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    Amorphous V–O–C composite nanofibers electrospun from solution precursors as binder- and conductive additive-free electrodes for supercapacitors with outstanding performance

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    Authors
    Chen, Xia
    Zhao, Bote
    Cai, Yong
    Tade, Moses
    Shao, Zongping
    Date
    2013
    Type
    Journal Article
    
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    Citation
    Chen, Xia and Zhao, Bote and Cai, Yong and Tade, Moses and Shao, Zongping. 2013. Amorphous V–O–C composite nanofibers electrospun from solution precursors as binder- and conductive additive-free electrodes for supercapacitors with outstanding performance. Nanoscale. 5: pp. 12589-12597.
    Source Title
    Nanoscale
    DOI
    10.1039/c3nr04484j
    ISSN
    2040-3364
    URI
    http://hdl.handle.net/20.500.11937/40205
    Collection
    • Curtin Research Publications
    Abstract

    Flexible V–O–C composite nanofibers were fabricated from solution precursors via electrospinning and were investigated as free-standing and additive-free film electrodes for supercapacitors. Specifically, composite nanofibers (V0, V5, V10 and V20) with different vanadyl acetylacetonate (VO(acac)2) contents of 0, 5, 10 and 20 wt% with respect to polyacrylonitrile (PAN) were prepared. The composite nanofibers were comparatively studied using XRD, Raman spectroscopy, XPS, N2 adsorption–desorption, FE-SEM, TEM and S-TEM. The vanadium element was found to be well-dispersed in the carbon nanofibers, free from the formation of an aggregated crystalline phase, even in the case of V20. A specific surface area of 587.9 m2 g-1 was reached for V10 after calcination, which is approximately twice that of the vanadium-free carbon nanofibers (V0, 300.9 m2 g-1). To perform as an electrode for supercapacitors in an aqueous electrolyte, the V10 film delivered a specific capacitance of 463 F g-1 at 1 A g-1. V10 was also able to retain a specific capacitance of 380 F g-1, even at a current density of 10 A g-1. Additionally, very stable cycling stability was achieved, maintaining an outstanding specific capacitance of 400 F g-1 at 5 A g-1 after charge–discharge cycling 5000 times. Thus, V–O–C composite nanofibers are highly attractive electrode materials for flexible, high-power, thin film energy storage devices and applications.

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