Electro-deposition of CoNi2S4 flower-like nanosheets on 3D hierarchically porous nickel skeletons with high electrochemical capacitive performance

Ternary cobalt nickel sulfide (CoNi 2 S 4 ) flower-like nanosheets are directly grown on three dimensional (3D) hierarchically porous nickel skeletons by one-step electro-deposition. The resultant 3D porous Ni/CoNi 2 S 4 composites could serve as binder-free integrated electrodes for supercapacitors...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-11, Vol.3 (45), p.2335-2341
Main Authors: Wang, Tao, Zhao, Bo, Jiang, Hong, Yang, Hai-Peng, Zhang, Kai, Yuen, Matthew M. F, Fu, Xian-Zhu, Sun, Rong, Wong, Ching-Ping
Format: Article
Language:English
Subjects:
Electrodes
Foams
Nanostructure
Networks
Nickel
Renewable energy
Resultants
Sulfides
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Summary:Ternary cobalt nickel sulfide (CoNi 2 S 4 ) flower-like nanosheets are directly grown on three dimensional (3D) hierarchically porous nickel skeletons by one-step electro-deposition. The resultant 3D porous Ni/CoNi 2 S 4 composites could serve as binder-free integrated electrodes for supercapacitors, which exhibit higher capacitance than those of 3D porous Ni/Co 9 S 8 , 3D porous Ni/Ni 3 S 2 , Ni foam/CoNi 2 S 4 and smooth Ni/CoNi 2 S 4 electrodes. Furthermore, the 3D porous Ni/CoNi 2 S 4 electrodes demonstrate better electrochemical reversibility and excellent rate capability. The super electrochemical capacitive behavior might be attributed to the highly interconnected conductive networks of 3D hierarchically porous Ni scaffold supported CoNi 2 S 4 flower-like nanosheets with a large specific area and highly active sites. Electro-deposited CoNi 2 S 4 nanosheets on 3D hierarchically porous nickel skeletons demonstrate excellent electrochemical capacitive performance.
ISSN:2050-7488
2050-7496
DOI:10.1039/c5ta04705f