• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Research Online
    • Journal articles
    • View Item
    • Home
    • Griffith Research Online
    • Journal articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Nitrogen and Sulfur Vacancies in Carbon Shell to Tune Charge Distribution of Co6Ni3S8 Core and Boost Sodium Storage

    Author(s)
    Zou, Yihui
    Gu, Yu
    Hui, Bin
    Yang, Xianfeng
    Liu, Hongwei
    Chen, Shuai
    Cai, Rongsheng
    Sun, Jin
    Zhang, Xiaoli
    Yang, Dongjiang
    Griffith University Author(s)
    Yang, Dongjiang
    Year published
    2020
    Metadata
    Show full item record
    Abstract
    Recently, the metal sulfide-carbon nanocomposites have been suggested as a low-cost alternative to lithium ion batteries, but commercial application is seriously hindered by their relatively inferior cyclic performance. Herein, N and S vacancies in an N,S co-doped carbon (NSC) shell for anchoring a new bimetallic sulfide core of Co6Ni3S8 using Co-Ni-alginate biomass are introduced. The obtained Co6Ni3S8/carbon aerogels (Co6Ni3S8/NSCA) exhibit excellent sodium-ion storage properties, high reversible capacity (568.1 mAh g−1 at 1 A g−1), and an excellent cycle stability (94.4% after 300 cycles). Density functional theory ...
    View more >
    Recently, the metal sulfide-carbon nanocomposites have been suggested as a low-cost alternative to lithium ion batteries, but commercial application is seriously hindered by their relatively inferior cyclic performance. Herein, N and S vacancies in an N,S co-doped carbon (NSC) shell for anchoring a new bimetallic sulfide core of Co6Ni3S8 using Co-Ni-alginate biomass are introduced. The obtained Co6Ni3S8/carbon aerogels (Co6Ni3S8/NSCA) exhibit excellent sodium-ion storage properties, high reversible capacity (568.1 mAh g−1 at 1 A g−1), and an excellent cycle stability (94.4% after 300 cycles). Density functional theory calculation results disclose that nitrogen and sulfur vacancies in the carbon shell can enhance the binding between the Co6Ni3S8 core and NSC shell, ensuring an improved structural and electrochemical stability. In addition, an increased adsorption energy of Na+ (−1.88 eV) and a decreased barrier energy for Na+ diffusion (0.46 eV) are observed indicating a fast Na+ diffusion process. The powder X-ray diffraction refinement confirms that the lattice parameters of Co6Ni3S8 extend to 0.9972 nm compared with Co9S8 (0.9928 nm), suppressing the volume expansion in Na+ diffusion processes.
    View less >
    Journal Title
    Advanced Energy Materials
    Volume
    10
    Issue
    18
    DOI
    https://doi.org/10.1002/aenm.201904147
    Subject
    Macromolecular and Materials Chemistry
    Materials Engineering
    Interdisciplinary Engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Energy & Fuels
    Publication URI
    http://hdl.handle.net/10072/401836
    Collection
    • Journal articles

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander