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Investigation of polyaniline films doped with Co2+ as the electrode material for electrochemical supercapacitors

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Abstract

H+ and Co2+ ions co-doped polyaniline were synthesized by cyclic voltammetry onto the stainless steel mesh with various concentrations of cobalt chloride (CoCl2 · 6H2O) in electrolyte. The structure and morphology of polyaniline (PANI) and PANI/Co2+ films were characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) techniques. The electrochemical properties of PANI and PANI/Co2+ films were investigated by cyclic voltammetry, galvanostatic charge–discharge test, and electrochemical impedance spectroscopy (EIS) in 0.5 mol L−1 H2SO4 electrolyte in a three-electrode system. The PANI/0.3 M Co2+ film shows a larger specific capacitance of 736 F g−1 at a current density of 3 mA/cm2 and lower resistance compared with the pure PANI film. The results indicated that the PANI/Co2+ films are promising material for supercapacitors.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 51062011).

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Authors and Affiliations

  1. College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China

    Hui Xu, Jun-xia Wu, Chun-lei Li, Jun-long Zhang & Xiu-xiu Wang

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  1. Hui Xu
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  2. Jun-xia Wu
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  3. Chun-lei Li
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  4. Jun-long Zhang
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  5. Xiu-xiu Wang
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Correspondence to Hui Xu.

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Xu, H., Wu, Jx., Li, Cl. et al. Investigation of polyaniline films doped with Co2+ as the electrode material for electrochemical supercapacitors. Ionics 21, 1163–1170 (2015). https://doi.org/10.1007/s11581-014-1267-0

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  • DOI: https://doi.org/10.1007/s11581-014-1267-0

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