Improved pseudocapacitances of supercapacitors based on electrodes of nitrogen-doped Ti3C2Tx nanosheets with in-situ growth of carbon nanotubes



Sun, Yi, Yi, Ruowei, Zhao, Yinchao, Liu, Chenguang, Yuan, Yudan, Geng, Xianwei, Li, Weixuan, Feng, Zhichen, Mitrovic, Ivona ORCID: 0000-0003-4816-8905, Yang, Li ORCID: 0000-0002-1040-4223
et al (show 1 more authors) (2021) Improved pseudocapacitances of supercapacitors based on electrodes of nitrogen-doped Ti3C2Tx nanosheets with in-situ growth of carbon nanotubes. Journal of Alloys and Compounds, 859. p. 158347.

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Abstract

A facile strategy involving only liquid mixing, drying, and annealing processes has been designed to fabricate a new MXene-based material containing nitrogen-doped carbon nanotubes grown on the nitrogen-modified titanium carbides (NCMX). During the thermal treatment, the nitrogen doping is dually achieved in MXene nanosheets and carbon nanotubes while the in-situ growth of carbon nanotubes occurs. The NCMX electrode exhibits the well-designed structure with the promoted specific surface area and specific capacitance. More attractively, the resultant NCMX-4 material shows extraordinary improved electrochemical capacitances of 299.52 F g−1 at the scan rate of 2 mV s−1 in the 3 M H2SO4 electrolyte, which is remarkably more superior than those of the pure un-doped one (74.98 F g−1). It delivers an excellent capacitance retention capability of 84.2% after 10,000 cycles. Our results highlight that the strategy of fabricating novel NCMX materials here can be readily applied to a large industrial scale for improving the pseudocapacitance of supercapacitors.

Item Type: Article
Uncontrolled Keywords: Two-dimensional titanium carbide, Nitrogen doping, Carbon nanotubes, Pseudocapacitances
Depositing User: Symplectic Admin
Date Deposited: 12 Jan 2021 11:18
Last Modified: 18 Jan 2023 23:05
DOI: 10.1016/j.jallcom.2020.158347
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3111128