Jump to main content
Jump to site search


Design of porous cobalt sulfide nanosheets array on Ni foam from zeolitic imidazolate frameworks as an advanced electrode for supercapacitors

Abstract

Porous nanosheet-structured electrode materials are very attractive for high-efficiency storage of electrochemical energy. Herein, porous cobalt sulfide nanosheets array on Ni foam (Co9S8-NSA/NF) is successfully fabricated by a facile method, which involves the uniform growth of 2D Co-based leaf-like zeolitc imidazole frameworks (Co-ZIF-L) on Ni foam followed by subsequent sulfurization with thioacetamide (TAA). Benefiting from the unique porous nanosheets array architecture and conductive substrate, the Co9S8-NSA/NF exhibits excellent electrochemical performance with high capacitance (1098.8 F g-1 at 0.5 A g-1), good rate capacity (54.6% retention at 10 A g-1) and long-term stability (87.4% retention over 1000 cycles), when acted as a binder-free electrode for supercapacitor. Furthermore, an assembled asymmetric supercapacitor device using as-fabricated Co9S8-NSA as the positive electrode and activated carbon (AC) as the negative electrode also exhibits a high energy density of 20.0 Wh kg-1 at a high power density of 828.5 W kg-1. The method developed here can be extended to the construction of other structured metal (mono or mixed) sulfides electrode materials for more efficient energy storage.

Back to tab navigation

Supplementary files

Publication details

The article was accepted on 06 Dec 2017 and first published on 06 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07931A
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    Design of porous cobalt sulfide nanosheets array on Ni foam from zeolitic imidazolate frameworks as an advanced electrode for supercapacitors

    X. Han, K. Tao, D. Wang and L. Han, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07931A

Search articles by author

Spotlight

Advertisements