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Porous ultrathin carbon nanobubbles formed carbon nanofiber webs for high-performance flexible supercapacitors

Abstract

Developing novel and scalable high-performance carbon nanomaterials and nanostructures is of critical importance for practical applications of flexible supercapacitors. In this work, we report a unique kind of all-carbon nanofibrous nonwoven webs, in which carbon nanofibers are formed by well-connected porous ultrathin carbon nanobubbles. The foamed porous structures are achieved using ethanol as a carbon source coating on electrospun ZnO nanofiber template followed by removing the ZnO template via a reduction and evaporation process. As a candidate for flexible supercapacitor applications, the fabricated integrated carbon nanofiber webs exhibit a long cycling life of 94.1% capacitance retention even after 35,000 cycles at the current density of 10 A g−1 under three-electrode configuration. The symmetric supercapacitors also show a high rate performance of 81.4% capacitance retention when the current density is increased 70 times from 0.5 to 35 A g−1. Furthermore, electrochemical testing of the flexible symmetric devices display almost the same capacitive behavior under different bending states. These excellent electrochemical performances are attributed to the interconnected porous and bubbled structures of the carbon nanofiber webs.

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Publication details

The article was received on 20 Apr 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA03445H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Porous ultrathin carbon nanobubbles formed carbon nanofiber webs for high-performance flexible supercapacitors

    L. Wang, G. Zhang, X. Zhang, H. Shi, W. Zeng, H. Zhang, Q. Liu, C. Li, Q. Liu and H. Duan, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA03445H

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