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Synthesis and characterization of Co(OH)2/TiO2 nanotube composites as supercapacitor materials

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Abstract

A novel composite of Co(OH)2 and TiO2 nanotubes was synthesized by a chemical precipitation method. Co(OH)2/TiO2 nanotube composites and its microstructure were characterized by transmission electron microscopy (TEM), X-ray diffraction pattern (XRD). The electrochemical capacitance performance of this composite was investigated by cyclic voltammetry and charge–discharge tests with a three-electrode system in 6 M KOH solution. We synthesized different weight ratios of Co(OH)2/TiO2 nanotubes, a maximum specific capacitance of 229 F/g was obtained for the composite. Based on these tests, we propose that TiO2 nanotubes provide the three-dimensional nanotube network structure for the composite and make the Co(OH)2 dispersed. For these reasons, the TiO2 nanotubes used as a framework for Co(OH)2 improve the utilization of Co(OH)2 greatly.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Feng Tao, Yanyu Liang & Hulin Li

  2. College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210013, People’s Republic of China

    Yingzhong Shen

Authors
  1. Feng Tao
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  2. Yingzhong Shen
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  3. Yanyu Liang
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  4. Hulin Li
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Correspondence to Hulin Li.

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Tao, F., Shen, Y., Liang, Y. et al. Synthesis and characterization of Co(OH)2/TiO2 nanotube composites as supercapacitor materials. J Solid State Electrochem 11, 853–858 (2007). https://doi.org/10.1007/s10008-006-0232-x

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  • DOI: https://doi.org/10.1007/s10008-006-0232-x

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