Issue 1, 2018

Nitrogen-doped carbon nanotube supported double-shelled hollow composites for asymmetric supercapacitors

Abstract

In this work, a unique N–C@NiMoO4 composite with a double-shelled hollow microtube structure has been developed through a simple and low-cost growth process. The composite contains a NiMoO4 outer shell with high electrochemical activity and hollow nitrogen-doped carbon nanotubes (N–C NTs) with high conductivity, resulting in a high performance electrode material. The existence of N–C NTs effectively prevents the accumulation and agglomeration of the NiMoO4 nanosheets during the formation of a uniform outer shell, providing a higher specific surface area (258.2 m2 g−1). The electrochemical study displays that the C@NiMoO4 composite has a specific capacitance as high as 1242 F g−1 at a current density of 1 A g−1, and about 82.9% cycling stability after 2000 cycles. Moreover, the as-fabricated C@NiMoO4//N–C asymmetric supercapacitor (ASC) can achieve a maximum high energy density of 44.6 W h kg−1 at a power density of 250.4 W kg−1. These results imply that the C@NiMoO4 composite with a double-shelled hollow tube-structure is a promising candidate for high performance supercapacitors.

Graphical abstract: Nitrogen-doped carbon nanotube supported double-shelled hollow composites for asymmetric supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
09 Sep 2017
Accepted
19 Nov 2017
First published
20 Nov 2017

New J. Chem., 2018,42, 150-160

Nitrogen-doped carbon nanotube supported double-shelled hollow composites for asymmetric supercapacitors

Y. Zheng, J. Xu, Y. Zhang, X. Yang, Y. Zhang and Y. Shang, New J. Chem., 2018, 42, 150 DOI: 10.1039/C7NJ03422A

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