Introducing non-conjugated ionic spacer in metallo-supramolecular polymer: Generation of nanofibers for high-performance electrochromic supercapacitor

Enriching Oxygen Vacancy in Co3O4 by Solution Combustion Synthesis for Enhanced Supercapacitive Property

“…The voltammograms showed that the anodic ( i pa ) and cathodic ( i pc ) peak currents linearly increase with the square root of scan rates (Figure S8a–c in the SI), indicating a predominant faradic behavior with fast charge transfer and low internal resistance. The charge storage property can be evaluated using eq , ,− i = a v b where i denotes peak current, v denotes the scan rate, and a and b are the adjustable parameters. When b = 1, i will be linearly interrelated to the scan rate, and the electrochemical process is surface faradic reaction-controlled, indicating the electrode materials’ pseudocapacitive behavior.…”

“…We have calculated the slope ( b ) for the anodic and cathodic current peaks by plotting log( i ) versus log( v ), as shown in Figure b as 0.91 and 0.89, respectively, for the anodic and cathodic processes, indicating the predominant pseudocapacitive behavior of Co 3 O 4 (SCS-R). Furthermore, the contribution of pseudocapacitance and EDLC for the capacitive behavior of Co 3 O 4 (SCS-R) was analyzed using the following equation ,− i = k 1 v + k 2 v 1 / 2 where k 1 and k 2 are the constants and can be calculated from the i / v 1/2 versus the square root of the scan rate plot in Figure c. In eq , the k 1 v and k 2 v 1/2 represent the charge storage contribution from EDLC and pseudocapacitance, respectively.…”

Redox‐Active Organic Electrode Materials for Supercapacitors

“…Note that many redox molecules have the characteristics of redox transformations in electrochromic and supercapacitor devices, including polyaniline, polythiophene and their derivatives, [192] some microporous polymers such as triphenylamine (TPA)-derived polymers [193] and metallo-supramolecular polymers. [194] Although the electrochemical properties of PTh and its derivatives can be optimized by morphology and structure adjustment, they still cannot behave as well as PANI or PPy due to their rapid decay of power density and specific capacitance. To overcome these drawbacks, [195] PThs have to combine with partners such as carbon materials or other electrochemically active components to reach a better performance when used in supercapacitors (Table 7).…”

Co-containing metal–organic framework for high-performance asymmetric supercapacitors with functionalized reduced graphene oxide

“…The EDLC behavior is mainly found in high-surface-area carbonaceous-based materials like graphene nanosheets, 8 activated carbon, 9 carbon nanotubes, 10 etc . On the other hand, pseudocapacitance, which is based on the intercalation of ions in the material to store charge via a faradaic charge transfer process (reversible redox reaction), is seen in metal oxides/hydroxides, 11,12 conducting polymers, 13 metallopolymers, 14,15 etc . Although supercapacitors have a high power density, the best reported EDLC-based symmetric supercapacitors made of carbon materials suffer from lower energy density (>10 W h kg −1 ) than conventional batteries.…”