Effect of supporting electrolyte on capacitance and morphology of electrodeposited poly(3,4-propylenedioxythiophene) derivatives bearing reactive functional groups

Abstract

The interactions between the electrolyte and electroactive species in redox active PProDOT derivatives can be enhanced with better-performing electrodes for electrochemical energy conversion and storage. Differently functionalized 3,4-propylenedioxythiophenes (ProDOTs) were...

Production of Pt decorated poly(3,4‐ethylenedioxythiophene)/ERGO/GCEas an efficient catalyst for methanol oxidation reaction

“…A distorted semicircle was seen in the high‐frequency region due to double‐layer capacitance and charge transfer resistance of PEDOT/ERGO coated electrode, and then in the low‐frequency region, a straight line showed mass transport and capacitive behavior where it was nearly vertical and indicated good capacitive behavior of PEDOT/ERGO coating in agreement with rectangular CV shape (see Figure 3b). 73,74 The capacitive behavior of PEDOT/ERGO was also proved by the maximum phase angle of 83° at a low frequency of 15 mHz with a plateau getting larger with increasing frequency (see inset in Figure 3d). 75 …”

“…A distorted semicircle was seen in the high-frequency region due to double-layer capacitance and charge transfer resistance of PEDOT/ ERGO coated electrode, and then in the low-frequency region, a straight line showed mass transport and capacitive behavior where it was nearly vertical and indicated good capacitive behavior of PEDOT/ERGO coating in agreement with rectangular CV shape (see Figure 3b). 73,74 The capacitive behavior of PEDOT/ERGO was also proved by the maximum phase angle of 83 at a low frequency of 15 mHz with a plateau getting larger with increasing frequency (see inset in Figure 3d). 75 Using the equivalent circuit shown in the inset of Figure 3d, the experimental impedance data were modeled based on solution resistance (R s ), charge transfer resistance (R ct ) between the polymer coated electrode and electrolyte, double layer capacitance (C dl ) and constant phase element (CPE) accounting for the electrode roughness or inhomogeneity, 76 where CPE was given by following equation (Equation 1):…”

Effect of Supporting Electrolyte on Capacitance and Impedance Properties of Electrodeposited PEDOT/ERGO Electrodes for Supercapacitor

“…Therefore, an increased current density is observed in the case of the PF 6 anion when compared to the BF 4 and ClO 4 anions, attributed to the stronger alkaline nature of PF 6 anion, facilitating the loss of H + during the polymerization process. (Sarac, et al, 2022). EDOT oxidation in 0.1 M Bu 4 NPF 6 , LiClO 4 , Et 4 NBF 4 /ACN began at 1.34, 1.30, and 1.25 V, respectively, which supposes that the oxidation of EDOT monomer in various electrolyte systems differs significantly.…”

Investigation of copper/cobaltMOFsnanocomposite as an electrode material in supercapacitors

“…The exploration of MOFs electrode type resource for supercapacitors stretched also sparked widespread attention 39‐41 . Because MOFs are typically electrically insulating, Han’s group discovered fine pseudocapacitors manners and charge custody in Co‐based MOFs as barrier for their practical traits, producing poor cadence performance and ability fading above cycles 42,43 …”

“…[39][40][41] Because MOFs are typically electrically insulating, Han's group discovered fine pseudocapacitors manners and charge custody in Co-based MOFs as barrier for their practical traits, producing poor cadence performance and ability fading above cycles. 42,43 Herein, we reported sono-chemical approach to make Cu-MOF, Co-MOF, and Cu/Co MOF nanocomposite as acting electrode materials for energy storage application. In a three-electrode assembly, electrochemical tests were performed by EIS, CV, and GCD.…”