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Fabrication of Hierarchical Porous Carbon Nanoflakes for High-Performance Supercapacitors

Journal Article


Abstract


  • In the current work, the carbon nanoflakes (CNs-Fe/KOH) and porous carbon (PC-Ni/KOH) have been produced by using Fe(NO 3 ) 3 /KOH and Ni(NO 3 ) 2 /KOH as the cographitization/activation catalysts to treat the natural plane tree fluff, respectively. The as-prepared carbon materials show different morphologies when treated with different metal ions. Compared with PC-Ni/KOH, the CNs-Fe/KOH have both high graphitization degree (I G /I D = 1.53) and large S BET (1416 m 2 /g). In a three-electrode setup, the CNs-Fe/KOH electrode shows a high specific capacitance of 253 F/g at 10 A/g, with a capacitance retention of 92.64% after 10000 cycles in 2 M H 2 SO 4 aqueous solution, which is far better than the sample without Fe 3+ addition. In 1 M LiPF 6 in ethylene carbonate/diethyl carbonate organic solution, CNs-Fe/KOH-based symmetric supercapacitor also presents an excellent specific capacitance of 32.2 F/g at 1 A/g. In addition, an energy density of 39.98 W h/kg can be achieved at the power density of 1.49 kW/kg. Influence of metal ions on the morphology and structure as well as electrochemical performance of the carbon materials are further analyzed in detail. The current work provides a novel path for design and fabrication of supercapacitor electrode materials with promising electrochemical performances.

UOW Authors


  •   Yao, Yamin (external author)
  •   Zhang, Yunqiang (external author)
  •   Li, Li (external author)
  •   Wang, Shulan (external author)
  •   Dou, Shi Xue
  •   Liu, Xuan (external author)

Publication Date


  • 2017

Citation


  • Yao, Y., Zhang, Y., Li, L., Wang, S., Dou, S. & Liu, X. (2017). Fabrication of Hierarchical Porous Carbon Nanoflakes for High-Performance Supercapacitors. ACS Applied Materials and Interfaces, 9 (40), 34944-34953.

Scopus Eid


  • 2-s2.0-85031129626

Number Of Pages


  • 9

Start Page


  • 34944

End Page


  • 34953

Volume


  • 9

Issue


  • 40

Place Of Publication


  • United States

Abstract


  • In the current work, the carbon nanoflakes (CNs-Fe/KOH) and porous carbon (PC-Ni/KOH) have been produced by using Fe(NO 3 ) 3 /KOH and Ni(NO 3 ) 2 /KOH as the cographitization/activation catalysts to treat the natural plane tree fluff, respectively. The as-prepared carbon materials show different morphologies when treated with different metal ions. Compared with PC-Ni/KOH, the CNs-Fe/KOH have both high graphitization degree (I G /I D = 1.53) and large S BET (1416 m 2 /g). In a three-electrode setup, the CNs-Fe/KOH electrode shows a high specific capacitance of 253 F/g at 10 A/g, with a capacitance retention of 92.64% after 10000 cycles in 2 M H 2 SO 4 aqueous solution, which is far better than the sample without Fe 3+ addition. In 1 M LiPF 6 in ethylene carbonate/diethyl carbonate organic solution, CNs-Fe/KOH-based symmetric supercapacitor also presents an excellent specific capacitance of 32.2 F/g at 1 A/g. In addition, an energy density of 39.98 W h/kg can be achieved at the power density of 1.49 kW/kg. Influence of metal ions on the morphology and structure as well as electrochemical performance of the carbon materials are further analyzed in detail. The current work provides a novel path for design and fabrication of supercapacitor electrode materials with promising electrochemical performances.

UOW Authors


  •   Yao, Yamin (external author)
  •   Zhang, Yunqiang (external author)
  •   Li, Li (external author)
  •   Wang, Shulan (external author)
  •   Dou, Shi Xue
  •   Liu, Xuan (external author)

Publication Date


  • 2017

Citation


  • Yao, Y., Zhang, Y., Li, L., Wang, S., Dou, S. & Liu, X. (2017). Fabrication of Hierarchical Porous Carbon Nanoflakes for High-Performance Supercapacitors. ACS Applied Materials and Interfaces, 9 (40), 34944-34953.

Scopus Eid


  • 2-s2.0-85031129626

Number Of Pages


  • 9

Start Page


  • 34944

End Page


  • 34953

Volume


  • 9

Issue


  • 40

Place Of Publication


  • United States