Preparation of MgCo2O4@NiCo2S4 core-shell nanocomposites for high-performance asymmetric supercapacitors

被引：7
|
作者：
Yu, Yue [1 ,2 ]
Liu, Jianbo [1 ,2 ]
Wang, Lizhong [1 ,2 ]
Hou, Lujin [1 ,3 ]
机构：
[1] Jilin Normal Univ, Key Lab Funct Mat Phys & Chem, Minist Educ, Siping 136000, Peoples R China
[2] Jilin Normal Univ, Coll Informat Technol, Siping 136000, Peoples R China
[3] Jilin Normal Univ, Coll Phys, Siping 136000, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2023年 / 439卷
关键词：
Supercapacitors; Core -shell nanocomposite structures; Specific capacitance; Energy density; ELECTRODE MATERIAL; NANOTUBE ARRAYS; ENERGY-STORAGE; CARBON CLOTH; NICKEL FOAM;
D O I：
10.1016/j.electacta.2022.141664
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The MgCo2O4@NiCo2S4 core-shell structure was prepared using hydrothermal and annealing methods. The synergy between MgCo2O4 nanoneedles and NiCo2S4 nanosheets is beneficial to improved electronic trans-mission capability. In this experiment, the specific capacity of MgCo2O4@NiCo2S4 can reach 1255.1 C g(-1) at 1 A g(-1) . supercapacitor (ASC) was designed using MgCo2O4@NiCo2S4 and activated carbon (AC) as electrode materials. It has an excellent cycle stability of 83.2% after 5000 cycles. Meanwhile, the ASC shows a remarkable energy density of 111.26 Wh kg(-1) at 800.4 W kg (-1.) In conclusion, MgCo2O4@NiCo2S4 is very promising as an energy storage material. And it shows good capacity performance and cycling stability (78.07% after 2000 cycles). An asymmetric
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页数：9
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