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Issue 67, 2018
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Facile fabrication of hierarchical film composed of Co(OH)2@Carbon nanotube core/sheath nanocables and its capacitive performance

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Abstract

A hierarchical film composed of Co(OH)2@carbon nanotube (CNT) core/sheath nanocables (CCNF) was generated via a simple and rapid electrophoretic deposition method. It is found that the Co(OH)2 sheath was uniformly anchored on the surface of conductive CNT core. The Co(OH)2 sheath, with a thickness of ∼20 nm, was composed of numerous very tiny nanoparticles. Such a unique nanostructure endows the CCNF with a high surface area of 126 m2 g−1 and a hierarchical porosity, resulting in a large accessible surface area for redox activity. As expected, the CCNF exhibits high specific capacitance and excellent rate performance. Its specific capacitance reached 1215 F g−1 under a low current density of 1 A g−1 and was maintained at 832 F g−1 when the current density was increased 20 times to 20 A g−1. A high capacitance retention of 99.3% was achieved after 10 000 cycles at 1 A g−1. Such intriguing capacitive behavior is attributed to the synergistic effect of the CNT core and the Co(OH)2 sheath.

Graphical abstract: Facile fabrication of hierarchical film composed of Co(OH)2@Carbon nanotube core/sheath nanocables and its capacitive performance

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Publication details

The article was received on 22 Aug 2018, accepted on 07 Nov 2018 and first published on 15 Nov 2018


Article type: Paper
DOI: 10.1039/C8RA07031H
Citation: RSC Adv., 2018,8, 38550-38555
  • Open access: Creative Commons BY-NC license
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    Facile fabrication of hierarchical film composed of Co(OH)2@Carbon nanotube core/sheath nanocables and its capacitive performance

    H. Fang, G. Chen, L. Wang, J. Yan, L. Zhang, K. Gao, Y. Zhang and L. Wang, RSC Adv., 2018, 8, 38550
    DOI: 10.1039/C8RA07031H

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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