High Performance of Supercapacitor from PEDOT:PSS Electrode and Redox Iodide Ion Electrolyte

Gao, Xing; Zu, Lei; Cai, Xiaomin; Li, Ce; Lian, Huiqin; Liu, Yang; Wang, Xiaodong; Cui, Xiuguo

doi:10.3390/nano8050335

Cited by 38 publications

(25 citation statements)

References 49 publications

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“…A PEDOT:PSS binder disintegrates in a water stream and, hence, EDLCs with coating electrodes with PEDOT:PSS binder can be recycled according to proposed protocols [24] based on liquid processing [25,26] and separation methods [27]. PEDOT:PSS pseudocapacitors have typically aqueous electrolytes, such as 1 M H 2 SO 4 [28] or H 3 PO 4 /PVA gel electrolyte [29,30]. It has been reported [31] that their pseudocapacitance is due to the following reversible redox process between PEDOT:PSS and the H + ion of an aqueous acid electrolyte:…”

Section: Introductionmentioning

confidence: 99%

Electrochemical double-layer capacitors with lithium-ion electrolyte and electrode coatings with PEDOT:PSS binder

2020

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Although typical electrochemical double-layer capacitors (EDLCs) operate with aqueous or lithium-free organic electrolytes optimized for activated carbon electrodes, there is interest in EDLCs with lithium-ion electrolyte for applications of lithium ion capacitors and hybridized battery-supercapacitor devices. We present an experimental study of symmetric EDLCs with electrolyte 1 M LiPF6 in EC:EMC 50:50 v/v and electrode coatings with 5 wt% SBR or PEDOT:PSS binder at 5 or 10 wt% concentration, where for the PEDOT:PSS containing electrodes pseudocapacitance effects were investigated in the lithium-ion electrolyte. Two different electrode coating fabrication methods were explored, doctor blade coating and spraying. It was found that EDLCs with electrodes with either binder had a stability window of 0–2 V in the lithium-ion electrolyte. EDLCs with electrodes with 10 wt% PEDOT:PSS binder yielded cyclic voltammograms with pseudocapacitance features indicating surface redox pseudocapacitance in the doctor blade coated electrodes, and intercalation and redox phenomena for the sprayed electrodes. The highest energy density in discharge was exhibited by the EDLC with doctor blade-coated electrodes and 10 wt% PEDOT:PSS binder, which combined good capacitive features with surface redox pseudocapacitance. In general, EDLCs with sprayed electrodes reached higher power density than doctor blade coated electrodes. Graphic abstract

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Section: Introductionmentioning

confidence: 99%

Electrochemical double-layer capacitors with lithium-ion electrolyte and electrode coatings with PEDOT:PSS binder

2020

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“…Recently the interest in polyiodide chemistry was revitalized by their redox properties. Due to the versatility of redox reactions of iodine species the organic iodide salts are used as electrolytes and redox mediators for dye sensitized solar cells, anions of ionic liquids, energy storage agents (light–induced formation of I−I bonds), proton sponges, in electrocatalytic reduction of triiodide, lithium‐iodide batteries, lithium‐sulfur batteries, supercapacitors, charge‐transfer and mixed‐valence salts . Iodine species were also considered as dopants of polymers and graphene .…”

Section: Introductionmentioning

confidence: 99%

Triiodide Organic Salts: Photoelectrochemistry at the Border between Insulators and Semiconductors

et al. 2018

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The intriguing properties of triiodide organic salts ([(C6H5)3AsO]2H+I3−, (C6H5CH2)3NH+I3− ⋅C6H5CH3, and [(C6H5CH2)3NO]2H+I3−) have been analyzed in detail using experimental and theoretical techniques. The analysis of crystal structures, density of states distribution and photocurrent generation of this purely ionic materials indicates insulating character of the ground state, whereas semiconducting character in higher excited states is observed. These peculiar properties of the studied compounds are the consequence of a specific electronic structure: very flat dispersion diagrams of the valence and conduction band and highly dispersive character on the higher conduction band. Weak triiodide‐triiodide interactions play the key role in the visible absorption range of these salts, while the charge transfer involving high energy carbon‐centered states is responsible for photocurrent generation. The complexity of the electrochemical reactions and the interactions of the I3− anion with light, solubility in organic solvents and the simplicity of preparation make these materials interesting candidates for application in unconventional optoelectronic devices.

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“…Recently, a class of electrochemical supercapacitors (SC) based on conducting polymers (CP) has gained much attention in the research community owing to the abundance of the constituent materials, outstanding mixed ion-electron conductivity and high volumetric capacitance values 1,2 . Due to its remarkable cycling stability and high mixed conductivity, the organic conjugated polymer poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) has been investigated in many SC settings; as freestanding 3,4 films, mixed with different forms of carbon/cellulose 5,6 to promote high surface area, and in combination with redox molecules/biopolymers [7][8][9][10][11] for higher energy density. However, achieving high energy density with good cycling stability in PEDOT:PSS-based SCs is limited as most of the previous works utilizes aqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Modelling of heterogeneous ion transport in conducting polymer supercapacitors

et al. 2021

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High Performance of Supercapacitor from PEDOT:PSS Electrode and Redox Iodide Ion Electrolyte

Cited by 38 publications

References 49 publications

Electrochemical double-layer capacitors with lithium-ion electrolyte and electrode coatings with PEDOT:PSS binder

Electrochemical double-layer capacitors with lithium-ion electrolyte and electrode coatings with PEDOT:PSS binder

Triiodide Organic Salts: Photoelectrochemistry at the Border between Insulators and Semiconductors

Modelling of heterogeneous ion transport in conducting polymer supercapacitors

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