Self-supporting S@GO-FWCNTs composite films as positive electrodes for high-performance lithium-sulfur batteries

Lifeng Cui, Yanan Xue, Suguru Noda, Zhongming Chen

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Although lithium-sulfur (Li-S) batteries are a promising secondary power source, it still faces many technical challenges, such as rapid capacity decay and low sulfur utilization. The loading of sulfur and the weight percentage of sulfur in the cathode usually have a significant influence on the energy density. Herein, we report an easy synthesis of a self-supporting sulfur@graphene oxide-few-wall carbon nanotube (S@GO-FWCNT) composite cathode film, wherein an aluminum foil current collector is replaced by FWCNTs and sulfur particles are uniformly wrapped by graphene oxide along with FWCNTs. The 10 wt% FWCNT matrix through ultrasonication not only provided self-supporting properties without the aid of metallic foil, but also increased the electrical conductivity. The resulting S@GO-FWCNT composite electrode showed high rate performance and cycle stability up to ∼385.7 mA h gelectrode -1 after 500 cycles and close to ∼0.04% specific capacity degradation per cycle, which was better than a S@GO composite electrode (353.1 mA h gelectrode -1). This S@GO-FWCNT composite self-supporting film is a promising cathode material for high energy density rechargeable Li-S batteries.

    Original languageEnglish
    Pages (from-to)2260-2266
    Number of pages7
    JournalRSC Advances
    Volume8
    Issue number5
    DOIs
    Publication statusPublished - 2018 Jan 1

    Fingerprint

    Composite films
    Sulfur
    Graphite
    Electrodes
    Oxides
    Graphene
    Carbon Nanotubes
    Carbon nanotubes
    Cathodes
    Composite materials
    Aluminum foil
    Lithium sulfur batteries
    Metal foil
    Degradation

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)

    Cite this

    Self-supporting S@GO-FWCNTs composite films as positive electrodes for high-performance lithium-sulfur batteries. / Cui, Lifeng; Xue, Yanan; Noda, Suguru; Chen, Zhongming.

    In: RSC Advances, Vol. 8, No. 5, 01.01.2018, p. 2260-2266.

    Research output: Contribution to journalArticle

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