Capacitive properties of promising energy storage material based on thiophene containing perylenediimide polymer

Abstract

In this study, electropolymerization of pre‐synthesized N,N′‐di‐[3‐[2‐(3‐thienyl)ethyl] phenyl] perylene‐3,4,9,10‐bis(dicarboximide) (ThPDITh) was performed on Au button electrode and the properties of the resultant polymer P(ThPDITh) were investigated by electrochemical techniques. Effect of the polymerization charge on the redox behaviors of the polymer film was investigated by cyclic voltammetry (CV) and the polymer film was further characterized by electrochemical impedance spectroscopy (EIS) measurements. Corresponding electrical equivalent circuit was applied to the experimental data to explain the electrochemical phenomenon on the interface of the Au/P(ThPDITh). In order to obtain information on the energy storage properties of P(ThPDITh) as a pseudo‐capacitive electrode material, important cell characteristics, such as redox process in anodic and cathodic potential ranges, stability of galvanostatic charge–discharge (GCD) curves, coulombic efficiency, capacitance, energy and power density values were determined. Capacitance values, obtained through different measurements (CV, EIS and GCD) are all in good agreement with each other. All the results suggested that P(ThPDITh) is capable of undergoing multiple reversible redox processes, and a good candidate for improving the capacitance and energy density of electrode material while still offering high power capability.

A Microporous Bifunctional Electrochromic Energy‐Storage Polymer of Thiophene, Triphenylamine, and Thienothiophene

“…The logarithmic relationship between I p and υ , which provides more detailed information about the energy‐storage systems, is given in Equation (1), [ 59 ] where the slope (b) is 1.0 for capacitive materials and 0.5 for battery‐type materials. Although a clear‐cut boundary is not easy to define, materials such as conductive polymers, having a “transition” area between capacitive and battery‐type behaviors, are defined as pseudocapacitive hybrid energy‐storage systems, falling into the range of 0.5–1.0 VRegarding our system, b was found to be 0.99 (Figure 3d), indicating that the P[Th 3 CNTT–TPA] film had a pseudocapacitive hybrid polymer behavior, demonstrating capacitor and battery properties together.…”

“…The regression value of the υ-I p graph was found to be higher than that of υ ½ ÀI p graph, indicating the rate controlling electrontransfer reaction of thin-film behavior of P[Th 3 CNTT-TPA] (Figure 3b,c). [52,57,58] The logarithmic relationship between I p and υ, which provides more detailed information about the energy-storage systems, is given in Equation ( 1), [59] where the slope (b) is 1.0 for capacitive materials and 0.5 for battery-type materials. Although a clear-cut boundary is not easy to define, materials such as conductive polymers, having a "transition" area between capacitive and battery-type behaviors, are defined as pseudocapacitive hybrid energy-storage systems, falling into the range of 0.5-…”

Smart copolymers of ditriphenylaminedithienothiophene with ethylenedioxythiophene for multicolor energy storage systems

“…The capacitance values of the polymers from their CV ( C CV ) measurements, were calculated using the Equation () 40,41 : where I is the current, V is the potential window, A is the electrode area, and υ is the scan rate. The results suggested that P(D1‐1E) showed the best capacitive behavior among the polymers (Figures 3B and S3).…”

“…Therefore, P(D1-1E) displayed the highest charge density, obtained from CV. The capacitance values of the polymers from their CV (C CV ) measurements, were calculated using the Equation (1) 40,41 :…”

Thiophene or Pyridine-Substituted Quinoline Derivatives: Synthesis, Properties, and Electropolymerization for Energy Storage

“…Compared to EDLC where carbon-based materials [2] are frequently adopted, pseudocapacitors and battery-type capacitors usually employ redox active species, including metal oxides [3,4] and conducting polymers as electrode material and generally show larger capacitances [5]. Among them, conducting polymers feature flexibility and easily-tailored redox properties by functionalization [6], and are utilized as electrode materials to effectively tune the achievable voltage of supercapacitors [7,8].…”