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

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhao, Bote Cai, Yong Tadé, Moses O. Chen, Xia Shao, Zongping
Copyright Year	2013
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.
Starting Page	12589
Ending Page	12597
Page Count	9
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	5
Issue Number	24
Journal	Nanoscale
DOI	10.1039/c3nr04484j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Polyacrylonitrile Electrode Vanadium Electrospinning Specific surface area Calcination Raman spectroscopy Carbon V10 engine X-ray crystallography Transmission electron microscopy Electrolyte Vanadyl acetylacetonate Capacitance Raman Electric current
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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