期刊
CERAMICS INTERNATIONAL
卷 45, 期 3, 页码 4059-4066出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.11.172
关键词
ZnCo2O4; Solvothermal synthesis; Porous structure; Supercapacitors; Electrochemical performance
资金
- International Cooperation of Science and Technology Project in Shanxi Province [201703D421040]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of Shanxi Province
- Science Foundation of North University of China [110121]
Novel urchin-like ZnCo2O4 microstructures have been successfully prepared through a facile two-step synthetic strategy involving a solvothermal process in a combined solution of water and ethanol, and subsequent annealing treatment of the precursor in air. These urchin-like ZnCo2O4 microspheres are composed of many porous nanorods with diameter ranging from 80 to 200 nm, achieving a specific surface area of 28 m(2) g(-1). The shapes of resultant ZnCo2O4 samples can be effectively controlled by changing the volume ratios of water to ethanol. The unique urchin-like ZnCo2O4 microsphere electrode delivers a high specific capacitance of 677 F g(-1) at 1 A g(-1) as well as a remarkable cycling stability with 107.3% capacitance retention after 5000-cycle charge-discharge process at 5 A g(-1) in KOH electrolyte (2 M). The enhanced supercapacitor behavior is probably attributed to its mesoporous structure providing large reaction surface area and fast transfer for ions/electrons. It exhibits a great potential as an advanced electrode material in the field of high-performance electrochemical capacitors.
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