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Controlled fabrication of Si nanoparticles on graphene sheets for Li-ion batteries

Journal Article


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Abstract


  • A new route is presented for the synthesis of Si nanoparticle/Graphene (Si-Gr) composite by a sonochemical method and then magnesiothermic reduction process. During the process, silica particles were firstly synthesized and deposited on the surface of graphene oxide (SiO2-GO) by ultrasonic waves, subsequent low-temperature magnesiothermic reduction transformed SiO 2 to Si nanoparticles in situ on graphene sheets. The phase of the obtained materials was influenced by the weight ratio of Mg to SiO 2-GO. With the optimized ratio of 1 : 1, we can get Si nanoparticles on Gr sheets, with the average particle size of Si around 30 nm. Accordingly, the resultant Si-Gr with 78 wt% Si inside delivered a reversible capacity of 1100 mA h g-1, with very little fading when the charge rates change from 100 mA g-1 to 2000 mA g-1 and then back to 100 mA g-1. Thus, this strategy offers an efficient method for the controlled synthesis of Si nanoparticles on Gr sheets with a high rate performance, attributing to combination of the nanosized Si particles and the graphene. © 2013 The Royal Society of Chemistry.

Authors


  •   Zhu, Shenmin (external author)
  •   Zhu, Chengling (external author)
  •   Ma, Jun (external author)
  •   Meng, Qing (external author)
  •   Guo, Zaiping
  •   Yu, Ziyong (external author)
  •   Lu, Tao (external author)
  •   Li, Yao (external author)
  •   Zhang, Di (external author)
  •   Lau, W (external author)

Publication Date


  • 2013

Citation


  • Zhu, S., Zhu, C., Ma, J., Meng, Q., Guo, Z., Yu, Z., Lu, T., Li, Y., Zhang, D. & Lau, W. Ming. (2013). Controlled fabrication of Si nanoparticles on graphene sheets for Li-ion batteries. RSC Advances, 3 (17), 6141-6146.

Scopus Eid


  • 2-s2.0-84875765350

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2349&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1340

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 6141

End Page


  • 6146

Volume


  • 3

Issue


  • 17

Place Of Publication


  • United Kingdom

Abstract


  • A new route is presented for the synthesis of Si nanoparticle/Graphene (Si-Gr) composite by a sonochemical method and then magnesiothermic reduction process. During the process, silica particles were firstly synthesized and deposited on the surface of graphene oxide (SiO2-GO) by ultrasonic waves, subsequent low-temperature magnesiothermic reduction transformed SiO 2 to Si nanoparticles in situ on graphene sheets. The phase of the obtained materials was influenced by the weight ratio of Mg to SiO 2-GO. With the optimized ratio of 1 : 1, we can get Si nanoparticles on Gr sheets, with the average particle size of Si around 30 nm. Accordingly, the resultant Si-Gr with 78 wt% Si inside delivered a reversible capacity of 1100 mA h g-1, with very little fading when the charge rates change from 100 mA g-1 to 2000 mA g-1 and then back to 100 mA g-1. Thus, this strategy offers an efficient method for the controlled synthesis of Si nanoparticles on Gr sheets with a high rate performance, attributing to combination of the nanosized Si particles and the graphene. © 2013 The Royal Society of Chemistry.

Authors


  •   Zhu, Shenmin (external author)
  •   Zhu, Chengling (external author)
  •   Ma, Jun (external author)
  •   Meng, Qing (external author)
  •   Guo, Zaiping
  •   Yu, Ziyong (external author)
  •   Lu, Tao (external author)
  •   Li, Yao (external author)
  •   Zhang, Di (external author)
  •   Lau, W (external author)

Publication Date


  • 2013

Citation


  • Zhu, S., Zhu, C., Ma, J., Meng, Q., Guo, Z., Yu, Z., Lu, T., Li, Y., Zhang, D. & Lau, W. Ming. (2013). Controlled fabrication of Si nanoparticles on graphene sheets for Li-ion batteries. RSC Advances, 3 (17), 6141-6146.

Scopus Eid


  • 2-s2.0-84875765350

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2349&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1340

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 6141

End Page


  • 6146

Volume


  • 3

Issue


  • 17

Place Of Publication


  • United Kingdom