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Si Nanocrystal-Embedded SiOxnanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials

Journal Article


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Abstract


  • Silicon (Si) based materials are highly desirable to replace currently used graphite anode for lithium ion batteries. Nevertheless, its usage is still a big challenge due to poor battery performance and scale-up issue. In addition, two-dimensional (2D) architectures, which remain unresolved so far, would give them more interesting and unexpected properties. Herein, we report a facile, cost-effective, and scalable approach to synthesize Si nanocrystals embedded 2D SiO x nanofoils for next-generation lithium ion batteries through a solution-evaporation-induced interfacial sol-gel reaction of hydrogen silsesquioxane (HSiO 1.5 , HSQ). The unique nature of the thus-prepared centimeter scale 2D nanofoil with a large surface area enables ultrafast Li + insertion and extraction, with a reversible capacity of more than 650 mAh g -1 , even at a high current density of 50 C (50 A g -1 ). Moreover, the 2D nanostructured Si/SiO x nanofoils show excellent cycling performance up to 200 cycles and maintain their initial dimensional stability. This superior performance stems from the peculiar nanoarchitecture of 2D Si/SiO x nanofoils, which provides short diffusion paths for lithium ions and abundant free space to effectively accommodate the huge volume changes of Si during cycling.

Authors


  •   Yoo, Hyundong (external author)
  •   Park, Eunjun (external author)
  •   Bae, Juhye (external author)
  •   Lee, Jaewoo (external author)
  •   Chung, Dong Jae (external author)
  •   Jo, Yong (external author)
  •   Park, Min-Sik (external author)
  •   Kim, Jung Ho
  •   Dou, Shi Xue
  •   Kim, Young-Jun (external author)
  •   Kim, Hansu (external author)

Publication Date


  • 2018

Citation


  • Yoo, H., Park, E., Bae, J., Lee, J., Chung, D. Jae., Jo, Y. Nam., Park, M., Kim, J. Ho., Dou, S. Xue., Kim, Y. & Kim, H. (2018). Si Nanocrystal-Embedded SiOxnanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials. Scientific Reports, 8 (1), 6904-1-6904-9.

Scopus Eid


  • 2-s2.0-85046462912

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4146&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3096

Has Global Citation Frequency


Start Page


  • 6904-1

End Page


  • 6904-9

Volume


  • 8

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • Silicon (Si) based materials are highly desirable to replace currently used graphite anode for lithium ion batteries. Nevertheless, its usage is still a big challenge due to poor battery performance and scale-up issue. In addition, two-dimensional (2D) architectures, which remain unresolved so far, would give them more interesting and unexpected properties. Herein, we report a facile, cost-effective, and scalable approach to synthesize Si nanocrystals embedded 2D SiO x nanofoils for next-generation lithium ion batteries through a solution-evaporation-induced interfacial sol-gel reaction of hydrogen silsesquioxane (HSiO 1.5 , HSQ). The unique nature of the thus-prepared centimeter scale 2D nanofoil with a large surface area enables ultrafast Li + insertion and extraction, with a reversible capacity of more than 650 mAh g -1 , even at a high current density of 50 C (50 A g -1 ). Moreover, the 2D nanostructured Si/SiO x nanofoils show excellent cycling performance up to 200 cycles and maintain their initial dimensional stability. This superior performance stems from the peculiar nanoarchitecture of 2D Si/SiO x nanofoils, which provides short diffusion paths for lithium ions and abundant free space to effectively accommodate the huge volume changes of Si during cycling.

Authors


  •   Yoo, Hyundong (external author)
  •   Park, Eunjun (external author)
  •   Bae, Juhye (external author)
  •   Lee, Jaewoo (external author)
  •   Chung, Dong Jae (external author)
  •   Jo, Yong (external author)
  •   Park, Min-Sik (external author)
  •   Kim, Jung Ho
  •   Dou, Shi Xue
  •   Kim, Young-Jun (external author)
  •   Kim, Hansu (external author)

Publication Date


  • 2018

Citation


  • Yoo, H., Park, E., Bae, J., Lee, J., Chung, D. Jae., Jo, Y. Nam., Park, M., Kim, J. Ho., Dou, S. Xue., Kim, Y. & Kim, H. (2018). Si Nanocrystal-Embedded SiOxnanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials. Scientific Reports, 8 (1), 6904-1-6904-9.

Scopus Eid


  • 2-s2.0-85046462912

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4146&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3096

Has Global Citation Frequency


Start Page


  • 6904-1

End Page


  • 6904-9

Volume


  • 8

Issue


  • 1

Place Of Publication


  • United Kingdom