Conjunction of Conducting Polymer Nanostructures with Macroporous Structured Graphene Thin Films for High-Performance Flexible Supercapacitors

Abstract

Fabrication of hybridized structures is an effective strategy to promote the performances of graphene-based composites for energy storage/conversion applications. In this work, macroporous structured graphene thin films (MGTFs) are fabricated on various substrates including flexible graphene papers (GPs) through an ice-crystal-induced phase separation process. The MGTFs prepared on GPs (MGTF@GPs) are recognized with remarkable features such as interconnected macroporous configuration, sufficient exfoliation of the conductive RGO sheets, and good mechanical flexibility. As such, the flexible MGTF@GPs are demonstrated as a versatile conductive platform for depositing conducting polymers (CPs), e.g., polyaniline (PAn), polypyrrole, and polythiophene, through in situ electropolymerization. The contents of the CPs in the composite films are readily controlled by varying the electropolymerization time. Notably, electrodeposition of PAn leads to the formation of nanostructures of PAn nanofibers on the walls of the macroporous structured RGO framework (PAn@MGTF@GPs): thereafter, the PAn@MGTF@GPs display a unique structural feature that combine the nanostructures of PAn nanofibers and the macroporous structures of RGO sheets. Being used as binder-free electrodes for flexible supercapacitors, the PAn@MGTF@GPs exhibit excellent electrochemical performance, in particular a high areal specific capacity (538 mF cm(-2)), high cycling stability, and remarkable capacitive stability to deformation, due to the unique electrode structures.

Designing an Advanced Supercapattery Based on CuCo2S4@Ni−Mo−S Nanosheet Arrays

“…Consequently, dependable ESDs such as supercapacitors (SCs) and batteries are crucial elements to provide these energy structure developments. [1][2][3][4][5][6] SCs are considered as one of the intriguing candidates for next-generation ESDs owing to their obvious merits like considerable power density, amazing robustness, and rapid charging-discharging rate, but the relatively insignificant specific energy restricts their usages. [7][8][9][10][11] Conversely, batteries have great specific energy, but low power density.…”

Polythiophene Grafted onto Single‐Wall Carbon Nanotubes through Oligo(ethylene oxide) Linkages for Supercapacitor Devices with Enhanced Electrochemical Performance

“…[6][7] In particular, the composites consisting of conducting polymers with the carbonaceous scaffolds as the electrode materials have shown superior capacitive characteristics due to the large pseudocapacitance contribution from the reversible oxidation-reduction reactions of the conducting polymer and the capacitance of the ideal electrochemical double-layer capacitance from the carbonaceous materials. [8][9][10][11][12] As a relatively new type of electrically conducting polymers, polythiophene and its derivatives feature of relatively low cost, high unique redox states, high charge mobility, and moderate band gap [13][14] over conventional conducting polymers, such as PANI and PPy. Many efforts have been made to fabricate polythiophene/carbon hybrid electrode materials, such as PTh coated onto multiwalled carbon nanotubes (MWCNTs) composite, [15] poly (3,4-ethylenedioxythiophene) doped with graphene oxide (PEDOT-GO) composite, [16] poly(3-methylthiophene) co-doped with graphene and single-walled carbon nanotube (SWCNTs) forming a ternary nanocomposite, [17] PTh modified coral-like monolithic carbon, [18] and PTh derivative grown on GO nanosheets, [19] etc.…”

Synthesis and Characterization of Nanosize Polyanthranillic Acid for Solid Polymer Electrolyte

“…Conducting polymers provide the advantages of chemical diversity, low density, flexibility, corrosion resistance, easy-to-control shape and morphology, and tunable conductivity over their existing inorganic counterparts [1,2]. Successful preparations of conducting polymers composites with high mechanical stabilities, flexibilities, and conductivities have proven that conducting polymers can serve as key material components in light emitting diodes [3,4], transistors [5], electrochromic devices [6,7], actuators [8], electrochemical capacitors [9,10], photovoltaic cells [11,12], and sensors [13,14]. Conducting polymer-modified electrodes have been widely investigated because of their potential applicationin areas such as electrocatalysis [15], sensors [16], corrosion [17], batteries [18], electronic displays, and devices [19].…”