Preparation of nanoporous nickelcopper sulfide on carbon cloth for high-performance hybrid supercapacitors

Dongwei Du, Rong Lan, John Humphreys, Houari Amari, Shanwen Tao

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In this work, nanoporous nickel-copper sulfide on carbon cloth was successfully prepared via sulfurizing the nickel-copper carbonate hydroxide precursor through an anion exchange reaction. The as-fabricated electrode exhibits a high specific capacitance of 938.6 F g−1 at a current density of 1 A g−1 and good rate capability of 76% at 10 A g−1, as well as excellent flexibility. Charge storage analysis demonstrates that the combination of surface-controlled capacitive process and diffusion-controlled Faradaic process, both contribute to the total capacitance. In addition, the good performance of the nanoporous nickel-copper sulfide can be attributed to the possible higher conductivity and porous nanostructures which offers more active sites to yield extrinsic pseudocapacitance. A hybrid supercapacitor was assembled with nickel-copper sulfide as the positive electrode and nitrogen-doped graphene as the …
Original languageEnglish
Pages (from-to)170-180
Number of pages11
JournalElectrochimica Acta
Volume273
Early online date7 Apr 2018
DOIs
Publication statusPublished - 20 May 2018

Keywords

  • Nickel-copper sulfide
  • Nonporous
  • Anion exchange
  • Supercapacitor
  • Pouch cell

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