Improving the fabrication of all-polythiophene supercapacitors

Abstract

Abstract. The influence of the preparation method in the properties of poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes used to manufacture organic energy storage devices, as for example supercapacitors, have been examined by considering a reduction of both monomer and supporting electrolyte concentrations during the anodic polymerization reaction. Thus, the excellent electrochemical properties of PEDOT films prepared using quiescent solutions have been preserved by applying controlled agitation to the polymerization process, even though the concentration of monomer and supporting electrolyte were reduced 5 and 2 times, respectively. For example, the charge stored for reversible exchange in a redox process, the electrochemical stability and the current productivity of films achieved using quiescent solutions have been preserved using a dynamic reaction medium in which the concentrations of monomer and supporting electrolyte are several times lower. The excellent properties of PEDOT electrodes prepared using optimized dynamic conditions have also been proved by constructing a symmetric supercapacitor. This energy storage device, which has been used as power source for a LED bulb, is rechargeable and exhibits higher chargedischarge capacities than supercapacitors prepared with electrodes derived from quiescent solutions. In addition of bring an efficacious procedure for preparing costeffective PEDOT films with excellent properties, the proposed dynamic conditions reduce the environmental hazards of depleted reaction media.

Flexible Electrodes for Supercapacitors Based on the Supramolecular Assembly of Biohydrogel and Conducting Polymer

“…The electroactivities, which were quantified as the voltammetric stored charge per surface unit ( Q ), and the areal specific capacitances (SC, eq ) of γ-PGA, PEDOT/γ-PGA, and [PEDOT/γ-PGA]­PHMeDOT­(θ = 6 min) are listed in Table . Consistent with the voltammograms displayed in Figure a, the electrochemical properties of the three systems were lower than those typically obtained for CPs. , More specifically, the values of Q and SC determined for PEDOT films prepared using identical experimental conditions are 4.25 × 10 –2 C/cm 2 and 27 mF/cm 2 , respectively.…”

“…Consistently with the voltammograms displayed in Figure 7a, the electrochemical properties of the three systems were lower than those typically obtained for CPs. 53,57 More specifically, the values of Q and SC determined for PEDOT films prepared using identical experimental conditions are 4.25•10 -2 C/cm 2 and 27 mF/cm 2 , respectively.…”

“…Consistent with the voltammograms displayed in Figure 7a, the electrochemical properties of the three systems were lower than those typically obtained for CPs. 53,57 More specifically, the values of Q and SC determined for PEDOT films prepared using identical experimental conditions are 4.25 × 10 −2 C/cm 2 and 27 mF/cm 2 , respectively. Enlargement of the PHMeDOT polymerization time from θ = 6 min to t = 7 h causes a remarkable improvement of the electrochemical properties, which is reflected by the gain in both the cathodic and anodic areas of the recorded voltammogram (Figure 7a).…”

Three-dimensional design and fabrication of reduced graphene oxide/polyaniline composite hydrogel electrodes for high performance electrochemical supercapacitors

“…Electric double layer capacitors deposit energy by electrostatic charge accumulation at the Helmholtz plane, while the capacitances of redox pseudo-capacitors are mainly due to redox reactions at electrode surfaces [3,4]. Conducting polymers (CPs), such as polypyrrole [5,6], polythiophene [7,8] and polyaniline [9,10] have been intensively studied for the past 40 years. Polyaniline (PANI) is one of the most widely used CPs due to its environmental and chemical stability, facile synthesis, tunable conductivity, and good potential capacity for energy storage [11][12][13].…”

Optimization of an Electrochemical Sensor for Determination of Imidacloprid Based on β‐cyclodextrin Electropolymerization on Glassy Carbon Electrode

“…Also, the agitation can alter the electropolymerization process affecting the organization and growing of polymer chain. Thus, the increasing in the transport rate caused by agitation, which accelerates the electropolymerization process, can optimize the wielding . Consequently, the condition of the electropolymerization solution can affect directly the polymeric films properties.…”