Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes

High-Performance Supercapacitor Electrodes Based on Composites of MoS2 Nanosheets, Carbon Nanotubes, and ZIF-8 Metal–Organic Framework Nanoparticles

“…Figure shows that the supercapacitor shows an exceptionally stable charge/discharge behavior with approximately 99% of the initial specific capacitance after 20 000 cycles. It should be noted that such a performance has not been achieved in most carbon-, ,, TMD-, ,, ZIF-based ,,, devices. The difference may be attributed to the stable chemistry between the constituent materials.…”

Compositing redox-rich Co–Co@Ni–Fe PBA nanocubes into cauliflower-like conducting polypyrrole as an electrode material in supercapacitors

“…According to Lindström et al , 54 the power-law ( i = aν b ) relates to the non-diffusion-limited capacitive/pseudocapacitive and diffusion-limited faradaic current contribution of the redox peaks by the relationship between the peak current response ( i ) with its corresponding scan rate ( ν ). The b is the exponential component (slope) obtained from the plot of log (peak current) vs. log (scan rate); b = 0.5 for the diffusion-dominated charge storage phenomenon, and b = 1 for the capacitive type charge-storage process.…”

“…Additionally, Trasatti's analysis was used to quantify the contribution of capacitive and diffusive currents to the total capacitance value. 54,[57][58][59][60][61] According to this approach, the total charge (q T ) is the sum of the diffusion-controlled inner (q i ) and non-diffusion-controlled outer surface charge (q o ); by dividing the charge with the CV potential window, total capacitance (C T ), diffusion-controlled inner capacitance (C i ), and non-diffusion controlled outersurface capacitance (C o ) can be determined. 54,62,63 The C T equals the reciprocal y-intercept of the C s À1 vs. n 1/2 plot (Fig.…”

Uniquely Designed Tungsten Oxide Nanopetal Decorated Electropsun PAN Nanofiber for a Flexible Supercapacitor with Ultrahigh Rate Capability and Cyclability

“…As fairly illustrated in the CVs for W-PAN, which deviates from the perfectly rectangular shape, the capacitance of the electrode must generate from the double-layer capacitance as well as the pseudocapacitance. In order to estimate their respective contribution, we followed Trassati’s approach, according to which, the total capacitance is the contribution from the electrostatic adsorption mechanism at the outer surface ( C outer ) and the redox processes in the inner bulk of the electrode ( C inner ) Normally, C outer dominates at the higher sweep rates since the electrolytic ions have limited time to diffuse, while C inner dominates at a lower scan rate due to the lack of time restraints on the ions.…”