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Three-Dimensional Porous Ti3C2Tx-NiO Composite Electrodes with Enhanced Electrochemical Performance for Supercapacitors

1
Department of Materials Science and Engineering, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
2
Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
3
Key Laboratory of Superlight Materials & Surface Technology (Harbin Engineering University), Ministry of Education, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(1), 188; https://doi.org/10.3390/ma12010188
Received: 5 December 2018 / Revised: 26 December 2018 / Accepted: 28 December 2018 / Published: 8 January 2019
(This article belongs to the Special Issue MAX Phases and MXenes: Synthesis and Applications)
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Abstract

Ti3C2Tx and Ti3C2Tx-NiO composites with three-dimensional (3D) porous networks were successfully fabricated via vacuum freeze-drying. The microstructure, absorption, and electrochemical properties of the developed composites were investigated. Nickel oxide (NiO) nanoparticles could be evenly distributed on the three-dimensional network of three-dimensional Ti3C2Tx using solution processing. When employed as electrochemical capacitor electrodes in 1 M environmentally friendly sodium sulfate, Na2SO4, solution, the three-dimensional porous Ti3C2Tx-NiO composite electrodes exhibited considerable volume specific capacitance as compared to three-dimensional porous Ti3C2Tx. The three-dimensional porous Ti3C2Tx-NiO composite delivered a remarkable cycling performance with a capacitance retention of up to 114% over 2500 cycles. The growth trend of the capacitance with NiO content shows that nickel oxide plays a crucial role in the composite electrodes. These results present a roadmap for the development of convenient and economical supercapacitors in consideration with the possibilities of morphological control and the extensibility of the process. View Full-Text
Keywords: MXene; porous Ti3C2Tx-NiO composite; freeze-drying; electrode; supercapacitor MXene; porous Ti3C2Tx-NiO composite; freeze-drying; electrode; supercapacitor
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Zhang, K.; Ying, G.; Liu, L.; Ma, F.; Su, L.; Zhang, C.; Wu, D.; Wang, X.; Zhou, Y. Three-Dimensional Porous Ti3C2Tx-NiO Composite Electrodes with Enhanced Electrochemical Performance for Supercapacitors. Materials 2019, 12, 188.

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