Flexible Supercapacitor Based on Inkjet‐Printed Graphene@Polyaniline Nanocomposites with Ultrahigh Capacitance

Abstract

This work describes the fabrication of high‐performance all‐solid‐state supercapacitors based on covalently‐anchored reduced graphene oxide (RGO)@polyaniline (PANI) composites via an inkjet printing method. Morphological and chemical characterization data show that PANI nanoparticles are immobilized on graphene oxide (GO) nanosheets via covalent bonds. Sandwich‐structured and interdigitated supercapacitors are fabricated by printing the as‐prepared GO@PANI composites on flexible substrates, followed by a chemical reduction. The devices display high volumetric capacitances (258.5 F cm−3 at 1 mV s−1 for sandwich‐structured ones and 554 F cm−3 at 1 mV s−1 for interdigitated ones) and excellent cycling retention (2000 cycles >90%). Moreover, at the bending state, there are no significant changes on the device capacitances, indicating their great flexibility. The high‐performance devices can be further designed to produce special geometries and patterns. The work may provide a novel strategy to fabricate RGO@PANI composite‐based supercapacitors, which allows the end users to precisely deposit active materials according to their designs, for miniature and wearable electronics.

A Reactive Template Synthesis of Hierarchical Porous Carbon and Its Application to Supercapacitor Electrodes

“…[1][2][3][4][5] Based on unit components and energy storage mechanism, the electrode material is one of the key factors determining the performance of supercapacitors. [6][7][8][9] Thus, it is porosity, in which the carbon precursor, hard template and activator were glucose (G), basic zinc carbonate (BZC), and potassium carbonate (PC), respectively. The effects of BZC and PC on the morphology, microstructure, textural properties, carbon structure and supercapacitor performance of the resultant HPCs were investigated and discussed.…”

“…[ 1–5 ] Based on unit components and energy storage mechanism, the electrode material is one of the key factors determining the performance of supercapacitors. [ 6–9 ] Thus, it is highly in demand for rationally designing and tailoring the physicochemical properties of electrode materials to enhance their electrochemical capabilities.…”

Graphite nanosheet/polyaniline nanocomposites: Effect of in situ polymerization and dopants on the microstructure, thermal, and electrical conduction properties

“…Due to promising battery applications, [1][2][3][4][5] electromagnetic shielding, [6][7][8][9] actuators, [10][11][12][13] energy storage systems, [14][15][16][17][18][19][20][21] and other functional applications, [22][23][24][25][26][27][28][29] the study and development of composites and nanocomposites using intrinsically conducting polymers (ICP) as a matrix and some carbon allotropes, such as graphite, 12,13,27,28 graphene, 2,5,7,18,20 carbon black, 3,30,31 fullerenes, 19,32 and carbon nanotubes, 4,29,[33][34][35] has been intensifying in the literature. The function of ICP is to improve the contact between the particles or nanoparticles of inclusion, creating a three-dimensional network of conduction in the material.…”

Electrochemical fabrication of polyaniline/graphene paper (PANI/GP) supercapacitor electrode materials on free-standing flexible graphene paper

“…13 Attributing to their large specific surface area, easily accessible electrode surface and high mechanical strength, 14 GO and its reduced product are widely used in EDLC. 15 As another supercapacitor, the energy storage of pseudocapacitor depends on the electrochemical reaction of active components. The reaction is no longer limited to the surface of the electrode material, but can be carried out in the entire electrode material (including the inner body and the outer surface).…”