Preparation and Characterization of PANI/MWCNT/RGO Ternary Composites as Electrode Materials for Supercapacitors

Abstract

Electrode materials for supercapacitors are being extensively studied at present, the structural and electrochemcial properties of which are still required to be further improved. Hence, a series of polyaniline/reduced graphene oxide binary composites (PANI/RGO, PG-i, i=2, 4, 5) and polyaniline/multi-walled carbon nanotubes/reduced graphene oxide ternary composites (PANI/MWCNT/RGO, PCG-i, i=2, 4, 5) were prepared by a facile hydrothermal method. The morphology, structure and electrochemical performance of these samples are systematically analyzed and discussed. Analysis exhibits that all the samples have abundant pore structure. By changing the ratio of components, PCG-5 shows superior comprehensive electrochemical performance, including a high specific capacitance of 478 F g -1 at 1 A g -1 , a considerable capacitance retention (63.56%, from 1 to 20 A g -1 , and 55.33%, from 1 to 50 A g -1 ) and an extraordinary cycling stability (66.28% after 3500 cycles, at 2 A g -1 ) in 1 M H2SO4. The results prove that the PANI/MWCNT/RGO ternary composite has great potential as supercapacitor electrodes.

Development of PANI/FeS2/MnO2 Composite Electrode Materials for High‐Performance Supercapacitors

“…[24] The O 1s peaks at 533.5 eV, 531.9 eV, and 529.8 eV are related to the OÀ H and O 2À groups of metal-oxygen bonding and adsorption of H 2 O, respectively (Figure 3d). [30] It is clearly from Figure 3e that peaks at 168.8 eV and 161.3 eV are due to S 2 2À , and the peaks at 164.2 eV and 163.1 eV correspond to S n 2À , indicating that S 2 2À and S n 2À are mainly existed in PANI/FeS 2 /MnO 2 4 : 1 : 3. Figure 3f XPS spectrum of Fe 2p consists of two peaks at the 726.2 eV and 712.2 eV positions, corresponding to spin double orbitals.…”

Recent research progress of conductive polymer-based supercapacitor electrode materials

“…Dai et al. 123 prepared PANI/MWCNT/rGO ternary composites by the facile hydrothermal method, as shown in Figure 13(g). When the current density was 1.0 A g −1 , the specific capacitance was 478.0 F g −1 , and the capacitance retention was 64.0% after 3000 GCD cycles.…”

“…(a) The schematic flow chart for preparation of triple-co-axial ternary composites; (b) Scanning electron microscopy (SEM) images of polyanaline (PANI)/MnO 2 /nitrogen and phosphorus co-doped carbon nanofibers (NPCNFs); (c) Scanning transmission electron microscopy (STEM) image of PANI/MnO 2 /NPCNFs; (d) Specific capacitance versus current density; (e) Cycling stability profiles at 10.0 A g −1 ; 116 (f) A schematic illustration of the two-step fabrication process of the carbon nanotube (CNT) film/Fe 3 O 4 /PANI electrode; 118 and (g) The schematic diagram of the preparation process. 123 …”

“…At a scanning rate of 5.0 mV s À1 , the areal capacitance value reached 196.5 mF cm À2 , and the capacitance retention reached 71.4% after 5000 CV cycles showing good cycling stability. Dai et al 123 prepared PANI/ MWCNT/rGO ternary composites by the facile hydrothermal method, as shown in Figure 13(g). When the current density was 1.0 A g À1 , the specific capacitance was 478.0 F g À1 , and the capacitance retention was 64.0% after 3000 GCD cycles.…”

Novel Structure, Electric and Dielectric Properties of PPy-PANI-GO-MWCNTs Composite/MnO2/Fe3O4/n-Si Structure

“…The defects' charges are no longer able to rearrange themselves in response to the applied voltage, which results in a decrease in capacitance with increasing frequency. 35 The creation of interfacial space charge may be responsible for the increase in capacitance and conductance in the low frequency state. Figures 13b and 13c outlines the variation of Cs′ and Cs″ vs frequency at different temperatures and voltages.…”