Hydrothermal synthesis of mesoporous MnCo2O4/CoCo2O4 ellipsoid-like microstructures for high-performance electrochemical supercapacitors

被引:58
作者
Liao, Fan [1 ]
Han, Xingrong [1 ]
Zhang, Yanfei [1 ]
Han, Xinghua [2 ]
Xu, Chunju [1 ]
Chen, Huiyu [1 ]
机构
[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Shanxi, Peoples R China
[2] North Univ China, Sch Chem Engn & Technol, Taiyuan 030051, Shanxi, Peoples R China
关键词
MnCo2O4; Mesoporous materials; Supercapacitors; Electrochemical performance; SHELL NANOWIRE ARRAYS; HOLLOW MICROSPHERES; NI FOAM; FACILE SYNTHESIS; POROUS MNCO2O4; ELECTRODE; COMPOSITE; STORAGE; ANODE; CO3O4;
D O I
10.1016/j.ceramint.2019.01.005
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Design and fabrication of unique micro/nanostructural MnCo2O4-based electrode material for applications in supercapacitors with excellently electrochemical performance is still of great challenge. In this work, novel MnCo2O4/CoCo2O4 ellipsoid-like (MCE) microstructures were synthesized through a facile hydrothermal route with a post annealing treatment in air. Such MnCo2O4/CoCo2O4 composite possessed a specific surface area of 42.2 m(2) g(-1) with an average pore size of 17.4 nm. The electrochemical performance of the obtained porous MnCo2O4/CoCo2O4 ellipsoids as electrode for pseudocapacitors was investigated by galvanostatic charge-discharge and cyclic voltammetry measurements in 2 M of KOH electrolyte. The composite exhibited a specific capacitance as high as 614 F g(-1) at 1 A g(-1) and an outstanding cycling behavior with about 77.5% capacitance retention of its initial specific capacitance after 5000 cycles at 5 A g(-1). The outstanding electrochemical performances of the porous MnCo2O4/CoCo2O4 composite are mainly attributed to the combination of both types of electrode materials and its intriguing mesoporous ellipsoid-like structure, and make it one of the most promising candidate materials for the advanced energy storage devices.
引用
收藏
页码:7244 / 7252
页数:9
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