Laser-Assisted Fabrication of Nanostructured Substrate Supported Electrodes for Highly Active Supercapacitors

Abstract

Supercapacitors (SCs) have attracted great attention as renewable energy storage devices due to their high power densities and cost effectiveness. In this work, a one-step method is reported to fabricate the laser scribed SC using laser reduced Polyimide (LRPI) electrodes as a substrate. An Iono-gel polymer electrolyte based on polyvinyl alcohol, potassium hydroxide and 1-Butyl-3-methyl imidazolium Bromide ([Bmim]Br) was utilized because of its wider voltage window, good ionic conductivity and better adhesion with electrode material. The assembled device exhibited an excellent specific capacitance of 2.19 mFcm −2 at a maximum current density of 0.263 mAcm −2. The energy density is measured to be 1.21 µWhcm −2 , which is much higher than a usual capacitor. Given these electrochemical properties, a cost-effective one-step method and scalable approach provides a strategy to fabricate lightweight, stretchable and flexible supercapacitors for future microscale energy storage devices i.e., flexible displays, electrical sensors and wearable electronics.

Enhancing supercapacitor performance through design optimization of laser-induced graphene and MWCNT coatings for flexible and portable energy storage

“…Our experimental results, obtained from galvanostatic charge-discharge (GCD) and cyclic voltammetry (CV) measurements at a current density of 0.2 mA/cm 2 and a scan rate of 2 mV/s, show a capacitance of 11.17 and 51 mF/cm 2 , respectively. These values are higher than those reported in previous studies 27,28,43 , and are summarized in Table 2. Coating multi-walled carbon nanotubes (MWCNTs) on electrodes reduces the charge transfer resistance between the electrolyte ions and the electrode, resulting in an enhanced energy density.…”

“…where B 1/2 (radians) is the FWHM for peak (002) and λ = 1.54 A ° (Cu kα source of XRD). L c for LIG and LIG-2mg MWCNT coated is 24 nm and 21 nm, respectively 43,44 _ENREF_26. Overall, the XRD pattern of LIG-MWCNT confirms the successful formation of graphene-like structures and the coating of MWCNTs onto the LIG, which can have potential applications in various fields, such as energy storage, sensing, and catalysis.…”

“…The analysis revealed that the PI film had a more compact structure and a smoother surface than LIG. On the other hand, LIG had a surface dominated by islands, and an overall increase in surface roughness is attributed to the laser treatment and subsequent polymer-to-graphitic carbon conversion 43 . The intensity of spikes on the surface increased after photoexcitation.…”

Experimental and Computational Analysis of MnO2@V2C-MXene for Enhanced Energy Storage

“…Two-dimensional (2D) materials involve uncommon and rare electronic, mechanical as well as optical properties [ 1 , 2 , 3 , 4 , 5 ], that have led to its wide-ranging analysis for versatile applications in the past decade. In addition, they aid to an expedient building block for diverse layered structures, membranes and composites [ 6 , 7 , 8 , 9 , 10 ]. MXenes—the fresh and newest accoutrement to the world of 2D materials—are basically early transition metal carbides, nitrides and carbonitrides [ 11 , 12 , 13 , 14 , 15 ].…”

GQD-PAN-based high-performance supercapacitor: an approach towards wealth from waste

“…Fig.7(A) Three-electrode system areal capacitance, energy density and power density literature survey 82-91 compared with 0.4 mg and 0.1 mg GQD-coated cPAN electrodes. (B) Literature survey of areal capacitance, energy density and power density of the two-electrode system[92][93][94][95][96][97][98][99][100][101][102][103] compared with the 0.1 mg GQD-coated coin cell fabricated in this work.…”