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NiCo2S4 nanosheet/Co9S8 hollow nanoparticle derived from MOF hierarchical core/shell electrode material for supercapacitor applications
被引:9
作者:
Lemu, Girma Beka
[1
,2
]
Liu, Weihua
[1
]
Li, Xin
[1
]
机构:
[1] Xi An Jiao Tong Univ, Sch Microelect, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China
[2] Dire Dawa Univ, Dire Dawa Inst Technol, Sch Elect & Comp Engn, Dire Dawa 1362, Ethiopia
基金:
中国博士后科学基金;
关键词:
COBALT SULFIDE;
GRAPHENE;
CAPACITOR;
NANOSTRUCTURES;
COMPOSITES;
FRAMEWORKS;
DESIGN;
OXIDE;
D O I:
10.1007/s10853-023-09187-8
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Hierarchically engineered three-dimensional (3D) nanostructures are interesting materials for supercapacitors application due to their excellent accessible active sites, and enhanced mass transport and diffusion. However, the design of robust 3D hierarchical core/shell nanostructures with good electrical conductivity and large accessible active site is still challenging. Herein, a 3D honeycomb-like NiCo2S4 nanosheet/Co9S8 hollow derived from metal-organic framework (MOF) hierarchical core/shell electrode material for supercapacitor application is reported. The synthesized 3D hierarchical core/shell structure endowed open diffusion channels and good active sites. This hierarchical core/shell structure exhibits a high areal-specific capacitance of 13.04 F cm(-2) at current density of 10 mA cm(-2); excellent rate performance of 77% as current density increased from 5 to 80 mA cm(-2); and an excellent cycle stability of 94% after 6000 cycles of charge-discharge. Furthermore, the asymmetric electrode device made of NF/NCS/HCS//rGO showed an excellent energy density of 36.9 Wh kg(-1) at a power density of 800 W kg(-1). Such impressive results suggest promising applications of MOF-derived hierarchical structures for design of advanced energy storage devices.
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页码:188 / 205
页数:18
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