A high-performance electrode based on reduced graphene oxide/lignosulfonate/carbon microspheres film for flexible supercapacitors

Abstract

Reduced graphene oxide (RGO) flexible film pillared with lignosulfonate (LS) and carbon microspheres (CM) was fabricated via a facile vacuum-filtration process to serve as a high-performance electrode material for supercapacitors. Composite electrodes comprising graphene and biomass materials have the advantages of being flexible, lightweight, cheap, and environmentally friendly. The addition of LS and CM between the RGO layers mitigated the self-restacking of reduced graphene oxide flakes. Composite film electrode displayed a high specific capacitance of 641 mF cm-2 at 0.2 mA cm-2, which was much higher than that of the RGO film (117.9 mF cm-2). The present findings indicate a great potential of the graphene films composited with biomass materials in fabricating flexible supercapacitor electrodes.

Template synthesis of nitrogen self-doped hierarchical porous carbon with supermicropores and mesopores for electrical double-layer capacitors

“…As the scanning rate was increased, the profiles maintained a roughly rectangular shape except for an increasingly apparent distortion, indicating an increased diffusion resistance at a high scanning rate. It is deduced that the diffusion of electrolyte ions at high scanning rate may be restricted by the relatively narrow pore channel attributed to the small sized mesopores (Ren et al 2022). The GCD profiles of BDPC electrodes obtained at the current density of 1 A/g over the potential window of -0.9 to 0.1 V (vs. Hg/HgO) are shown in Fig.…”

Synthesis and Characterization of Thermally Stable Lignosulfonamides

“…This year only, researchers have described the application of lignosulfonates and other technical lignins to obtain high-efficien absorbents for the removal of Au(III) [ 51 ], Cr(VI) [ 52 ], Cu(II) [ 53 ], Co(II) [ 54 ], or Pb(II) [ 55 ] ions, amine-functionalized lignins [ 56 ] and magnetic lignosulfonate-based adsorbents for the selective removal of dyes [ 57 ] and other wastewater contaminants [ 58 ], just to name a few. Recent studies are not limited only to sorbents—lignin is a versatile starting material, which can be used to create hydrogels for capacitor and sensor applications [ 59 , 60 ], efficient photoinitiators [ 61 ], or can become a cross-linker for bioprosthetic materials of heart valves [ 62 ]. The biomedical field also encompasses drug delivery systems, such as pH-responsive systems based on lignosulfonates [ 63 ].…”

Highly Flexible and Conductive Electrodes through Combining Honeycomb and Butterfly Pattern Bio‐Inspired Structure for ECG Signal Recording

“…Emergence of the issue will seriously shorten the service life of flexible electrode in flexible electronic equipment. [22][23][24][25][26] Consequently, a key challenge for designing independent high-performance electronic equipment is developing stretchable electrodes that can maintain metal film structural integrity during repeated severe deformations.The negative Poisson's ratio (NPR) structure has been successfully employed in flexible electronic, biomedicine, sensor Recent advances in the development of flexible electronic devices have increased the demand for flexibility and conductivity. However, there is still a significant challenge to manufacture flexible electrodes featuring satisfactory mechanical and conductivity performance simultaneously.…”

“…Emergence of the issue will seriously shorten the service life of flexible electrode in flexible electronic equipment. [22][23][24][25][26] Consequently, a key challenge for designing independent high-performance electronic equipment is developing stretchable electrodes that can maintain metal film structural integrity during repeated severe deformations.…”