A Ni–Co sulfide nanosheet/carbon nanotube hybrid film for high-energy and high-power flexible supercapacitors

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

54 Scopus Citations
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Author(s)

  • Xiaotong Jiang
  • Wenlei Guo
  • Lei Wang
  • Tao Zhang
  • Yash Boyjoo
  • Wenping Si
  • Feng Hou
  • Jian Liu
  • Shi Xue Dou
  • Ji Liang

Detail(s)

Original languageEnglish
Pages (from-to)355-362
Journal / PublicationCarbon
Volume178
Online published17 Mar 2021
Publication statusPublished - 30 Jun 2021

Abstract

Flexible energy storage is the bottleneck for a variety of advanced electronic devices, and transition metal sulfides are regarded as an ideal candidate for this application due to their high capacitance, versatile microstructures, and low cost. However, to render this family of materials with high mechanical flexibility while maintaining their favorable electrochemical properties is especially challenging. Herein, we report a CNT@NiCo2S4 hybrid film, in which bunches of ultrathin NiCo2S4 nanosheet are firmly and uniformly anchored on a 3D CNT network. This material possesses tunable microstructures, high mechanical flexibility, good conductivity as well as lightweight, making it readily deployable in a flexible supercapacitor. Significantly, the asymmetric flexible supercapacitor based on this material possesses a high voltage output (1.8 V), a high energy/power density (59.5/34.5 Wh kg−1 at 900/18000 W kg−1), outstanding cycling stability (80.64% capacity retention after 10000 cycles), and excellent mechanical flexibility to withstand various deformations, all without sacrificing its performance. Moreover, this strategy has the potential to be extended to other metal sulfides or other carbon-substrates, which opens new avenues for the facile design and manipulation of flexible functional materials for future energy storage.

Research Area(s)

  • Asymmetric supercapacitors, Carbon nanotubes, Flexible, NiCo2S4, Supercapacitors

Citation Format(s)

A Ni–Co sulfide nanosheet/carbon nanotube hybrid film for high-energy and high-power flexible supercapacitors. / Lu, Pengyi; Jiang, Xiaotong; Guo, Wenlei et al.
In: Carbon, Vol. 178, 30.06.2021, p. 355-362.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review