Flexible supercapacitors, a state-of-the-art material, have emerged with the potential to enable major advances in for cutting-edge electronic applications. Flexible supercapacitors are governed by the fundamentals standard for the conventional capacitors but provide high flexibility, high charge storage and low resistance of electro active materials to achieve high capacitance performance. Conducting polymers (CPs) are among the most potential pseudocapacitor materials for the foundation of flexible supercapacitors, motivating the existing energy storage devices toward the future advanced flexible electronic applications due to their high redox active-specific capacitance and inherent elastic polymeric nature. This review focuses on different types of CPs-based supercapacitor, the relevant fabrication methods and designing concepts. It describes recent developments and remaining challenges in this field, and its impact on the future direction of flexible supercapacitor materials and relevant device fabrications.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/ese3.50

Conducting polymer-based flexible supercapacitor

Graphene–polyethylenedioxythiophene conducting polymer nanocomposite based supercapacitor

A sweat-based flexible supercapacitor (SC) for self-powered smart textiles and wearable systems is presented. The developed SC uses sweat as the electrolyte and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the active electrode. With PEDOT:PSS coated onto cellulose/polyester cloth, the SC shows specific capacitance of 8.94 F g-1 (10 mF cm-2 ) at 1 mV s-1 . With artificial sweat, the energy and power densities of the SC are 1.36 Wh kg-1 and 329.70 W kg-1 , respectively for 1.31 V and its specific capacitance is 5.65 F g-1 . With real human sweat the observed energy and power densities are 0.25 Wh kg-1 , and 30.62 W kg-1 , respectively. The SC performance is evaluated with different volumes of sweat (20, 50, and 100 µL), bending radii (10, 15, 20 mm), charging/discharging stability (4000 cycles), and washability. With successful on-body testing, the first demonstration of the suitability of a sweat-based SC for self-powered cloth-based sensors to monitor sweat salinity is presented. With attractive performance and the use of body fluids, the presented approach is a safe and sustainable route to meet the power requirements in wearable systems.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/adma.201907254

A Wearable Supercapacitor Based on Conductive PEDOT:PSS-Coated Cloth and a Sweat Electrolyte.

The advent of ionic liquids (ILs) as eco-friendly and promising reaction media has opened new frontiers in the field of electrochemical energy storage Beyond their use as electrolyte components in batteries and supercapacitors, ILs have unique properties that make them suitable as functional advanced materials, media for materials production, and components for preparing highly engineered functional products Aiming at offering an in-depth review on the newly emerging IL-based green synthesis processes of energy storage materials, this Review provides an overview of the role of ILs in the synthesis of materials for batteries, supercapacitors, and green electrode processing It is expected that this Review will assess the status quo of the research field and thereby stimulate new thoughts and ideas on the emerging challenges and opportunities of IL-based syntheses of energy materials

Energy Storage Materials Synthesized from Ionic Liquids

Supercapacitors, as one of the energy storage devices, exhibit ultrahigh capacitance, high power density, and long cycle High specific surface area, mechanical and chemical stability, and low cost are often required for supercapacitor materials Graphene, as a new emerging carbon material, has attracted a lot of attention in energy storage field due to its intrinsic properties Polymers are often incorporated into graphene for a number of enhanced or new properties as supercapacitors In this paper, different polymers which are used to form composite materials for supercapacitor applications are reviewed The functions, strategies, and the enhanced properties of graphene and polymer composites are discussed Finally, the recent development of graphene and polymers for flexible supercapacitors are also discussed

/pdf/graphene-and-polymer-composites-for-supercapacitor-4zgwk914y3.pdf

Graphene and Polymer Composites for Supercapacitor Applications: a Review

Electropolymerization of high stable poly(3,4-ethylenedioxythiophene) in ionic liquids and its potential applications in electrochemical capacitor

Nano-pit corrosion of the tabs in aluminum electrolytic capacitor: Polarization characteristics of the tabs in ethyleneglycol–borate solution with chloride ions

The invention relates to poly (3, 4-ethylenedioxy thiophene) conductive polymer, which is p-type doped polymer prepared by electropolymerization of 3, 4-ethylenedioxy thiophene monomer, adoption of 1-methyl-3-butyl imidazole tetrafluoborate as electrolyte and dopant, and utilization of the potentiostatic method. The structure of the poly (3, 4-ethylenedioxy thiophene) conductive polymer is a porous structure the surface of which is formed by accumulation of a plurality of particles between 800 nanometers and about 2 micrometer. The specific capacitance of the poly (3, 4-ethylenedioxy thiophene) conductive polymer reaches 113 to 158 F/g, and the cyclical stability can reach 70000 times. The invention discloses a method for manufacturing the same.

P-type doped poly (3,4-ethylene dioxy thiophen ), preparation thereof and use

1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), one kind of ionic liquids, has been used as electrolyte to electropolymerize soluble conducting polymer, poly(3,4-ethylenedioxythiophene) (PEDOT). This polymer with the particles size of several hundred nanometres in diameter has a porous structure and can be solubilized in acetonitrile, acetone, chloroform and other organic solvents, but it is insoluble in water. Moreover, it displays fluorescence in a wide wavelength region.

Electrochemical synthesis of acetonitrile-soluble poly(3,4-ethylenedioxythiophene) in ionic liquids and its characterizations.

The invention relates to an organic soluble poly(3,4-ethylene dioxythiophene) which is a soluble conductive polymer that is electrically polymerized by the monomer of 3,4-ethylene dioxythiophene, mixed with an inorganic ion of tetrafluoroborate, provided with a nano particle piling structure, is soluble to an apolar aprotic organic solvent and is provided with a spectroscopic property of full fluorescence. The organic soluble poly (3, 4-ethylene dioxythiophene) detected by a fluorescence inverted microscope respectively emits four different fluorescences of red, lake blue, navy blue and yellow under four different excitation lights. The acetonitrile liquid thereof detected by a fluorescence spectrum has emission of different degrees within a nano range of 380 to 900; therefore, the organic soluble poly (3, 4-ethylene dioxythiophene) can be used for preparing fluorescence induction materials. The invention discloses a preparation method thereof.

Rong Xue

Papers

Electropolymerization of high stable poly(3,4-ethylenedioxythiophene) in ionic liquids and its potential applications in electrochemical capacitor

Nano-pit corrosion of the tabs in aluminum electrolytic capacitor: Polarization characteristics of the tabs in ethyleneglycol–borate solution with chloride ions

P-type doped poly (3,4-ethylene dioxy thiophen ), preparation thereof and use

Electrochemical synthesis of acetonitrile-soluble poly(3,4-ethylenedioxythiophene) in ionic liquids and its characterizations.

Organic solvent soluble poly (3,4- ethylenedioxythiophene), preparation and use thereof