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Cobalt-doped FeS2 nanospheres with complete solid solubility as a high-performance anode material for sodium-ion batteries

Journal Article


Abstract


  • Considering that the high capacity, long-term cycle life, and high-rate capability of anode materials for sodium-ion batteries (SIBs) is a bottleneck currently, a series of Co-doped FeS2 solid solutions with different Co contents were prepared by a facile solvothermal method, and for the first time their Na-storage properties were investigated. The optimized Co0.5Fe0.5S2 (Fe0.5) has discharge capacities of 0.220 Ah g−1 after 5000 cycles at 2 A g−1 and 0.172 Ah g−1 even at 20 A g−1 with compatible ether-based electrolyte in a voltage window of 0.8–2.9 V. The Fe0.5 sample transforms to layered NaxCo0.5Fe0.5S2 by initial activation, and the layered structure is maintained during following cycles. The redox reactions of NaxCo0.5Fe0.5S2 are dominated by pseudocapacitive behavior, leading to fast Na+ insertion/extraction and durable cycle life. A Na3V2(PO4)3/Fe0.5 full cell was assembled, delivering an initial capacity of 0.340 Ah g−1.

Authors


  •   Hu, Zhe (external author)
  •   Zhang, Kai (external author)
  •   Park, Mihui (external author)
  •   Zhou, Limin (external author)
  •   Lee, Gi-Hyeok (external author)
  •   Shin, Jeongyim (external author)
  •   Chou, Shulei
  •   Chen, Jun
  •   Kang, Yong-Mook (external author)

Publication Date


  • 2016

Citation


  • Zhang, K., Park, M., Zhou, L., Lee, G., Shin, J., Hu, Z., Chou, S., Chen, J. & Kang, Y. (2016). Cobalt-doped FeS2 nanospheres with complete solid solubility as a high-performance anode material for sodium-ion batteries. Angewandte Chemie International Edition, 55 (41), 12822-12826.

Scopus Eid


  • 2-s2.0-84987606007

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2227

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 12822

End Page


  • 12826

Volume


  • 55

Issue


  • 41

Place Of Publication


  • Germany

Abstract


  • Considering that the high capacity, long-term cycle life, and high-rate capability of anode materials for sodium-ion batteries (SIBs) is a bottleneck currently, a series of Co-doped FeS2 solid solutions with different Co contents were prepared by a facile solvothermal method, and for the first time their Na-storage properties were investigated. The optimized Co0.5Fe0.5S2 (Fe0.5) has discharge capacities of 0.220 Ah g−1 after 5000 cycles at 2 A g−1 and 0.172 Ah g−1 even at 20 A g−1 with compatible ether-based electrolyte in a voltage window of 0.8–2.9 V. The Fe0.5 sample transforms to layered NaxCo0.5Fe0.5S2 by initial activation, and the layered structure is maintained during following cycles. The redox reactions of NaxCo0.5Fe0.5S2 are dominated by pseudocapacitive behavior, leading to fast Na+ insertion/extraction and durable cycle life. A Na3V2(PO4)3/Fe0.5 full cell was assembled, delivering an initial capacity of 0.340 Ah g−1.

Authors


  •   Hu, Zhe (external author)
  •   Zhang, Kai (external author)
  •   Park, Mihui (external author)
  •   Zhou, Limin (external author)
  •   Lee, Gi-Hyeok (external author)
  •   Shin, Jeongyim (external author)
  •   Chou, Shulei
  •   Chen, Jun
  •   Kang, Yong-Mook (external author)

Publication Date


  • 2016

Citation


  • Zhang, K., Park, M., Zhou, L., Lee, G., Shin, J., Hu, Z., Chou, S., Chen, J. & Kang, Y. (2016). Cobalt-doped FeS2 nanospheres with complete solid solubility as a high-performance anode material for sodium-ion batteries. Angewandte Chemie International Edition, 55 (41), 12822-12826.

Scopus Eid


  • 2-s2.0-84987606007

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2227

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 12822

End Page


  • 12826

Volume


  • 55

Issue


  • 41

Place Of Publication


  • Germany