NDLI: Synthesis of few-layer 1T′-MoTe<sub>2</sub> ultrathin nanosheets for high-performance pseudocapacitors

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Junxue Liu, Ming Li, Yanpeng Du, Jiao Wang, Zhaojie Wei, Guijuan An, Changhua Zhang, Jun
Copyright Year	2017
Abstract	The synthesis of layered transition metal dichalcogenide nanocrystals with excellent properties in energy conversion and storage has been well documented in the past several years. However, due to the metallic character of Te, the realization of the chemical synthesis of uniform well-defined MoTe2 nanostructures still remains a challenge, especially to achieve metastable 1T′-MoTe2. In this work, we have developed a colloidal chemical strategy for the synthesis of ultrathin 1T′-MoTe2 nanosheets. The as-achieved sample was characterized by a layered-expanded feature with an interlayer distance of 0.723 nm and rich defects. The shapes of 1T′-MoTe2 can be controlled by varying Mo precursors and the reaction atmosphere, where CO plays an essential role in determining the nanosheet feature. Interestingly, the optimized few-layer 1T′-MoTe2 nanosheets can be used as an efficient supercapacitor electrode with specific capacitances of 1393 F g−1 and 714 F g−1 at current densities of 1 A g−1 and 100 A g−1, respectively. An asymmetric 1T′-MoTe2//activated carbon supercapacitor exhibits a maximum specific capacitance of 158.9 F g−1 with an energy density up to 56.4 W h kg−1. To the best of our knowledge, it is the first time that ultrathin MoTe2 nanosheets have been used as ideal electrode materials for supercapacitors. The present work highlights a facile synthetic strategy to realize uniform transition metal telluride nanostructures for enhancing their electrochemical performances.
Starting Page	1035
Ending Page	1042
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	3
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta08206h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	CO Mo Chalcogenide Metastability Nanosheet Supercapacitor Electrode Activated carbon Capacitance Energy density Transition metal Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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