Conductive PPy@cellulosic Paper Hybrid Electrodes with a Redox Active Dopant for High Capacitance and Cycling Stability

Abstract

Polypyrrole@cellulose fibers (PPy@CFs) electrode materials are promising candidates in the energy storage. Various strategies have been pursued to improve their electrochemical performance. However, the poor conductivity, specific capacitance, and cyclic stability still hindered its application. Compared with the previous studies, we selected AQS with electrochemical activity as a dopant to improve these defects. It exhibits a high capacitance of 829.8 F g−1 at a current density of 0.2 A g−1, which is much higher than that of PPy@CFs electrode material (261.9 F g−1). Moreover, the capacitance retention of PPy:AQS/p-PTSA@CFs reaches up to 96.01% after 1000 cycles, indicating superior cyclic stability. Therefore, this work provides an efficient strategy for constructing high-performance electrode materials for energy storage.

Electrically‐assisted chemical vapor polymerization: A novel method for in situ polymerization of pyrrole

“…The X‐ray diffraction (XRD) patterns were analyzed for pristine polypyrrole film prepared using electrochemical polymerization and polypyrrole coated polyester fabric prepared by using ECVP method. As shown in Figure 12, the peaks at 19.15° and 25.87° correspond to polypyrrole 37 . The characteristic peaks for polyester fabric were observed at 17.59°, 23.17°, and 25.84°, as also reported by Muthukumar & Thilagavathi 38 .…”

“…As shown in Figure 12, the peaks at 19.15 and 25.87 correspond to polypyrrole. 37 The characteristic peaks for polyester fabric were observed at 17.59 , 23.17 , and 25.84 , as also reported by Muthukumar & Thilagavathi. 38 However, the XRD pattern of polyester fabric coated with polypyrrole reveals the same peaks with diminished intensity due to the coating.…”

Fabrication of ternary polyaniline‐titanium dioxide‐polypyrrole (PANI‐TiO2‐PPy) nanocomposite as an efficient polymer electrode for supercapacitors

“…The CV curve of the ternary PANI-TiO 2 -PPy electrode exhibit the prominent redox peaks at 0.28 and 0.22 V (Figure 9d) due to reverse intercalation and deintercalation of K + and OH À ions with PANI + /PANI 2+ , Ti 4+ /Ti 3+ , and PPy + /PPy 2+ ions of the electrode material. 88 PANI-TiO 2 -PPy displays a quasirectangular shaped CV curve that resembles with that of an EDLC capacitor. But the occurrence of prominent redox peaks due to the surface oxidation/reduction reactions strongly indicates the pseudocapacitive nature of the ternary material.…”