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Heterostructures of Ni–Co–Al layered doublehydroxide assembled on V4C3MXene for high-energy hybrid supercapacitors

Journal Article


Abstract


  • An energy storage system based on a battery-type electrode and a capacitive electrode as a hybrid supercapacitor offers a promising way to construct devices with advantages of both rechargeable batteries and carbon-based supercapacitors. NiCoAl-LDH nanosheets uniformly grow onto micron-scaled MXene sheets to form a NiCoAl-LDH/V4C3Tx heterostructure with three-dimensional interconnected porous network microstructures by a hydrothermal method. NiCoAl-LDH/V4C3Tx composite electrodes show an excellent specific capacity of 627 C g-1 at a current density of 1 A g-1 in 1 M KOH. Especially, the NiCoAl-LDH/V4C3Tx electrodes exhibit a specific capacity of 300 C g-1 even at a high current density of 20 A g-1 in 1 M KOH, showing excellent rate performance. Hybrid supercapacitors, constructed with NiCoAl-LDH/V4C3Tx as the battery-type electrode and activated carbon (AC) as the capacitive electrode, show superior energy densities of 71.7 and 45.0 W h kg-1 at power densities of 830 and 20000 W kg-1 in 1 M KOH, respectively. The excellent capacity retention rate is 98% for the hybrid device after 10000 cycles at 20 A g-1 in 1 M KOH. The NiCoAl-LDH/V4C3Tx heterostructures can be used as promising electrode materials for low-cost hybrid supercapacitor devices.

Authors


  •   Wang, Xin (external author)
  •   Li, Hui (external author)
  •   Li, Han (external author)
  •   Lin, Shuai (external author)
  •   Bai, Jin (external author)
  •   Dai, Jianming (external author)
  •   Liang, Changhao (external author)
  •   Zhu, Xuebin (external author)
  •   Sun, Yuping (external author)
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Wang, X., Li, H., Li, H., Lin, S., Bai, J., Dai, J., Liang, C., Zhu, X., Sun, Y. & Dou, S. (2019). Heterostructures of Ni–Co–Al layered doublehydroxide assembled on V4C3MXene for high-energy hybrid supercapacitors. Journal of Materials Chemistry A, 7 (5), 2291-2300.

Scopus Eid


  • 2-s2.0-85060795981

Number Of Pages


  • 9

Start Page


  • 2291

End Page


  • 2300

Volume


  • 7

Issue


  • 5

Place Of Publication


  • United Kingdom

Abstract


  • An energy storage system based on a battery-type electrode and a capacitive electrode as a hybrid supercapacitor offers a promising way to construct devices with advantages of both rechargeable batteries and carbon-based supercapacitors. NiCoAl-LDH nanosheets uniformly grow onto micron-scaled MXene sheets to form a NiCoAl-LDH/V4C3Tx heterostructure with three-dimensional interconnected porous network microstructures by a hydrothermal method. NiCoAl-LDH/V4C3Tx composite electrodes show an excellent specific capacity of 627 C g-1 at a current density of 1 A g-1 in 1 M KOH. Especially, the NiCoAl-LDH/V4C3Tx electrodes exhibit a specific capacity of 300 C g-1 even at a high current density of 20 A g-1 in 1 M KOH, showing excellent rate performance. Hybrid supercapacitors, constructed with NiCoAl-LDH/V4C3Tx as the battery-type electrode and activated carbon (AC) as the capacitive electrode, show superior energy densities of 71.7 and 45.0 W h kg-1 at power densities of 830 and 20000 W kg-1 in 1 M KOH, respectively. The excellent capacity retention rate is 98% for the hybrid device after 10000 cycles at 20 A g-1 in 1 M KOH. The NiCoAl-LDH/V4C3Tx heterostructures can be used as promising electrode materials for low-cost hybrid supercapacitor devices.

Authors


  •   Wang, Xin (external author)
  •   Li, Hui (external author)
  •   Li, Han (external author)
  •   Lin, Shuai (external author)
  •   Bai, Jin (external author)
  •   Dai, Jianming (external author)
  •   Liang, Changhao (external author)
  •   Zhu, Xuebin (external author)
  •   Sun, Yuping (external author)
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Wang, X., Li, H., Li, H., Lin, S., Bai, J., Dai, J., Liang, C., Zhu, X., Sun, Y. & Dou, S. (2019). Heterostructures of Ni–Co–Al layered doublehydroxide assembled on V4C3MXene for high-energy hybrid supercapacitors. Journal of Materials Chemistry A, 7 (5), 2291-2300.

Scopus Eid


  • 2-s2.0-85060795981

Number Of Pages


  • 9

Start Page


  • 2291

End Page


  • 2300

Volume


  • 7

Issue


  • 5

Place Of Publication


  • United Kingdom