Conducting polymers are increasingly attracting the interest of many researchers in different areas due to their good conductivity, stability and easy preparation. Polyaniline is heavily studied in sensors, corrosion protection, electrochromic devices, and supercapacitors, however, even with numerous applications, there are still few pieces of literature that report their electrochemical behavior in regions low-frequency of by electrochemical impedance spectroscopy (EIS). In this work, polyaniline was electropolymerized by galvanic synthesis (chronoamperometry) in stainless steel substrate. Its performance was evaluated by cyclic voltammetry (CV) galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). It was observed in its low-frequency pseudocapacitive analysis, in the benzoquinone and hydroquinone intermediate regions, capacitance values above 100 mF·cm⁻², and in the emeraldine state, 295 F·g⁻¹ was obtained. Such results provide a better and detailed understanding of PANI oxidation and reduction processes and could optimize the use of the polymer in various fields of applications.

导电聚合物具有良好的导电性，稳定性和易于制备的特性，因此越来越受到不同领域的许多研究人员的关注。聚苯胺在传感器，腐蚀防护，电致变色器件和超级电容器等方面进行了大量研究，然而，即使在众多应用中，也很少有文献通过电化学阻抗谱（EIS）报告其在低频区域的电化学行为。在这项工作中，聚苯胺通过电合成（计时电流法）在不锈钢基板上进行电聚合。通过循环伏安法（CV）恒电流充放电（GCD）和电化学阻抗谱（EIS）评估其性能。在低频伪电容分析中观察到了这一点，^{- 2}，并且在翠绿亚胺状态，295·F·克^{- 1}得到。这样的结果提供了对PANI氧化和还原过程的更好，更详细的理解，并且可以优化聚合物在各种应用领域中的使用。