Vertically Oriented Graphene Bridging Active‐Layer/Current‐Collector Interface for Ultrahigh Rate Supercapacitors

Abstract

Dense networks of graphene nanosheets standing vertically on a current collector can work as numerous electrically conductive bridges to facilitate charge transport and mitigate the constriction/spreading resistance at the interface between the active material and the current collector. The vertically oriented graphene-bridged supercapacitors present excellent rate and power capabilities.

Review—Critical Considerations of High Quality Graphene Synthesized by Plasma-Enhanced Chemical Vapor Deposition for Electronic and Energy Storage Devices

“…The critical issue of contact resistance in a supercapacitor has been solved by Bo et al 156 by building bridges of vertical graphene (VG) nanosheets between the current collector and active materials. The "bridges" was constructed by directly grown VG nanosheets on the M3044 ECS Journal of Solid State Science and Technology, 6 (6) M3035-M3048 (2017) surface of nickel foam current collector by PECVD process.…”

Graphene as Sensitizer

“…Therefore, suitable materials such as graphene are required to be used as a desired current collector. The advantages of graphene in terms of the nature of the material (excellent electrons transport, thermodynamic stability, surface wettability, and high electrical conductivity) and better surface contact (including graphene/electrolyte and graphene/active material) make it suitable to be used as the current collector [22,23]. However, the main factor that influences many energy devices is the excellent electron transport along the atomically thin layer.…”

Preparation of graphene oxide/multiwalled carbon nanotubes 3D flexible architecture for robust biosensing application

“…However, the conventional synthetic GO is always a twodimensional sheet and hard to connect each other to form a stable architecture [11]. It is failed to provide desired space environment for efficient biomolecules immobilization and liquid diffusion, meanwhile, the poor conductivity prevents the effective signal transformation.…”