Issue 12, 2017, Issue in Progress
From the journal:

RSC Advances

High-purity helical carbon nanotubes with enhanced electrochemical properties for supercapacitors†

Qing Zeng,a   Hanqing Tian,a   Jing Jiang,a   Xiaobo Ji,b   Daojiang Gao*c  and  Chao Wang ORCID logo *a  

* Corresponding authors

a Clean EneElectronicrgy Materials and Engineering Center, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
E-mail: cwang@uestc.edu.cn

b Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

c College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, P. R. China
E-mail: daojianggao@126.com

Abstract

The facile preparation of catalysts for high-purity helical carbon nanotubes (HCNTs) remains an open research problem. A novel catalyst precursor ferrous tartrate (C4H4O6Fe) obtained by one-step chemical synthesis is investigated in this study. The influence of reaction temperature on the morphology of the precursor's decomposition products under H2 is analyzed while Fe particles with a macroporous structure are obtained. HCNTs with a coil diameter and coil pitch of about 0.26 μm and 0.28 μm are achieved using C4H4O6Fe as catalyst precursor at 550 °C. Interestingly, Fe particles with different crystal faces were observed. In addition, electrochemical double-layer capacitors (EDLCs) utilizing HCNTs obtained at 550 °C as electrode materials are assembled exhibiting an enhanced specific capacitance of 95 F g−1 after acid treatment at 0.1 A g−1 in Na2SO4.

Graphical abstract: High-purity helical carbon nanotubes with enhanced electrochemical properties for supercapacitors

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Article information

DOI
https://doi.org/10.1039/C6RA27459E
Article type
Paper
Submitted
28 Nov 2016
Accepted
17 Jan 2017
First published
23 Jan 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 7375-7381

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High-purity helical carbon nanotubes with enhanced electrochemical properties for supercapacitors

Q. Zeng, H. Tian, J. Jiang, X. Ji, D. Gao and C. Wang, RSC Adv., 2017, 7, 7375 DOI: 10.1039/C6RA27459E

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