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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 5
BKCSDE 33(5)
May 20, 2012 

Preparation of Ni Nanoparticles-TiO2 Nanotube Arrays Composite and Its Application for Electrochemical Capacitor
Huichao He, Yunhuai Zhang, Peng Xiao,* Yannan Yang, Qing Lou, Fei Yang
Ni Nanoparticles, TiO2 Nanotubes, Electrochemical capacitor
Ni nanoparticles-TiO2 nanotube arrays (Ni/TiO2NTs) composites were prepared by pulsed electrodeposition method and subsequently characterized by means of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The FESEM results showed that highly dispersed Ni nanoparticles were not only loaded on the top of the TiO2NTs but also within the tubular structure, and the particle size of Ni prepared at different current amplitude (100, 200 and 300 mA·cm−2) was in the range of 15 to 70 nm. The electrochemical studies indicated that Ni nanoparticles loaded on the highly ordered TiO2NTs are readily accessible for electrochemical reactions, which improve the efficiency of the Ni nanoparticles and TiO2NTs. A maximum specific capacitance (27.3−2) was obtained on the Ni/TiO2NTs composite electrode that prepared at a current of 200−2, and the electrode also exhibited excellent electrochemical stability.
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