Improved performance of flexible supercapacitor using naphthalene sulfonic acid‐doped polyaniline/sulfur‐doped reduced graphene oxide nanocomposites

Abstract

Summary In this study, we followed a facile method to grow well‐aligned PANI nanostructures on S‐doped reduced graphene oxide nanosheets (SPANI/S‐rGO) using hydrothermal method combined with soft template polymerization of aniline where naphthalene sulfonic acid is used as a dopant for PANI as well as the soft template. The effect of using different wt% of S‐rGO on the structural, morphology, and electrochemical performance of SPANI/S‐rGO composites has been evaluated. Supercapacitor fabricated using SPANI/S‐rGO10 (10 wt% of S‐rGO) composite based electrodes delivered a high specific capacitance of 347.5 F/g at a current density of 1 A/g in symmetrical cell design (the specific capacitance was calculated based on a single electrode). Only 11% of its initial capacitance is lost after 2500 cycles at a current density of 2 A/g. The enhanced performance is attributed to the optimum loading of S‐rGO in designing binary composite, well‐aligned growth of SPANI nanostructures on S‐rGO sheets, and synergistic effect of both S‐rGO and SPANI. The facile synthesized SPANI/S‐rGO composite electrode material with the aforementioned features is considered to be a promising candidate for a high‐performance supercapacitor.

Interconnected CoNi-Se Hollow Flakes through Reduced Graphene Oxide Sheets as a Cathode Material for Hybrid Supercapacitors

“…The intensified I D /I G ratio observed in CoNi-Se/rGO denotes a heightened disorder within the graphene matrix, providing compelling evidence for the transformation of GO into rGO. 36 Moreover, the Raman spectra depicted in Figure 1c reveal two distinct vibrational modes associated with the spinel structure, namely F 2g and A 1g of CoNi-Se, positioned at 580 and 670 cm −1 . 32 The CoNi-Se/rGO surface was examined using XPS.…”

S, N and Cl Separately Doped Graphene Oxide/Polyaniline Composites for Hybrid Supercapacitor Electrode

“…2b). 49 It was clearly seen that the amount of Cl doped GO supports the polymerization of PANI. In testing the electrochemical performance of the electrodes, Cl doped GO added to the PANI structure revealed a behavior consistent with the enhanced capacitance properties.…”

Electrochemical performance of symmetric supercapacitors under compression: Size effects of activated carbon spheres

“…The rapid developments of electronics and electrical vehicles have raised the research interest in highperformance and miniaturized power sources. [1][2][3][4][5] Supercapacitors (SCs), which store electric energy either in electrochemical double layer (EDL) [6][7][8] or through reversible Faradic reaction, [9][10][11][12] have attracted tremendous research interest. Compared to metal-ion batteries, SCs with high power density, outstanding cycling performances, and low maintenance cost are considered ideal power sources for electrical devices.…”

“…The rapid developments of electronics and electrical vehicles have raised the research interest in high‐performance and miniaturized power sources 1‐5 . Supercapacitors (SCs), which store electric energy either in electrochemical double layer (EDL) 6‐8 or through reversible Faradic reaction, 9‐12 have attracted tremendous research interest.…”