Beyond graphene foam, a new form of three-dimensional graphene for supercapacitor electrodes

Abstract

Graphene foam (GF) is a three-dimensional (3D) graphene structure that has been intensively studied as an electrode material for energy storage applications. Here we report a new design and fabrication process of an electrode material called graphene pellet (GP) for energy storage applications.

Flexible Micro‐Supercapacitor Based on Graphene with 3D Structure

“…The fabricated device is very flexible and the GP itself showed excellent electromechanical properties. As reported earlier, after 5000 bending cycles the resistance increased not more than 7.3% . The scanning electron microscopy (SEM) image in Figure a illustrates that the GP interdigitated pattern is composed a porous 3D graphene structure with interconnected flakes.…”

“…The electrical conductivity of our 3D graphene is higher than the conventional 3D graphene foam and 3D rGO . Our previous study showed that the 3D GP has a potential to significantly increase its electrical conductivity upon compression …”

“…Having all these challenges in mind, we report a simple method to fabricate and assemble micro‐supercapacitor by using monolithic 3D graphene as electrode material. The described here material called graphene pellet (GP) is different from graphene foam and has been previously reported by our group . In this work, we used polymer as a binder for the nickel catalyst particles in preparation of our 3D graphene by CVD.…”

“…The polymer binder helps to maintain the integrity of the catalyst pellet (scaffold) prior to sintering. This allowed us to prepare a large size of the Ni scaffold by simple casting of the created Ni‐PS slurry, which helped to overcome the limitations of our previously reported approach requiring compressing the Ni particles . The consolidating of the latter was achieved via thermal treatment in inert environment prior to the CVD process thus promoting sintering and interconnecting of the individual Ni particles into a monolithic catalyst structure.…”

Carbon Nanotubes Heavy Metal Detection with Stripping Voltammetry: A Review Paper

“…On the other hand, as different nanoparticles been invented and characterized, many of them are explored in various applications including electrochemistry . Since they were first discovered, carbon nanotubes (CNTs) have been attracting increased attention thanks to their excellent electrochemical properties, including wide potential window, fast electron transfer rate and large surface area . Applications with CNTs have a wide range of use, including in biomedicine, nanoelectronics, environmental engineering and electrochemical sensing .…”