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A green and facile way to prepare granadilla-like silicon-based anode materials for li-ion batteries

Journal Article


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Abstract


  • A yolk-shell-structured carbon@void@silicon (CVS) anode material in which a void space is created between the inside silicon nanoparticle and the outer carbon shell is considered as a promising candidate for Li-ion cells. Untill now, all the previous yolk-shell composites were fabricated through a templating method, wherein the SiO2 layer acts as a sacrificial layer and creates a void by a selective etching method using toxic hydrofluoric acid. However, this method is complex and toxic. Here, a green and facile synthesis of granadilla-like outer carbon coating encapsulated silicon/carbon microspheres which are composed of interconnected carbon framework supported CVS nanobeads is reported. The silicon granadillas are prepared via a modified templating method in which calcium carbonate was selected as a sacrificial layer and acetylene as a carbon precursor. Therefore, the void space inside and among these CVS nanobeads can be formed by removing CaCO3 with diluted hydrochloric acid. As prepared, silicon granadillas having 30% silicon content deliver a reversible capacity of around 1100 mAh g−1 at a current density of 250 mA g−1 after 200 cycles. Besides, this composite exhibits an excellent rate performance of about 830 and 700 mAh g−1 at the current densities of 1000 and 2000 mA g−1, respectively.

Authors


  •   Zhang, Lei (external author)
  •   Rajagopalan, Ranjusha (external author)
  •   Guo, Haipeng (external author)
  •   Hu, Xianluo (external author)
  •   Dou, Shi Xue
  •   Liu, Hua K.

Publication Date


  • 2016

Citation


  • Zhang, L., Rajagopalan, R., Guo, H., Hu, X., Dou, S. & Liu, H. (2016). A green and facile way to prepare granadilla-like silicon-based anode materials for li-ion batteries. Advanced Functional Materials, 26 440-446.

Scopus Eid


  • 2-s2.0-84959535780

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3078&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2076

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 440

End Page


  • 446

Volume


  • 26

Place Of Publication


  • Germany

Abstract


  • A yolk-shell-structured carbon@void@silicon (CVS) anode material in which a void space is created between the inside silicon nanoparticle and the outer carbon shell is considered as a promising candidate for Li-ion cells. Untill now, all the previous yolk-shell composites were fabricated through a templating method, wherein the SiO2 layer acts as a sacrificial layer and creates a void by a selective etching method using toxic hydrofluoric acid. However, this method is complex and toxic. Here, a green and facile synthesis of granadilla-like outer carbon coating encapsulated silicon/carbon microspheres which are composed of interconnected carbon framework supported CVS nanobeads is reported. The silicon granadillas are prepared via a modified templating method in which calcium carbonate was selected as a sacrificial layer and acetylene as a carbon precursor. Therefore, the void space inside and among these CVS nanobeads can be formed by removing CaCO3 with diluted hydrochloric acid. As prepared, silicon granadillas having 30% silicon content deliver a reversible capacity of around 1100 mAh g−1 at a current density of 250 mA g−1 after 200 cycles. Besides, this composite exhibits an excellent rate performance of about 830 and 700 mAh g−1 at the current densities of 1000 and 2000 mA g−1, respectively.

Authors


  •   Zhang, Lei (external author)
  •   Rajagopalan, Ranjusha (external author)
  •   Guo, Haipeng (external author)
  •   Hu, Xianluo (external author)
  •   Dou, Shi Xue
  •   Liu, Hua K.

Publication Date


  • 2016

Citation


  • Zhang, L., Rajagopalan, R., Guo, H., Hu, X., Dou, S. & Liu, H. (2016). A green and facile way to prepare granadilla-like silicon-based anode materials for li-ion batteries. Advanced Functional Materials, 26 440-446.

Scopus Eid


  • 2-s2.0-84959535780

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3078&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2076

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 440

End Page


  • 446

Volume


  • 26

Place Of Publication


  • Germany