Synthesis and Characterization of Ni(OH)2/Multiwalled Carbon Nanotubes Nanocomposites for Electrochemical Capacitors

Zhan Jun Yu; Ying Dai; Wen Chen

doi:10.4028/www.scientific.net/AMR.239-242.2968

Paper Titles

Theoretical Model Study of Micro-Electric Field Effects on Seepage in Micro Particle Clays
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Reinforcement of Natural Rubber with Quartz/Sericite/Wollastonite
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Effect of Sizing Agent on the Surface of Carbon Fiber and Interfacial Adhesion of Carbon Fiber/Vinyl Ester Resin Composite
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Structural, Optical and Photocatalytic Photodegradation Properties of Zn1−xMnxO Prepared by the Sol-Gel Process
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Synthesis and Characterization of Ni(OH)₂/Multiwalled Carbon Nanotubes Nanocomposites for Electrochemical Capacitors
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Research Status and Prospects of Surface Nanocrystalline Technology of the Metal Materials
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Interfacial Microstructure Evolution of Copper/Aluminium Laminates with Different Annealing Processes
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Synthesis，Film Morphology and Performance on Fabrics of a Novel Amino Functional Polysiloxane
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Study on Abrasive Wear Behavior and Mechanisms of 7Cr7Mo2V2Si Steel as Drilling Tool Materials
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Synthesis and Characterization of Ni(OH)₂/Multiwalled Carbon Nanotubes Nanocomposites for Electrochemical Capacitors

Abstract:

Ni(OH)₂/multiwalled carbon nanotubes (Ni(OH)₂/MWNTs) nanocomposites were synthesized by hydrothermal method. The microstructures of such nanocomposites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrochemical properties studies were carried out using cyclic voltammetry (CV), galvanostaitc charge/discharge and electrochemical impedance spectroscopy method. The presence of MWNTs network in the Ni(OH)₂ significantly improved the electrical conductivity of the host Ni(OH)₂ by the fromation of conducting network of MWNT and the active sites for the redox rection of the metal hydroxide. The specific capacitance of the new composites was significantly improved (MWNTs of 20 wt.%, 2144 F/g) compared to Ni(OH)₂ (MWNTs of 0 wt.%, 1772 F/g) in 6 M KOH solution at a charge-discharge current density of 4 mA/cm². Therefore, the Ni(OH)₂/MWNTs nanocomposites can be a potential application electrode material for electrochemical capacitors.