☆ 4.7 Article

In-situ fabrication of nanosheet arrays on copper foil as a new substrate for binder-free high-performance electrochemical supercapacitors

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2017)

期刊

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

卷 802, 期 -, 页码 48-56

出版社

ELSEVIER SCIENCE SA

DOI: 10.1016/j.jelechem.2017.08.048

关键词

Electrochemical supercapacitor; Hydrothermal; Nanaosheet arrays; Dissolution-precipitation; Copper oxide; Charge storage

类别

Chemistry, Analytical Electrochemistry

资金

Center of Excellence for Nanostructures of the Sharif University of Technology, Tehran, Iran
Institute of National Science Foundation (INSF, Iran)

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摘要

A facile hydrothermal method and subsequent electroactivation have been developed to fabricate three-dimensional (3D) CuO nanosheet arrays on the copper foil substrate, which can be used directly as a binder-free electrode for supercapacitor applications. Under optimum conditions, by using this facile method, a high capacitance of 125 mF/cm(2) at a current density of 0.3 mA/cm(2) is obtained. The prepared supercapacitor showed a good rate capability (46.4% capacitance retention, when the current density is increased to more than 30 times) and an excellent cyclability (more than 88% capacitance retention after 3000 cycles).

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