Polyaniline grafted chitosan/GO‐CNT/Fe₃O₄ nanocomposite as a superior electrode material for supercapacitor application

Abstract

Developing appropriate stable electroactive electrode materials for supercapacitor application is the challenging issue, which attracts enormous attention in recent decades. In this regard, Fe3O4 nanoparticles are firstly synthesized on chitosan/graphene oxide‐multiwall carbon nanotubes (CS/GM/Fe3O4). Then, polyaniline (PANI) is grafted on it via in situ chemical polymerization and named as CS/GM/Fe3O4/PANI. The as‐prepared nanocomposites are characterized by Field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, and energy dispersive X‐ray spectroscopy. The capacitive properties of the electrodes are investigated in a three electrode configuration in 0.5 M Na2SO4 electrolyte by various electrochemical techniques. The specific capacitance of CS/GM/Fe3O4/PANI electrode is 1513.4 Fg−1 at 4 Ag−1 which is 1.9 times higher than that of CS/GM/Fe3O4 (800 Fg−1). Meanwhile, the electrodes exhibit appropriate cycle life along with 99.8% and 93.95% specific capacitance at 100 Ag−1 for chitosan/GO‐CNT/Fe3O4 and polyaniline grafted chitosan/GO‐CNT/Fe3O4, respectively.

Nanosheet‐like MoO3 and conductive PANI electrodeposited on flexible carbon cloth for self‐supported solid‐state supercapacitor electrode

“…The CC has no absorption vibration peak and the MoO 3 /CC shows three new peaks, which is the terminal oxygen symmetry stretching mode of MoO, the bridge oxygen asymmetry and symmetry stretching mode of MoOMo are at 990, 876, and 817 cm −1 , respectively 32 . Meanwhile, the PANI/CC also shows some new peaks at 1000–1600 cm −1 , corresponding to PANI (1556 cm −1 for Quinone rings and 1492 cm −1 for Benzene rings) 33 . The peaks of 1305, 1250 cm −1 are attributed to the stretching vibration of CNC and asymmetric stretching vibration of NH 2 +  in the polaron structure, respectively 34 .…”

“…32 Meanwhile, the PANI/CC also shows some new peaks at 1000-1600 cm À1 , corresponding to PANI (1556 cm À1 for Quinone rings and 1492 cm À1 for Benzene rings). 33 The peaks of 1305, 1250 cm À1 are attributed to the stretching vibration of C N C and asymmetric stretching vibration of NH 2 + in the polaron structure, respectively. 34 The PMC-3 has characteristic peaks of both PANI and MoO 3 .…”

Synergistic effect of gold nanoparticles decorated functionalized carbon nanotubes nanohybrids on the thermal, dielectric, and sensing properties of polyaniline ternary nanocomposites

“…However, the (2 0 0) diffraction plane of the PANI matrix may be merged with the diffraction plane of the CNTs, or it is considerably diminished due to a decrease in the crystallinity of the PANI matrix 73 . Both PANI/Au@ f ‐SWNTs and PANI/Au@ f ‐MWNTs ternary nanocomposites exhibit the peak of CNTs as well as AuNPs along with the peaks of PANI at 2 θ value of 14.67°, 20.50°, and 25.67° due to (0 1 1), (0 2 0), and (2 0 0) crystal planes of the PANI 1,73,74 . Furthermore, it is concluded that the Au@ f ‐SWNTs and Au@ f ‐MWNTs hybrid nanofillers are effectively incorporated into the PANI matrix.…”

“…73 Both PANI/Au@f-SWNTs and PANI/ Au@f-MWNTs ternary nanocomposites exhibit the peak of CNTs as well as AuNPs along with the peaks of PANI at 2θ value of 14.67 , 20.50 , and 25.67 due to (0 1 1), (0 2 0), and (2 0 0) crystal planes of the PANI. 1,73,74 Furthermore, it is concluded that the Au@f-SWNTs and Au@f-MWNTs hybrid nanofillers are effectively incorporated into the PANI matrix.…”

Screen printable PANI/carbide-derived carbon supercapacitor electrode ink with chitosan binder

“…Additionally, neutral electrolytes may provide a wider potential window than acidic or alkaline electrolytes; hence, SCs that consist of neutral electrolytes are capable of achieving a higher energy density [35,36]. Previous research established the possibility of 0.5 M Na 2 SO 4 solution as a neutral electrolyte for PANI electrodes in SC applications [37,38].…”