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DMSO-treated flexible PEDOT:PSS/PANi fiber electrode for high performance supercapacitors

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Abstract

Wearable energy storage device nowadays gains great interest due to sharply increased demand for highly flexible, stretchable and embedded electronics, where fiber-based supercapacitor (FSC) is a competitive counterpart. The poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid)/ polyaniline (PEDOT:PSS/PANi) fiber has been prepared via an accessible technique of one-dimensional (1D) self-assembly. Nevertheless, PSS as the main cross-linking matrix may lead to more hopping sites for charge carriers, lessening the continuous electrically conductive path. Herein, PEDOT:PSS/PANi fiber was treated with dimethyl sulfoxide (DMSO) to remove the insulative PSS chains. Coupling high electroactivity of PANi and high conductivity of PEDOT, the optimized DMSO-PEDOT:PSS/PANi fiber displays enhanced electrochemical properties with a high specific capacitance (Cs) of 367.7 F g−1 at 0.5 A g−1 and good rate capability. Moreover, a symmetric FSC based on the DMSO-P4P6 fiber exhibits a high energy density of 42.4 Wh kg−1 at a power density of 302.3 W kg−1.

Graphical abstract

PEDOT: PSS/PANi fibers are prepared via a simple technique of one-dimensional (1D) self-assembly, and the PEDOT: PSS/PANi fiber exhibits superior flexibility, electrical conductivity, and electrochemical properties.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51762018 and 51863009), the Natural Science Foundation of Jiangxi Province (20181ACB20010), Foundation of Jiangxi Science and Technology Normal University (2019BSQD001 and 2019BSQD018), the Academic and Technical Leader Plan of Jiangxi Provincial Main Disciplines (20182BCB22014) and the Jiangxi Provincial Department of Education (GJJ190584 and GJJ190612).

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Authors and Affiliations

  1. Department of Physics, Jiangxi Science and Technology Normal University, Nanchang, 330013, People’s Republic of China

    Guoqiang Liu, Xiao Chen, Congcong Liu, Qinglin Jiang, Fengxing Jiang, Jianyu An, Jingkun Xu & Peipei Liu

  2. Flexible Electronics Innovation Institute (FEII), Jiangxi Science & Technology Normal University, Nanchang, 330013, People’s Republic of China

    Jingkun Xu

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  1. Guoqiang Liu
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Liu, G., Chen, X., Liu, C. et al. DMSO-treated flexible PEDOT:PSS/PANi fiber electrode for high performance supercapacitors. J Mater Sci 56, 14632–14643 (2021). https://doi.org/10.1007/s10853-021-06226-0

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