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Few-layered Ni(OH)2 nanosheets for high-performance supercapacitors

Journal Article


Abstract


  • Few-layered Ni(OH)2 nanosheets (4–5 nm in thickness) are synthesized towards high-performance supercapacitors. The ultrathin Ni(OH)2 nanosheets show high specific capacitance and good rate capability in both three-electrode and asymmetric devices. In the three-electrode device, the Ni(OH)2 nanosheets deliver a high capacitance of 2064 F g−1 at 2 A g−1, and the capacitance still has a retention of 1837 F g−1 at a high current density of 20 A g−1. Such excellent performance is by far one of the best for Ni(OH)2 electrodes. In the two-electrode asymmetric device, the specific capacitance is 248 F g−1 at 1 A g−1, and reaches 113 F g−1 at 20 A g−1. The capacitance of the asymmetric device maintains to be 166 F g−1 during the 4000th cycle at 2 A g−1, suggesting good cycling stability of the device. Besides, the asymmetric device exhibits gravimetric energy density of 22 Wh kg−1 at a power density of 0.8 kW kg−1. The present results demonstrate that the ultrathin Ni(OH)2 nanosheets are highly attractive electrode materials for achieving fast charging/discharging and high-capacity supercapacitors.

UOW Authors


  •   Sun, Wenping
  •   Rui, Xianhong (external author)
  •   Ulaganathan, Mani (external author)
  •   Madhavi, Srinivasan (external author)
  •   Yan, QingYu (external author)

Publication Date


  • 2015

Citation


  • Sun, W., Rui, X., Ulaganathan, M., Madhavi, S. & Yan, Q. (2015). Few-layered Ni(OH)2 nanosheets for high-performance supercapacitors. Journal of Power Sources, 295 323-328.

Scopus Eid


  • 2-s2.0-84937124567

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 323

End Page


  • 328

Volume


  • 295

Place Of Publication


  • Netherlands

Abstract


  • Few-layered Ni(OH)2 nanosheets (4–5 nm in thickness) are synthesized towards high-performance supercapacitors. The ultrathin Ni(OH)2 nanosheets show high specific capacitance and good rate capability in both three-electrode and asymmetric devices. In the three-electrode device, the Ni(OH)2 nanosheets deliver a high capacitance of 2064 F g−1 at 2 A g−1, and the capacitance still has a retention of 1837 F g−1 at a high current density of 20 A g−1. Such excellent performance is by far one of the best for Ni(OH)2 electrodes. In the two-electrode asymmetric device, the specific capacitance is 248 F g−1 at 1 A g−1, and reaches 113 F g−1 at 20 A g−1. The capacitance of the asymmetric device maintains to be 166 F g−1 during the 4000th cycle at 2 A g−1, suggesting good cycling stability of the device. Besides, the asymmetric device exhibits gravimetric energy density of 22 Wh kg−1 at a power density of 0.8 kW kg−1. The present results demonstrate that the ultrathin Ni(OH)2 nanosheets are highly attractive electrode materials for achieving fast charging/discharging and high-capacity supercapacitors.

UOW Authors


  •   Sun, Wenping
  •   Rui, Xianhong (external author)
  •   Ulaganathan, Mani (external author)
  •   Madhavi, Srinivasan (external author)
  •   Yan, QingYu (external author)

Publication Date


  • 2015

Citation


  • Sun, W., Rui, X., Ulaganathan, M., Madhavi, S. & Yan, Q. (2015). Few-layered Ni(OH)2 nanosheets for high-performance supercapacitors. Journal of Power Sources, 295 323-328.

Scopus Eid


  • 2-s2.0-84937124567

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 323

End Page


  • 328

Volume


  • 295

Place Of Publication


  • Netherlands