Recent Development of Polyaniline/graphene Composite Electrodes for Flexible Supercapacitor Devices

Abstract

Flexible supercapacitors are attracting interest in wearable technologies as they can withstand mechanical deformations while delivering their energy storage function. Among frequently investigated electrode materials for flexible supercapacitors, polyaniline/graphene composites are favorable due to their synergistic properties that assure excellent specific capacitance, cycling stability, and high rate capability. This review highlights recent strategies to advance structural designs and synthesis methods of polyaniline/ graphene electrodes for flexible supercapacitors. Firstly, the general mechanism and feature of the flexible supercapacitor will be discussed, followed by current challenges that focus on two key aspects, structural design and synthesis of the electrode. Next, by sorting the composites based on their morphological dimensionalities (i. e., one-, two-, and threedimensional), and focusing the discussion on the two key aspects, we evaluate recent and effective strategies to develop flexible supercapacitors with polyaniline/graphene composite electrode. Finally, future perspectives are given for broader applications of the flexible supercapacitors.

A Parchment‐Like Supercapacitor Made with Sustainable Graphene Electrodes and its Enhanced Capacitance by Incorporation of the LaSrCoO3 Perovskite

“…Nyquist graphs for both devices are shown together in Figure 5d. According to the reports in the literature, Nyquist graphs provide information on the equivalent series resistance R s and the charge transfer resistance R ct of the equivalent circuit shown in the inset of Figure 5d [4,15] . The R s values for the TiNiG‐SC and TiNiG/LSC‐SC devices were 39.4 Ω and 7.9 Ω, respectively.…”

“…According to the reports in the literature, Nyquist graphs provide information on the equivalent series resistance R s and the charge transfer resistance R ct of the equivalent circuit shown in the inset of Figure 5d. [4,15] The R s values for the TiNiG-SC and TiNiG/LSC-SC devices were 39.4 Ω and 7.9 Ω, respectively. This suggests that the introduction of LSC particles to the SC electrodes reduces the overall internal resistance of the device.…”

“…Particularly, the flexible supercapacitors (SCs) are of wide interest in wearable applications because they can withstand mechanical deformations while delivering their energy. Also, they have long lifetimes, tunable power density and can be charged/discharged thousands of times with a minimum loss of efficiency (<8 %) [1,4] . Some examples of reports about flexible supercapacitors are: Na et al [5] .…”

“…Also, they have long lifetimes, tunable power density and can be charged/ discharged thousands of times with a minimum loss of efficiency (< 8 %). [1,4] Some examples of reports about flexible supercapacitors are: Na et al [5] reported a fiber-type solid state SC which was not only flexible but also supported a very high tensile strength of 492.8 MPa while producing a capacitance of 151.1 F g À 1 . Moreover, a flexible SC reported by Zheng et al [6] was able to produce a capacitance of 252 F g À 1 at a very low temperature of À 65 °C.…”

Zwitterionic Bergman-Triggered Cascade Polymerization: A Plateau Reaction Leading to Metal-Graphene Nanoribbon Semiconductors Using Boron-Metal Couple

“…As we approach the quantum limit of silicon-based semiconductors, the discovery of unique electronic properties of graphene offered a lucrative alternative. In recent years, graphene-based materials have been the focus of intense research due to their application in solar cells, 1,2 organic light emitting diodes (OLEDs), 3 bioengineering, 4,5 drug and gene delivery system, 6,7 composite materials, 8 and energy storage devices. 9,10 However, despite the extraordinary mechanical and optoelectronic properties, the vanishing bandgaps in graphenes limit their scope to replace the silicon-based semiconductors.…”