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Deposition of polyaniline nanofibers on activated carbon textile for high-performance pseudocapacitors

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2024, 34(9), pp.2411~2419
  • DOI : 10.1007/s42823-024-00770-w
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 4, 2024
  • Accepted : June 26, 2024
  • Published : December 5, 2024

Kim Gyumin 1 Park Hong Jun 1 Jang Sung Tae 1 Bong Gill Choi 1

1강원대학교

Accredited

ABSTRACT

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 long-term 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.

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This paper was written with support from the National Research Foundation of Korea.