Direct Growth of 3 D Hierarchical Porous Ni3S2 Nanostructures on Nickel Foam for High-Performance Supercapacitors

Gamze Yilmaz, Xianmao Lu

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

Hierarchical nanostructures grown on conductive 3D scaffold materials are excellent candidates for supercapacitor electrodes. Herein, we report the fabrication and electrochemical performance of 3D Ni3S2 nanoporous structures directly grown on nickel foam via a facile and cost-effective one-step process using Ni foam as both the template and Ni source. An ultrahigh areal capacitance of 7.25 F cm−2 was obtained at a current density of 5 mA cm−2 for the nanoporous Ni3S2 structures. The encouraging performance of Ni3S2 nanoporous structures allowed for the fabrication of asymmetric supercapacitors (ASCs) using Ni3S2 as cathode and activated carbon as anode. The resulting ASC exhibited high volumetric capacitance (4.48 F cm−3 at 6 mA cm−2), high energy density (1.54 mWh cm−3 at a power density of 0.07 W cm−3), and excellent cycling stability (92.7 % retention of the initial capacitance after 5000 cycles at a current density of 16 mA cm−2).

Original languageEnglish
Pages (from-to)719-725
Number of pages7
JournalChemNanoMat
Volume2
Issue number7
DOIs
Publication statusPublished - Jul 2016
Externally publishedYes

Keywords

  • hierarchical structure
  • nanoporous
  • nickel foam
  • nickel sulfide
  • supercapacitors

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