期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 461, 期 -, 页码 154-161出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.09.033
关键词
Simonkolleite; Graphene; Supercapacitor; Microwave
资金
- UNESCO UNISA Africa Chair in Nanosciences Nanotechnology
- Nanosciences African Network (NANOAFNET)
- physics department of the University of South Africa (UNISA)
Simonkolleite (Zn-5(OH)(8)Cl-2 center dot H2O) nanoplatelets has been deposited on nickel foam-supported graphene by using an efficient microwave-assisted hydrothermal method. The three-dimensional (3D) porous microstructure of the as-fabricated nickel foam-graphene/simonkolleite (NiF-G/SimonK) composite is beneficial to electrolyte penetration and ions exchange, whereas graphene provide improved electronic conductivity. Structural and morphological characterizations confirmed the presence of highly crystalline hexagonal-shaped nanoplatelets of simonkolleite. Field emission scanning electron microscope (FE-SEM) of the NiF-G/SimonK composite revealed that the SimonK nanoplatelets were evenly distributed on the surface of NiF-G and interlaced with each other, resulting in a higher specific surface area of 35.69 m(2) g(-1) compared to SimonK deposited directly on NiF 17.2 m(2) g(-1). Electrochemical measurements demonstrated that the NiF-G/SimonK composite exhibit a high specific capacitance of 836 F g(-1) at a current density of 1 A g(-1), and excellent rate capability and cycling stability with capacitance retention of 92% after 5000 charge/discharge cycles. (C) 2015 Elsevier Inc. All rights reserved.
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