Hierarchical Design of CuO/Nickel-Cobalt-Sulfide Electrode by a Facile Two-Step Potentiostatic Deposition

Herein, a scalable electrodeposition strategy is proposed to achieve hierarchical CuO/nickel-cobalt-sulfide (NCS) electrodes using two-step potentiostatic deposition followed by high-temperature calcination. The introduction of CuO provides support for the further deposition of NSC to ensure a high...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-04, Vol.14 (4), p.888
Main Authors: Lv, Sa, Geng, Peiyu, Chi, Yaodan, Wang, Huan, Chu, Xuefeng, Zhao, Yang, Wu, Boqi, Shang, Wenshi, Wang, Chao, Yang, Jia, Cheng, Zhifei, Yang, Xiaotian
Format: Article
Language:English
Subjects:
Carbon
Design
Electrochemical reactions
electrode material
Electrode materials
Electrodeposition
Electrodes
Electrolytes
Electron transport
Energy storage
High temperature
nanosheet
Nickel
potentiostatic deposition
Scanning electron microscopy
Spectrum analysis
Sulfides
transition metal sulfides
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Summary:Herein, a scalable electrodeposition strategy is proposed to achieve hierarchical CuO/nickel-cobalt-sulfide (NCS) electrodes using two-step potentiostatic deposition followed by high-temperature calcination. The introduction of CuO provides support for the further deposition of NSC to ensure a high load of active electrode materials, thus generating more abundant active electrochemical sites. Meanwhile, dense deposited NSC nanosheets are connected to each other to form many chambers. Such a hierarchical electrode prompts a smooth and orderly transmission channel for electron transport, and reserves space for possible volume expansion during the electrochemical test process. As a result, the CuO/NCS electrode exhibits superior specific capacitance ( s) of 4.26 F cm at 20 mA cm and remarkable coulombic efficiency of 96.37%. Furthermore, the cycle stability of the CuO/NCS electrode remains at 83.05% within 5000 cycles. The multistep electrodeposition strategy provides a basis and reference for the rational design of hierarchical electrodes to be applied in the field of energy storage.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14040888