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Dopamine Adsorption Precursor Enables N-doped Carbon Sheathing of MoS2 Nanoflowers for All-around Enhancement of Supercapacitor Performance

Authors Cui, Xiao
Chen, Xinli
Chen, Susu
Jia, Fanli
Yang, Shihe View this author's profile
Lin, Zhang
Shi, Zhenqing
Deng, Hong
Issue Date 2017
Source Journal of Alloys and Compounds , v. 693, February 2017, p. 955-963
Summary The application of MoS2 in renewable energy-storage has been hampered by its low conductivity and restacking tendency. In this study, we demonstrate a facile and simple synthesis of MoS2 nanoflowers free from re-stacking and demonstrate that further encapsulating the nanoflowers with a fine N-doped carbon shell enhances conductivity through the self-polymerization of dopamine. This class of nitrogen-doped carbon-encapsulated MoS2 composites (MSCNs) was systematically optimised by adjusting nitrogen-doped carbon ratios. The composite with a mass fraction of approximately 86% MoS2 and approximately 14% carbon content (named MSCN-1) exhibited excellent capacitive performance. In comparison to the specific capacitance of MoS2 (169 F g(-1) at 1 A g(-1) and 85.30% retained capacitance over 6000 cycles), MSCN-1 based electrodes showed improved performance, delivering specific capacitance up to 276 F g(-1) at 1 A g(-1) and 90.59% retained capacitance over 6000 cycles. The significantly enhanced electrochemical performance of MSCN-1 was primarily due to MoS2 and partly due to N-doped carbon. Taken together, these findings provide strong synergistic effects in this condition. (C) 2016 Elsevier B.V. All rights reserved.
ISSN 0925-8388
Language English
Format Article
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