Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 12, Pages 5443-5454Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am4003843
Keywords
layered double hydroxides; carbon tube; graphene nanosheet; ternary composite; supercapacitor; electrochemical property
Funding
- Special Innovation Talents of Harbin Science and Technology [2011RFQXG016, 2012RFXXG104]
- Fundamental Research Funds of the Central University (HEUCFZ), Key Program of the Natural Science Foundation of Heilongjiang Province [ZD201219]
- Program of International S&T Cooperation special project [2013DFA50480]
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A Ni-Al layered double hydroxide (LDH), mutil-wall carbon nanotube (CNT), and reduced graphene oxide sheet (GNS) ternary nano-composite electrode material has been developed by a facile one-step ethanol solvothermal method. The obtained LDH/CNT/GNS composite displayed a three-dimensional (3D) architecture with flowerlike Ni-Al LDH/CNT nano-crystallites gradually self-assembled on GNS nanosheets. GNS was used as building blocks to construct 3D nanostructure, and the LDH/CNT nanoflowers in turn separated the two-dimensional (2D) GNS sheets, which preserved the high surface area of GNSs. Furthermore, the generated porous networks with a narrow pore size distribution in the LDH/CNT/GNS composite were also demonstrated by the N-2 adsorption/desorption experiment. Such morphology would be favorable to improve the mass transfer and electrochemical action of the electrode. As supercapacitor electrode material, the LDH/CNT/GNS hybrid exhibited excellent electrochemical performance, including ultrahigh specific capacitance (1562 F/g at 5 mA/cm(2)), excellent rate capability, and long-term cycling performance, which could be a promising energy storage/conversion material for supercapacitor application.
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