Fabrication of novel solid-state supercapacitor using a Nafion polymer membrane with graphene oxide/multiwalled carbon nanotube/polyaniline

Effect of polyaniline‐coated carbon nanotube and nanosilver hybrid nanoparticles on the dielectric properties of poly(methyl methacrylate) nanocomposites

“…The dielectric properties of the samples were obtained using a computer controlled LCR meter (model: PSM 1735, Newtons4th Limited, Schaumburg, Illinois) on application of an alternating electric field across the sample cell with a blocking electrode (aluminum foil) in the frequency range of 10 1 -10 6 Hz at room temperature. the C 5 C stretching of the quinoid ring, C 5 C stretching of the benzenoid ring, C-N stretching vibration of the secondary aromatic amine group, C 5 N stretching of quinoid ring, N 5 Q5N vibration of the quinoid ring (Q represents the quinoid ring), para substituted aromatic rings indicating formation of PANI, out of plane deformation of C-H in the benzene ring, respectively that confirms the presence of the emeraldine salt state of PANI [50][51][52][53][54].…”

“…Pure PANI shows several spectral bands between 800 and 1,735 cm −1 that matches with the spectral bands of other samples. The peaks observed at around 1,547, 1,446, 1,286, 1,230, 1,148, 876, and 835 cm −1 are assigned to the C = C stretching of the quinoid ring, C = C stretching of the benzenoid ring, C–N stretching vibration of the secondary aromatic amine group, C = N stretching of quinoid ring, N = Q=N vibration of the quinoid ring (Q represents the quinoid ring), para substituted aromatic rings indicating formation of PANI, out of plane deformation of C–H in the benzene ring, respectively that confirms the presence of the emeraldine salt state of PANI .…”

“…However, the magnitude of dielectric loss factor increases at low frequency region, which may be attributed to the lack of orientation and polarization of molecular dipoles along the applied frequency direction [20]. Pure PANI and PANI-coated f-CNTs and AgNPs hybrid nanofillers shows very high value of loss tangent with a characteristic peak at low frequency region, which gives information regarding relaxation time as well as the capacitive behavior of the hybrid nanofillers [50]. The loss tangent peak broadened and slightly shifted toward the higher frequency region in case of PANI@f-CNTs and PANI@AgNPs hybrid nanoparticles as compare to pure PANI, which informs that the relaxation time reduces due to the high conductivity of f-CNTs and AgNPs nanofillers [30].…”

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

“…The CS/GM composite was prepared according to our previous works 21,22 . 0.5 g of the as‐prepared CS/GM was dispersed in 200 ml of distilled water in an ultrasonic bath for 30 min.…”

Superior overall water splitting performance in polypyrrole photoelectrode by couplingNrGOand modifying electropolymerization substrate

“…By plotting the C sp versus υ −1/2 (as shown in Figure S2(b)), the values of k 1 and k 2 were calculated from the slope and intercept, respectively. [48][49][50] Figure 7(c) compares the contribution of C dl and C F in the C sp of all photoelectrodes. The highest C F /C dl ratio was observed in the Ti/MMO/PPy-NrGO, indicating the highest electron and hole transfers and so improved electrocatalytic activity with the contribution of oxidation and large surface area characteristic of NrGO nanosheets.…”