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<p>Two flexible supercapacitor electrodes are developed using spin-coated 2-(2,3-dihydroxypropoxy)polyaniline (H-PANI), and sodium dodecyl sulphate emulsified polyaniline (E-PANI) after in situ oxidative polymerization of the monomers. X-ray diffraction, thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, scanning electron microscopy, thermogravimetric analysis (TGA), and a multimeter (Keithley Model 2000) are used to characterize the crystallinity, structure, morphology, optical properties, thermal stability, and electrical conductivity of PANI, E-PANI, and H-PANI. The H-PANI's excellent electrical conductivity (2.93 × 10<sup>–3</sup> S/cm) is significantly greater than E-PANI's electrical&#xa0;conductivity&#xa0;(2.79 × 10<sup>–3</sup> S/cm). The solubility analysis indicates that the H-PANI is more soluble in water, NMP, DMSO, methanol, ethanol, CHCl<sub>3</sub> and DMF. According to the electrochemical performance, the synthesized H-PANI electrode showed a maximum specific capacitance of 550.12 Fg<sup>−1</sup> at 0.1 Ag<sup>−1</sup>current density. In addition, after 5000 charge/discharge cycles, H-PANI shows suitable redox repeatability and cycle stability of 81.18%. The symmetric two-electrode supercapacitor device exhibits a high specific capacitance of 186.45 Fg<sup>−1</sup> at 0.5 Ag<sup>−1</sup> and 92.85% capacity retention over 5000 cycles. When used as a practical power source, low leakage current and self-discharge properties of the supercapacitor&#xa0;demonstrated its enormous potential for use in electronics. </p>

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Hydroxyl-substituted polyaniline: synthesis, characterization, solubility and electrochemical properties

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Sudipta Chutia,
  • Nandita Handique,
  • Kandarpa Phukan

摘要

Two flexible supercapacitor electrodes are developed using spin-coated 2-(2,3-dihydroxypropoxy)polyaniline (H-PANI), and sodium dodecyl sulphate emulsified polyaniline (E-PANI) after in situ oxidative polymerization of the monomers. X-ray diffraction, thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, scanning electron microscopy, thermogravimetric analysis (TGA), and a multimeter (Keithley Model 2000) are used to characterize the crystallinity, structure, morphology, optical properties, thermal stability, and electrical conductivity of PANI, E-PANI, and H-PANI. The H-PANI's excellent electrical conductivity (2.93 × 10–3 S/cm) is significantly greater than E-PANI's electrical conductivity (2.79 × 10–3 S/cm). The solubility analysis indicates that the H-PANI is more soluble in water, NMP, DMSO, methanol, ethanol, CHCl3 and DMF. According to the electrochemical performance, the synthesized H-PANI electrode showed a maximum specific capacitance of 550.12 Fg−1 at 0.1 Ag−1current density. In addition, after 5000 charge/discharge cycles, H-PANI shows suitable redox repeatability and cycle stability of 81.18%. The symmetric two-electrode supercapacitor device exhibits a high specific capacitance of 186.45 Fg−1 at 0.5 Ag−1 and 92.85% capacity retention over 5000 cycles. When used as a practical power source, low leakage current and self-discharge properties of the supercapacitor demonstrated its enormous potential for use in electronics.