Journal
MATERIALS RESEARCH BULLETIN
Volume 74, Issue -, Pages 241-247Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2015.10.035
Keywords
Nanocomposite; Nanostructures; Solvothermal; Electrochemical properties; Energy storage
Categories
Funding
- National Science Foundation of China (NSFC) [21463013, 51425301]
- Science & Technology Support Programs of Jiangxi Province [2142BAB203013]
- Sanyo Chem. Co. Ltd., Japan
- China National Distinguished Young Scientists Project
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A nanocomposite of carbon nanotubes coated with nickel oxide was prepared by a simple hydrothermal method. The structure, morphology and electrochemical performance of the nanocomposite were investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy, electrochemical tests including cyclic voltammogram, galvanostatic charge-discharge and electrochemical impedance spectroscopy, respectively. It presents the highest specific capacitance of 1844 Fg(-1) at 1 Ag-1 and 1145 Fg(-1) at current density of 10 Ag-1 with 88.9% (at 1 Ag-1) capacitance retention after 1000 cycles. The specific capacitance of the nanocomposite is almost double of that of the virginal NiO (972 Fg(-1) at 1 Ag-1). Its cycling behavior is also very good. When combined with activated carbon as the negative electrode, the energy density can be up to 52.6 Wh kg(-)1(.) Such good electrochemical behavior indicates that the nanocomposite is a promising electrode material for supercapacitors. (C) 2015 Elsevier Ltd. All rights
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