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Biochemistry-derived porous carbon-encapsulated metal oxide nanocrystals for enhanced sodium storage

Journal Article


Abstract


  • Transitional metal oxides are promising anode materials for sodium ion batteries (SIBs) due to their high theoretical capacities and material abundance; however, their sodium storage capability is significantly hindered by the sluggish sodiation/desodiation reaction kinetics. Herein, towards achieving fast and durable sodiation/desodiation reaction, Fe3O4 and Co3O4 nanocrystals encapsulated in carbon micro-spheres are synthesized via a biochemistry approach using recombinant elastin-like polypeptides containing hexahistidine tag (ELP16-His) followed by annealing. Fe3O4 and Co3O4 nanocrystals of approximately 5nm in size, which are uniformly dispersed in a carbon matrix, are obtained. The carbon-encapsulated metal oxides exhibit encouraging sodium storage capacities (657 and 246mAhg-1 at 0.1 and 2Ag-1, respectively, for carbon-encapsulated Fe3O4; 583 and 183mAhg-1 at 0.1 and 2Ag-1, respectively, for carbon-encapsulated Co3O4), and have a high capacity retention after 100 cycles at 0.5Ag-1. The superior electrochemical properties of the carbon-encapsulated metal oxide nanocrystals demonstrate their potential for use as anode materials for high-capacity, high-rate and durable sodium storage.

Authors


  •   Zhou, Yanping (external author)
  •   Sun, Wenping
  •   Rui, Xianhong (external author)
  •   Zhou, Yan (external author)
  •   Ng, Wun Jern (external author)
  •   Yan, QingYu (external author)
  •   Fong, Eileen (external author)

Publication Date


  • 2016

Citation


  • Zhou, Y., Sun, W., Rui, X., Zhou, Y., Ng, W., Yan, Q. & Fong, E. (2016). Biochemistry-derived porous carbon-encapsulated metal oxide nanocrystals for enhanced sodium storage. Nano Energy, 21 71-79.

Scopus Eid


  • 2-s2.0-84955317173

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2078

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 71

End Page


  • 79

Volume


  • 21

Place Of Publication


  • Netherlands

Abstract


  • Transitional metal oxides are promising anode materials for sodium ion batteries (SIBs) due to their high theoretical capacities and material abundance; however, their sodium storage capability is significantly hindered by the sluggish sodiation/desodiation reaction kinetics. Herein, towards achieving fast and durable sodiation/desodiation reaction, Fe3O4 and Co3O4 nanocrystals encapsulated in carbon micro-spheres are synthesized via a biochemistry approach using recombinant elastin-like polypeptides containing hexahistidine tag (ELP16-His) followed by annealing. Fe3O4 and Co3O4 nanocrystals of approximately 5nm in size, which are uniformly dispersed in a carbon matrix, are obtained. The carbon-encapsulated metal oxides exhibit encouraging sodium storage capacities (657 and 246mAhg-1 at 0.1 and 2Ag-1, respectively, for carbon-encapsulated Fe3O4; 583 and 183mAhg-1 at 0.1 and 2Ag-1, respectively, for carbon-encapsulated Co3O4), and have a high capacity retention after 100 cycles at 0.5Ag-1. The superior electrochemical properties of the carbon-encapsulated metal oxide nanocrystals demonstrate their potential for use as anode materials for high-capacity, high-rate and durable sodium storage.

Authors


  •   Zhou, Yanping (external author)
  •   Sun, Wenping
  •   Rui, Xianhong (external author)
  •   Zhou, Yan (external author)
  •   Ng, Wun Jern (external author)
  •   Yan, QingYu (external author)
  •   Fong, Eileen (external author)

Publication Date


  • 2016

Citation


  • Zhou, Y., Sun, W., Rui, X., Zhou, Y., Ng, W., Yan, Q. & Fong, E. (2016). Biochemistry-derived porous carbon-encapsulated metal oxide nanocrystals for enhanced sodium storage. Nano Energy, 21 71-79.

Scopus Eid


  • 2-s2.0-84955317173

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2078

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 71

End Page


  • 79

Volume


  • 21

Place Of Publication


  • Netherlands