Cited by 125Supercapacitor Materials and FabricationElectrocatalysts for Energy ConversionCarbon Nanotubes in Composites

Vertically Aligned Carbon Nanotubes on Carbon Nanofibers: A Hierarchical Three-Dimensional Carbon Nanostructure for High-Energy Flexible Supercapacitors

Qiu, Yongcai, Li, Guizhu, Hou, Yuan, Pan, Zhenghui, Li, Hongfei, Li, Wanfei, Liu, Meinan, Ye, Fangmin +2 more·2015·Chemistry of Materials

Abstract

Hierarchical structures enable high-performance power sources. We report here the preparation of vertically aligned carbon nanotubes directly grown on carbon nanofibers (VACNTs/CNFs) by combining electrospinning with pyrolysis technologies. The structure and morphology of VACNTs/CNFs could be precisely tuned and controlled by adjusting the percentage of reactants. The desired VACNTs/CNFs could not only possess high electric conductivity for efficient charge transport but could also increase surface area for accessing more electrolyte ions. When using an ionic liquid electrolyte, VACNTs/CNFs-based electric double layer (EDL) flexible supercapacitors can deliver a high specific energy of 70.7 Wh/kg at a current density of 0.5 A/g and at 30 °C, and an ultrahigh-energy density of 98.8 Wh/kg at a current density of 1.0 A/g and at 60 °C. Even after 20 000 charging/discharging cycles, the EDL capacitor still retains 97.0% of the initial capacitance. The excellent performance highlights the important role of the branched VACNTs in storing and accumulating charge and the CNF backbone in transporting charge, thereby boosting both power density and energy density.

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Crossref · 10.1021/cm503784x

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  • Wearable supercapacitor materials possess low gravimetric and volumetric energy densities.

    “These materials have shown fast charge and discharge capacity, but also possess low gravimetric and volumetric energy densities180-182.”

    From Wearable biosensors for healthcare monitoring (2019) · cites this paper as [180]

  • Wearable supercapacitor materials have shown fast charge and discharge capacity.

    “These materials have shown fast charge and discharge capacity, but also possess low gravimetric and volumetric energy densities180-182.”

    From Wearable biosensors for healthcare monitoring (2019) · cites this paper as [180]

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Authors
Qiu, Y., Li, G., Hou, Y., Pan, Z., Li, H., Li, W., Liu, M., Ye, F., Yang, X., & Zhang, Y.
Affiliations
Chinese Academy of Sciences (CN)
Corresponding author
  • Yang, Xiaowei
  • Zhang, Yuegang
Venue
Chemistry of Materials
Published
2015-01-13
Volume
27
Issue
4
Pages
1194-1200
ISSN
  • 0897-4756 (ISSN-L)
  • 1520-5002
OpenAlex
W2333860075
Cited by
125
References
42
Citations by year
2026: 5 · 2025: 2 · 2024: 7 · 2023: 9 · 2022: 8 · 2021: 9 · 2020: 16 · 2019: 15 · 2018: 13 · 2017: 13 · 2016: 22 · 2015: 6
FWCI
4.61
Type
journal article
Language
en
Open access
closed
Locations
Chemistry of Materials (publishedVersion)
Funders
  • China Postdoctoral Science Foundation (2014M550314)
  • National Natural Science Foundation of China (1403287, 21303251, 21433013)
  • National Natural Science Foundation of Jiangsu Province (BK20140383)
  • Science and Technology Development Program of Suzhou City (ZXG2013002)
Topics
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Supercapacitor Materials and Fabrication
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
Keywords
vertically aligned carbon nanotubes, carbon nanofibers, flexible supercapacitors, electric double-layer capacitors, ionic liquid electrolyte, electrospinning, pyrolysis, specific energy density, cycling stability, charge transport, surface area

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