Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti3C2Tx paper

Si Chen; Xuejiao Zhou; Xinzhi Ma; Lu Li; Panpan Sun; Mingyi Zhang

doi:10.1039/C9RA06393E

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Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti₃C₂T_x paper†

Si Chen,^a Xuejiao Zhou,^a Xinzhi Ma,^a Lu Li,^a Panpan Sun^b and Mingyi Zhang

*^a

Author affiliations

* Corresponding authors

^a Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China
E-mail: zhangmingyi@hrbnu.edu.cn, mysci@foxmail.com

^b College of Materials and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Collaborative Innovation Center for Energy Equipment of Three Gorges Region, China Three Gorges University, Yichang 443002, China

Abstract

Here we describe an aqueous asymmetric supercapacitor assembled using Co(OH)F nanorods on Ni foam (Co(OH)F@NF) as the positive electrode and layered Ti₃C₂T_x paper on Ni foam (Ti₃C₂T_x@NF) as the negative electrode. The Co(OH)F@NF was fabricated by a facile hydrothermal process. The nanorods were constructed as three-dimensional networks with stable structures and good durability in electrochemical reactions. As expected, the Co(OH)F@NF exhibited excellent capacitance (1265 mF cm⁻² at 1 mA cm⁻²) and wonderful rate performance (90% from 1 to 10 mA cm⁻²). The Co(OH)F@NF//Ti₃C₂T_x@NF asymmetric supercapacitor devices showed high capacitance of 376 mF cm⁻² and excellent rate capacity of 91% retention. When the two Co(OH)F@NF//Ti₃C₂T_x@NF devices were combined in series, a red led bulb could be lit for 12 minutes, further corroborating the possibility of the devices being used for practical applications.

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Article information

DOI: https://doi.org/10.1039/C9RA06393E
Article type: Paper
Submitted: 15 Aug 2019
Accepted: 18 Sep 2019
First published: 30 Sep 2019
This article is Open Access

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RSC Adv., 2019,9, 30957-30963

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Asymmetric supercapacitors with excellent rate performance by integrating Co(OH)F nanorods and layered Ti₃C₂T_x paper

S. Chen, X. Zhou, X. Ma, L. Li, P. Sun and M. Zhang, RSC Adv., 2019, 9, 30957 DOI: 10.1039/C9RA06393E

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