High-Performance and Stable Polyaniline@Niobium Sulfide Electrode for an Asymmetric Supercapacitor

Conducting polymers have attained a lot of interest due to extraordinary conductivity, large pore size, and surprising stability. In this work, the conducting polymer polyaniline (PANI) and niobium sulfide (NbS) were synthesized by polymerization of aniline and hydrothermal method, respectively. The PANI@NbS nanocomposite electrode material had a specific capacity (Cs) of 1050 C g-1, which is larger than that of the reference sample (NbS = 300 C g-1). Besides, the hybrid device (PANI@NbS//PANI@AC) was designed and the electrochemical characteristics were determined. The hybrid device showed an excellent value of Cs of 1207 C g-1 with higher energy density Ed and power density Pd. The device also exhibited remarkable stability, and 85 % of the initial capacity is retained after 1000 cycles. Due to exceptional conductivity, large pore size, and high stability, conducting polymers have attracted great interest. The conducting polymer polyaniline (PANI) and niobium sulfide (NbS) were synthesized to design a PANI@NbS nanocomposite-based electrode, thus achieving high specific capacity. The results demonstrated enhanced performance of energy storage devices with binary composites. image