Facile Route to Achieve a Hierarchical CuO/Nickel-Cobalt-Sulfide Electrode for Energy Storage

Herein, a novel self-supporting CuO/nickel-cobalt-sulfide (NCS) electrode was designed in a two-step electrodeposition technique followed by a calcination process. Three-dimensional copper foam (CF) was exploited as the current collector and spontaneous source for the in situ preparation of the CuO...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-11, Vol.14 (11), p.2095
Main Authors: Lv, Sa, Cheng, Zhifei, Chi, Yaodan, Wang, Huan, Chu, Xuefeng, Zhao, Yang, Wu, Boqi, Wang, Runsheng, Zhang, Zhiwen, Wang, Chao, Yang, Jia, Yang, Xiaotian
Format: Article
Language:English
Subjects:
Capacitance
Cobalt
composite
Computer storage devices
Copper
Copper oxide
Copper oxides
Cuprite
Electrodeposition
Electrodes
Electrolytes
Energy management systems
Energy storage
High temperature
Laws, regulations and rules
Metal foams
Morphology
Nickel
Oxidation
Sulfides
Work stations
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Summary:Herein, a novel self-supporting CuO/nickel-cobalt-sulfide (NCS) electrode was designed in a two-step electrodeposition technique followed by a calcination process. Three-dimensional copper foam (CF) was exploited as the current collector and spontaneous source for the in situ preparation of the CuO nanostructures, which ensured sufficient deposition space for the subsequent NCS layer, thus forming abundant electrochemical active sites. Such a hierarchical structure is conducive to providing a smooth path for promoting electronic transmission. Therefore, the optimized CuO/NCS electrode exhibits outstanding energy storage capability with extremely superior specific capacitance (Cs) of 7.08 F cm−2 at 4 mA cm−2 and coulombic efficiency of up to 94.83%, as well as excellent cycling stability with capacitance retention of 83.33% after 5000 cycles. The results presented in this work extend our horizons to fabricate novel hierarchical structured electrodes applied to energy storage devices.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14112095