In-situ Ni-doped V-MOF ultra-thin nanosheet arrays on Ni foam for high-performance hybrid supercapacitors

被引:3
|
作者
Xie, Yanqiu [1 ]
Zhang, Haopeng [1 ]
Zhang, Kai [1 ]
Liu, Rongrong [1 ]
Sun, Yijia [1 ]
Gao, Xin [1 ]
Bai, He [1 ]
Yao, Fei [2 ]
Yue, Hongyan [1 ]
机构
[1] Harbin Univ Sci & Technol, Sch Mat Sci & Chem Engn, Harbin 150040, Peoples R China
[2] Univ Buffalo, Dept Mat Design & Innovat, North Campus, Buffalo, NY 14260 USA
关键词
VNi-MOF; Nanosheet arrays; Solvothermal method; Hybrid supercapacitors; METAL-ORGANIC-FRAMEWORKS; COBALT SULFIDE; COMPOSITE;
D O I
10.1016/j.electacta.2024.143784
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Bimetallic organic frameworks possess distinctive structural and component benefits that make them essential materials for energy storage devices with outstanding capabilities. Here, ultra-thin 2D VNi-MOF nanosheet arrays (NSAs) have been in-situ grown on nickel foam (NF) which served as both the current collector and the Ni source by pretreatment and one-step solvothermal method and used as an efficient electrode material for high performance supercapacitors. Benefiting from its ultra-thin 2D NSAs structure and the synergy of bimetallic ions, the VNi-MOF NSAs/NF exhibits a high specific capacity performance (516.5 C g-1 at 1 A g-1) and outstanding cycling stability (85.6 % capacity retention over 12, 000 cycles at 20 Ag- 1). Battery-type VNi-MOF NSAs/NF and capacitive-type AC are integrated to assemble a HSC. The prototype HSC achieves a remarkably high energy density of 43 Wh kg -1 (at 800 W kg -1), which demonstrates the great potential of VNi-MOF (bimetallic organic framework) as a HSC electrode.
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页数:8
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