Synthesis of copper sulfide nanowire arrays for high-performance supercapacitors

被引：166

作者：

Hsu, Yu-Kuei ^{[1
]}

Chen, Ying-Chu ^{[2
]}

Lin, Yan-Gu ^{[3
]}

机构：

[1] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan

[2] Karlsruhe Inst Technol, Inst Anorgan Chem, D-76131 Karlsruhe, Germany

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

ELECTROCHIMICA ACTA | 2014年 / 139卷

关键词：

Copper sulfide; Nanowires; Chemical synthesis; Electrochemical; Supercapacitor; COUNTER ELECTRODE; THIN-FILMS; CUS; STABILITY; CATHODE;

D O I：

10.1016/j.electacta.2014.06.138

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A copper sulfide (CuS) nanowire (NW) array with a hierarchical nanoarchitecture is directly fabricated on copper foil using a simple and cost-effective liquid-solid reaction. The morphology and microstructure of CuS NW arrays are systematically investigated by scanning electron microscopy, X-ray diffraction spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Electrochemical results obtained at various polarization cut-offs and scan rates reveal that the CuS NW array shows highly reversible features and favorable rate abilities. Most importantly, the excellent specific capacitance that is achieved in CuS NW nanoelectrodes is as high as 305 F g(-1), which is one of the high value reported CuS-based pseudocapacitors. An energy density of 70.8 Wh kg(-1) is obtained at a current density of 2 mA cm(-2). The CuS NW nanoelectrode has superior cycling stability with 87% retention of initial specific capacitance after 5000 cycles. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：401 / 407

页数：7

共 24 条

[1] Novel Iron Oxyhydroxide Lepidocrocite Nanosheet as Ultrahigh Power Density Anode Material for Asymmetric Supercapacitors [J].