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In this work, gold nanoparticles (AuNPs) decorated Ti3C2Tx nanosheets (MXene/AuNPs composite) are fabricated through a self-reduction reaction of Ti3C2Tx nanosheets with HAuCl4 aqueous solution. The obtained composite is characterized as AuNPs with the diameter of about 23 nm uniformly dispersing on Ti3C2Tx nanosheets without aggregation. The composite (MXene decorated on 4.8 wt% AuNPs) is further employed to construct supercapacitor for the first time with a higher specific capacitance of 278 F·g-1 at 5 mV·s-1 than that of pure Ti3C2Tx and 95% of cyclic stability after 10,000 cycles. Furthermore, MXene/AuNPs composite symmetric supercapacitor with filter paper as separator and H2SO4 as electrolyte, is assembled. The supercapacitor exhibits a high volumetric energy density of 8.82 Wh·L-1 at a power density of 264.6 W·L-1 and ultrafast-charging/ discharging performance. It exhibits as a promising candidate applied in integrated and flexible supercapacitors.


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In situ reduced MXene/AuNPs composite toward enhanced charging/discharging and specific capacitance

Show Author's information Zixiang ZHENGaWei WUaTao YANGa( )Enhui WANGaZhentao DUbXinmei HOUa( )Tongxiang LIANGcHailong WANGd
Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China
School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
School of Materials Science Engineering, Zhengzhou University, Zhengzhou 450001, China

† Zixiang Zheng and Wei Wu contributed equally to this work.

Abstract

In this work, gold nanoparticles (AuNPs) decorated Ti3C2Tx nanosheets (MXene/AuNPs composite) are fabricated through a self-reduction reaction of Ti3C2Tx nanosheets with HAuCl4 aqueous solution. The obtained composite is characterized as AuNPs with the diameter of about 23 nm uniformly dispersing on Ti3C2Tx nanosheets without aggregation. The composite (MXene decorated on 4.8 wt% AuNPs) is further employed to construct supercapacitor for the first time with a higher specific capacitance of 278 F·g-1 at 5 mV·s-1 than that of pure Ti3C2Tx and 95% of cyclic stability after 10,000 cycles. Furthermore, MXene/AuNPs composite symmetric supercapacitor with filter paper as separator and H2SO4 as electrolyte, is assembled. The supercapacitor exhibits a high volumetric energy density of 8.82 Wh·L-1 at a power density of 264.6 W·L-1 and ultrafast-charging/ discharging performance. It exhibits as a promising candidate applied in integrated and flexible supercapacitors.

Keywords:

supercapacitors, MXene, gold nanoparticles (AuNPs), self-reduction, composite
Received: 04 February 2021 Revised: 28 April 2021 Accepted: 03 May 2021 Published: 16 September 2021 Issue date: October 2021
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Publication history

Received: 04 February 2021
Revised: 28 April 2021
Accepted: 03 May 2021
Published: 16 September 2021
Issue date: October 2021

Copyright

© The Author(s) 2021

Acknowledgements

This work is supported by the National Science Fund for Distinguished Young Scholars (No. 52025041), the National Natural Science Foundation of China (Nos. 51974021, 51902020, and 51904021), the Fundamental Research Funds for the Central Universities (Nos. FRF-TP-18-045A1 and FRF-TP-19-004B2Z), the National Postdoctoral Program for Innovative Talents (No. BX20180034), China Postdoctoral Science Foundation (No. 2018M641192), and the Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University (No. 2021GXYSOF12).

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