WX2(X = S, Se) Single Crystals: A Highly Stable Material for Supercapacitor Applications

被引：47

作者：

Habib, Muhammad ^{[1
]}

Khalil, Adnan ^{[1
]}

Muhammad, Zahir ^{[1
]}

Khan, Rashid ^{[1
]}

Wang, Changda ^{[1
]}

Rehman, Zia Ur ^{[1
]}

Masood, Hafiz Tariq ^{[2
]}

Xu, Weiyu ^{[1
]}

Liu, Hengjie ^{[1
]}

Gan, Wei ^{[1
]}

Wu, Chuanqiang ^{[1
]}

Chen, Haiping ^{[1
]}

Song, Li ^{[1
]}

机构：

[1] Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2017年 / 258卷

关键词：

Tungsten disulfide; Tungsten diselenide; Chemical vapor transport; Electrochemistry; Supercapacitors; TRANSITION-METAL DICHALCOGENIDES; HIGH-PERFORMANCE SUPERCAPACITORS; COBALT SULFIDE NANOTUBES; FLEXIBLE ELECTRODES; TRANSPORT REACTIONS; MOS2; GRAPHENE; WS2; CONVERSION; NANOSHEETS;

D O I：

10.1016/j.electacta.2017.10.083

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We present high quality WX2 (X = S, Se) single crystals synthesized via an improved chemical vapor transport technique. Morphological and structural characteristics of the as-grown layered single crystals were analyzed using SEM, TEM, XPS, Raman spectroscopy, XRD and UV visible spectroscopy characterization techniques. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge-discharge analysis reveal the insights for WX2 single crystals to be used an as excellent material for electrochemical supercapacitors. Notably the obtained supercapacitor electrodes show excellent cycle stability and high capacitance retention of 80 and 99% for WS2 and WSe2 respectively after 20,000 cycles, suggesting their high potential in electrochemical energy storage applications. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：71 / 79

页数：9

共 47 条

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[2] 2H → 1T phase transition and hydrogen evolution activity of MoS2, MoSe2, WS2 and WSe2 strongly depends on the MX2 composition [J].