

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The synthesis of nano-sized Si with various microstructures has been studied intensively to produce anode materials for Li-rechargeable batteries. Methods such as chemical/physical vapor deposition (CVD/PVD) and wet-chemical processes are currently used to produce nano-sized Si; however, the complicated synthesis procedures and low production yields are critical problems that hinder commercialization. We present a method for producing large quantities of mesoporous nano-sized Si through the reduction of amorphous SiO2 with Mg metal, by using a high-energy mechanical milling process (i.e., magnesio-mechanochemical processing) for 1h. A mesoporous nano-sized Si electrode shows excellent electrochemical performance as an anode for Li-ion batteries, achieving a capacity greater than 1600mAhg-1 over 30cycles.

Original languageEnglish (US)
Pages (from-to)327-331
Number of pages5
JournalEnergy Technology
Volume1
Issue number5-6
DOIs
StatePublished - Jun 1 2013
Externally publishedYes

Keywords

  • Electrochemistry
  • Li-ion batteries
  • Mesoporous materials
  • Milling
  • Silicon

ASJC Scopus subject areas

  • Energy(all)

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