Large-Scale Production of Large-Size Atomically Thin Semiconducting Molybdenum Dichalcogenide Sheets in Water and Its Application for Supercapacitor

To progress from laboratory research to commercial applications, it is necessary to develop an effective method to prepare large quantities and high-quality of the large-size atomically thin molybdenum dichalcogenides (MoS 2 ). Aqueous-phase processes provide a viable method for producing thin MoS 2...

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Veröffentlicht in:Scientific reports 2016-05, Vol.6 (1), p.26660-26660, Article 26660
Hauptverfasser: Chen, Yu-Xiang, Wu, Chien-Wei, Kuo, Ting-Yang, Chang, Yu-Lung, Jen, Ming-Hsing, Chen, I-Wen Peter
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container_title Scientific reports
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Wu, Chien-Wei
Kuo, Ting-Yang
Chang, Yu-Lung
Jen, Ming-Hsing
Chen, I-Wen Peter
description To progress from laboratory research to commercial applications, it is necessary to develop an effective method to prepare large quantities and high-quality of the large-size atomically thin molybdenum dichalcogenides (MoS 2 ). Aqueous-phase processes provide a viable method for producing thin MoS 2 sheets using organolithium-assisted exfoliation; unfortunately, this method is hindered by changing pristine semiconducting 2H phase to distorted metallic 1T phase. Recovery of the intrinsic 2H phase typically involves heating of the 1T MoS 2 sheets on solid substrates at high temperature. This has restricted and hindered the utilization of 2H phase MoS 2 sheets suspensions. Here, we demonstrate that the synergistic effect of the rigid planar structure and charged nature of organic salt such as imidazole (ImH) can be successfully used to produce atomically thin 2H-MoS 2 sheets suspension in water. Moreover, lateral size and area of the exfoliated sheet can be up to 50 μm and 1000 μm 2 , respectively. According to the XPS measurements, nearly 100% of the 2H-MoS 2 sheets was successfully prepared. A composite paper supercapacitor using the exfoliated 2H-MoS 2 and carbon nanotubes delivered a superior volumetric capacitance of ~410 F/cm 3 . Therefore, the organic salts-assisted liquid-phase exfoliation has great potential for large-scale production of 2H-MoS 2 suspensions for supercapacitor application.
doi_str_mv 10.1038/srep26660
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Aqueous-phase processes provide a viable method for producing thin MoS 2 sheets using organolithium-assisted exfoliation; unfortunately, this method is hindered by changing pristine semiconducting 2H phase to distorted metallic 1T phase. Recovery of the intrinsic 2H phase typically involves heating of the 1T MoS 2 sheets on solid substrates at high temperature. This has restricted and hindered the utilization of 2H phase MoS 2 sheets suspensions. Here, we demonstrate that the synergistic effect of the rigid planar structure and charged nature of organic salt such as imidazole (ImH) can be successfully used to produce atomically thin 2H-MoS 2 sheets suspension in water. Moreover, lateral size and area of the exfoliated sheet can be up to 50 μm and 1000 μm 2 , respectively. According to the XPS measurements, nearly 100% of the 2H-MoS 2 sheets was successfully prepared. A composite paper supercapacitor using the exfoliated 2H-MoS 2 and carbon nanotubes delivered a superior volumetric capacitance of ~410 F/cm 3 . 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A composite paper supercapacitor using the exfoliated 2H-MoS 2 and carbon nanotubes delivered a superior volumetric capacitance of ~410 F/cm 3 . 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A composite paper supercapacitor using the exfoliated 2H-MoS 2 and carbon nanotubes delivered a superior volumetric capacitance of ~410 F/cm 3 . Therefore, the organic salts-assisted liquid-phase exfoliation has great potential for large-scale production of 2H-MoS 2 suspensions for supercapacitor application.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>27225297</pmid><doi>10.1038/srep26660</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
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subjects 140/146
639/301/357/1018
639/638/298/918
Capacitance
Exfoliation
Humanities and Social Sciences
Imidazole
Molybdenum
multidisciplinary
Nanotubes
Salts
Science
Temperature effects
title Large-Scale Production of Large-Size Atomically Thin Semiconducting Molybdenum Dichalcogenide Sheets in Water and Its Application for Supercapacitor
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