In:
Angewandte Chemie, Wiley, Vol. 128, No. 19 ( 2016-05-04), p. 5827-5832
Abstract:
As the properties of ultrathin two‐dimensional (2D) crystals are strongly related to their electronic structures, more and more attempts were carried out to tune their electronic structures to meet the high standards for the construction of next‐generation smart electronics. Herein, for the first time, we show that the conductive nature of layered ternary chalcogenide with formula of Cu 2 WS 4 can be switched from semiconducting to metallic by hydrogen incorporation, accompanied by a high increase in electrical conductivity. In detail, the room‐temperature electrical conductivity of hydrogenated‐Cu 2 WS 4 nanosheet film was almost 10 10 times higher than that of pristine bulk sample with a value of about 2.9×10 4 S m −1 , which is among the best values for conductive 2D nanosheets. In addition, the metallicity in the hydrogenated‐Cu 2 WS 4 is robust and can be retained under high‐temperature treatment. The fabricated all‐solid‐state flexible supercapacitor based on the hydrogenated‐Cu 2 WS 4 nanosheet film shows promising electrochemical performances with capacitance of 583.3 F cm −3 at a current density of 0.31 A cm −3 . This work not only offers a prototype material for the study of electronic structure regulation in 2D crystals, but also paves the way in searching for highly conductive electrodes.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v128.19
DOI:
10.1002/ange.201600029
Language:
English
Publisher:
Wiley
Publication Date:
2016
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