期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 616, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126334
关键词
Supercapacitors; Bimetallic sulfide; Capacitance; Nanorod
资金
- National Natural Science Foundation of China [21878192]
The research focuses on bimetallic sulfide as electrode materials for supercapacitors, with NiCo2S4 nanorod arrays showing excellent electrochemical performance. The material's unique structure contributes to high specific capacitance and energy density in supercapacitor applications.
Currently, the research of bimetallic sulfide as electrode materials for supercapacitors has been intensely concerned. Herein, a feasible hydrothermal method has been proposed to fabricate NiCo2S4 nanorod arrays on Ni foam (NiCo2S4/NF). The distinct structure of the material with nanorods as trunk and nanowires as branches can be achieved by precisely controlling the sulfidation time. By virtue of the rough surface and such hierarchical structure, the as-prepared NiCo2S4/NF electrode exhibits excellent electrochemical performance with specific capacitance of 3093 F g-1 (343.7 mA h g-1) at the current density of 5 A g-1 and 2130 F g-1 (236.7 mA h g-1) at the current density of 30 A g-1. When NiCo2S4/NF is used as the positive electrode, the assembled asymmetric supercapacitor device shows a high energy density of 39.3 Wh kg-1 at a power density of 800 W kg-1, and an energy density of 32.5 Wh kg-1 can be maintained at a power density as high as 3199.8 W kg-1.
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