Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 773, Issue -, Pages 367-375Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.09.197
Keywords
ZnCo2O4; Nanosheets; Annealing; Asymmetric supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51772070, 11504097]
- Natural Science Foundation of Heilongjiang Province [E2018051]
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Porous network ZnCo2O4 nanosheets are successfully achieved by a simple hydrothermal process and adjusting the annealing temperature. The electrochemical performance of ZnCo2O4 nanosheets is significantly influenced by different annealing temperatures. It has been discovered that electrode of ZnCo2O4 that has be annealed at 200 degrees C shows an ultrahigh areal capacitance of 3.19 F cm(-2) at a current density of 2 mA cm(-2). An asymmetric supercapacitor device was assembled by ZnCo2O4 annealed at 200 degrees C as positive electrode and activated carbon as negative electrode, which exhibits the energy densities of 50.7 and 37.7 Wh kg(-1) at power densities of 187.6 and 2950.4 W kg(-1), respectively. (C) 2018 Elsevier B.V. All rights reserved.
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