One-Step Fabrication of Flexible, Cost/Time Effective, and High Energy Storage Reduced Graphene Oxide@PANI Supercapacitor

Abstract

The advances in micro-size and in-plane supercapacitors lead to produce the miniaturizing energy storage devices in portable and bendable electronics. Micro-supercapacitors have the unique electrochemical performance, such as high power density, fast charging, long cycle life and high safety. The reduction time and cost in fabrication processes of micro supercapacitors are important factors in micro-fabrication technology. In this work, a simple, scalable and cost-effective fabrication of interdigitated reduced graphene oxide@polyaniline flexible micro supercapacitors is presented. We found that in fabricating the interdigitated micro electrode patterns on PET substrate; the reduction of graphene oxide and growth of conducting polymer are rapidly performed simultaneously in one step by laser irradiation. The capacitance was 72 mF/cm 2 at 35µA/cm 2 current density. These highly capacitance micro supercapacitors demonstrate good stability and more than 93.5% of the capacitance retain after 1000 cycles at 0.7 mA/cm 2 current density.

Recent Advances in Graphene and Conductive Polymer Composites for Supercapacitor Electrodes: A Review

“…The largest average pore volume (0.037 cc•g −1 ) and BET surface area (m 2 •g −1 ), as well as the smallest pore radius (14.561 Å), of PANI-GO-6 seem to be the reasons for the highest specific capacitance. Many studies have been conducted in recent years using RGO to replace GO as the electrode material of SCs due to the former's greater conductivity [57,58]. In general, RGO Many studies have been conducted in recent years using RGO to replace GO as the electrode material of SCs due to the former's greater conductivity [57,58].…”

“…Many studies have been conducted in recent years using RGO to replace GO as the electrode material of SCs due to the former's greater conductivity [57,58]. In general, RGO Many studies have been conducted in recent years using RGO to replace GO as the electrode material of SCs due to the former's greater conductivity [57,58]. In general, RGO is obtained from GO and then used to compound with PANI.…”

Recent Progress in Graphene‐Based Microsupercapacitors

“…MSC delivers 72 mF cm −2 of areal capacitance with 93.5% capacitance retention even after 1000 cycles. [ 179 ] In 2018, Bai et al developed a 3D architecture planar SC by a direct ink writing of PANI/rGO composite. This novel 3D planar device delivered a high areal capacitance of 1329 mF cm −2 in H 2 SO 4 /PVA gel electrolyte; the better electrochemical performance indicates the synergistic effect of PANI/rGO [ 180 ] ( Figure 16 ).…”

Laser Synthesized Graphene and Its Applications

“…Here we observe that most devices are developed in the in-plane configuration and use an H 2 SO 4 /PVA electrolyte. For LRG, specific capacitances are reported in a 2-5 mFcm −2 range, although a significant increase is given by graphene functionalization, for example with polyaniline [75]. The range is broader for LIG, where the highest are 361 and 320 mFcm −2 .…”