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Synthesis and high electrochemical performance of polyaniline/MnO2-coated multi-walled carbon nanotube-based hybrid electrodes

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Abstract

Multi-layered electrodes which consist of polyaniline (PANI)/manganese dioxide (MnO2)-multi-walled carbon nanotubes (MWNTs) are prepared as the electrode materials for supercapacitors. MnO2-MWNTs are made by the in situ direct coating method to deposit MnO2 onto MWNTs; the core/shell structure of multi-layered fibrous electrodes can also be obtained by PANI coating onto the MnO2-MWNTs. The effect of PANI coating on the electrochemical performance and cyclic stability of MnO2-MWNTs is investigated. From the cyclic voltammograms, the PANI/MnO2-MWNTs show remarkably enhanced specific capacitance and cycle stability compared to MnO2-MWNTs, where the highest specific capacitance (350 F/g) is obtained at a current density of 0.2 A/g for the PANI/MnO2-MWNTs as compared to 92 F/g for pristine MWNTs and 306 F/g for MnO2-MWNTs. This indicates that the improved electrochemical performance of PANI/MnO2-MWNTs is due to the enhanced electrical properties by nano-scale-coated MnO2 onto MWNTs and the PANI coating that leads to the increased cycle stability by delaying the dissolution of MnO2 during charge/discharge tests.

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Acknowledgments

This work was supported by the IT Industrial Source Technology Development Business of the Ministry of Knowledge Economy, Korea.

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Authors and Affiliations

  1. Department of Chemistry, Inha University, Incheon, 402-751, Korea

    Ki-Seok Kim & Soo-Jin Park

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  1. Ki-Seok Kim
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  2. Soo-Jin Park
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Correspondence to Soo-Jin Park.

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Kim, KS., Park, SJ. Synthesis and high electrochemical performance of polyaniline/MnO2-coated multi-walled carbon nanotube-based hybrid electrodes. J Solid State Electrochem 16, 2751–2758 (2012). https://doi.org/10.1007/s10008-012-1694-7

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  • DOI: https://doi.org/10.1007/s10008-012-1694-7

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