The Effect of Carbon Nanotubes Addition on the Structure and Electrochemical Performance of Nickel HydroxideReport as inadecuate




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The β-Ni OH2 power was prepared by chemical co-precipitation method. Then a certain amount of multiwall carbon nanotubes were mixed with the prepared β-Ni OH2 and grinded thoroughly to obtain multiwall carbon nanotubes doped nickel hydroxide samples. The microstructure and morphology of the samples were analyzed by XRD and SEM. The electrochemical performance of the samples was characterized by cyclic voltammetry CV, electrochemical impedance spectroscopy EIS, and charge-discharge tests. The results demonstrated that the crystal structure of nickel hydroxides were essentially unchanged with the addition of multiwall carbon nanotubes, however, the surface defects increased. The addition of multiwall carbon nanotubes improved the electrochemical reaction reversibility, decreased the electrochemical reaction impedance, and increased the discharge capacity of nickel hydroxide.

KEYWORDS

nickel hydroxide; chemical co-precipitation; carbon nanotubes; electrochemical performance

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Author: Yan-wei Li, Zheng-gang Zhang, Jin-huan Yao, Ji-qiong Jiang, Yue-xiao Li, Xiao-xi Huang

Source: http://www.scirp.org/



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