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Issue 16, 2013
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Polypyrrole doped with redox-active poly(2-methoxyaniline-5-sulfonic acid) for lithium secondary batteries

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Abstract

Polypyrrole is a promising electrode material for flexible/bendable energy storage devices due to its inherent fast redox switching, mechanical flexibility, easy processability and being environmentally benign. However, its low attainable capacity limits its practical applications. Here, we synthesise a polypyrrole/poly(2-methoxyaniline-5-sulfonic acid) (PPy/PMAS) composite by incorporating redox-active PMAS into a PPy matrix via an electropolymerization method. For comparison, polypyrrole containing the electrochemically inert dopant p-toluenesulfonate (PPy-pTS) was prepared under the same conditions. The resultant PPy/PMAS film shows greatly improved electrochemical properties by harnessing the contribution from PMAS, i.e. higher specific capacity, better rate capability and improved cycling stability when used as a cathode material in a lithium secondary battery. It delivers a high specific capacity of 120.6 mAh g−1 at a current density of 0.1 A g−1, and retains about 88.5% of the capacity (106.7 mAh g−1) over 800 consecutive cycles at a high current density of 1 A g−1.

Graphical abstract: Polypyrrole doped with redox-active poly(2-methoxyaniline-5-sulfonic acid) for lithium secondary batteries

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Publication details

The article was received on 03 Oct 2012, accepted on 08 Feb 2013 and first published on 08 Feb 2013


Article type: Paper
DOI: 10.1039/C3RA40406D
Citation: RSC Adv., 2013,3, 5447-5452
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    Polypyrrole doped with redox-active poly(2-methoxyaniline-5-sulfonic acid) for lithium secondary batteries

    Y. Yang, C. Wang, S. Ashraf and G. G. Wallace, RSC Adv., 2013, 3, 5447
    DOI: 10.1039/C3RA40406D

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