Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 686, Issue -, Pages 969-975Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.06.156
Keywords
Co3O4; Mesoporous; Ultrathin nanosheets; Electrochemical capacitors
Categories
Funding
- National Natural Science Foundation of China [21301007]
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Highly ultrathin mesoporous Co3O4 nanosheets have been successfully designed and constructed on nickel foam substrate via a facile two-step approach, including a hydrothermal technique without any surfactant and followed calcination of precursor. Owing to the unique mesoporous ultra-thin structural features, the capacitance of Co3O4 nanosheets electrode was as high as 610 mF cm(-2) at a current density of 1 mA cm(-2), and the cycling stability remained about 94.5% after 3000 cycles at current density of 4 mA cm(-2). In addition, an asymmetric supercapacitor device based on the ultrathin mesoporous Co3O4 nanosheets was fabricated and has shown promising energy densities of 136 Wh kg(-1) at power density of 0.75 kW kg(-1). These results demonstrated that the ultrathin mesoporous Co3O4 nanosheets were excellent candidate for electrochemical supercapacitor devices. (C) 2016 Elsevier B.V. All rights reserved.
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