Nanoporous CuS nano-hollow spheres as advanced material for high-performance supercapacitors

被引:135
作者
Heydari, Hamid [1 ]
Moosavifard, Seyyed Ebrahim [2 ]
Elyasi, Saeed [3 ]
Shahraki, Mohammad [4 ]
机构
[1] Razi Univ, Fac Sci, Kermanshah, Iran
[2] Islamic Azad Univ, Cent Tehran Branch, Young Researchers & Elite Club, Tehran, Iran
[3] Sharif Univ Technol, Dept Chem Engn, Tehran, Iran
[4] Univ Sistan & Baluchestan, Dept Chem, Zahedan, Iran
关键词
Nanoporous; Hollow spheres; CuS; Supercapacitor; FACILE SYNTHESIS; SOLVOTHERMAL SYNTHESIS; POLYOL SYNTHESIS; ARRAYS; NANOCOMPOSITES; ELECTRODES; MICROSPHERES; NANONEEDLES; COMPOSITES; HYBRID;
D O I
10.1016/j.apsusc.2016.10.138
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Due to unique advantages, the development of high-performance supercapacitors has stimulated a great deal of scientific research over the past decade. The electrochemical performance of a supercapacitor is strongly affected by the surface and structural properties of its electrode materials. Herein, we report a facile synthesis of high-performance supercapacitor electrode material based on CuS nano-hollow spheres with nanoporous structures, large specific surface area (97 m(2) g(-1)) and nanoscale shell thickness (<20 nm). This interesting electrode structure plays a key role in providing more active sites for electrochemical reactions, short ion and electron diffusion pathways and facilitated ion transport. The CuS nano-hollow spheres electrode exhibits excellent electrochemical performance including a maximum specific capacitance of 948 F g(-1) at 1 A g(-1), significant rate capability of 46% capacitance retention at a high current density of 50 A g(-1), and outstanding long-term cycling stability at various current densities. This work not only demonstrates the promising potential of the CuS-NHS electrodes for application in high-performance supercapacitors, but also sheds a new light on the metal sulfides design philosophy. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:425 / 430
页数:6
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