Despite the widespread use of polyaniline as a pseudocapacitor material, the cycling stability and rate capability of polyaniline- based electrodes are of concern because of the structural instability caused by repeated volumetric swelling and shrinking during the charge/discharge process. Herein, nanofiber-structured polyaniline was synthesized onto activated carbon textiles to ensure the long-term stability and high-rate capability of pseudocapacitors. The nanoporous structures of polyaniline nanofibers and activated textile substrate enhanced the ion and electron transfer during charge/discharge cycles. The resulting pseudocapacitor electrodes showed high gravimetric, areal, and volumetric capacitance of 769 F g− 1, 2638 mF cm− 2, and 845.9 F cm− 3, respectively; fast charge/discharge capability of 92.6% capacitance retention at 55 mA cm− 2; and good longterm stability of 97.6% capacitance retention over 2000 cycles. Moreover, a symmetric supercapacitor based on polyaniline nanofibers exhibited a high energy of 21.45 Wh cm− 3 at a power density of 341.2 mW cm− 3 in an aqueous electrolyte.

Deposition of polyaniline nanofibers on activated carbon textile for high-performance pseudocapacitors
    Abstract
    1 Introduction
    2 Materials and methods
        2.1 Materials
        2.2 Preparation and characterization of PANi-NFCT
        2.3 Electrochemical characterization of PANi-NFCT electrode
    3 Results and discussion
    4 Conclusion
    Acknowledgements 
    References

• Gyumin Kim(Department of Energy Resources and Chemical Engineering, Kangwon National University, Gangwon‑Do, Samcheok 25913, Republic of Korea)
• Hong Jun Park(Department of Energy Resources and Chemical Engineering, Kangwon National University, Gangwon‑Do, Samcheok 25913, Republic of Korea)
• Sung Tae Jang(Department of Energy Resources and Chemical Engineering, Kangwon National University, Gangwon‑Do, Samcheok 25913, Republic of Korea)
• Bong Gill Choi(Department of Energy Resources and Chemical Engineering, Kangwon National University, Gangwon‑Do, Samcheok 25913, Republic of Korea) Corresponding author