Multilayered nano-architecture of variable sized graphene nanosheets for enhanced supercapacitor electrode performance.
The diverse physical and chemical aspects of graphene nanosheets such as particle size surface area and edge chemistry were combined to fabricate a new supercapacitor electrode architecture consisting of a highly aligned network of large-sized nanosheets as a series of current collectors within a multilayer configuration of bulk electrode. Capillary driven self-assembly of monolayers of graphene nanosheets was employed to create a flexible, multilayer, free-standing film of highly hydrophobic nanosheets over large macroscopic areas. This nanoarchitecture exhibits a high-frequency capacitative response and a nearly rectangular cyclic voltammogram at 1000 mV/s scanning rate and possesses a rapid current response, small equivalent series resistance (ESR), and fast ionic diffusion for high-power electrical double-layer capacitor (EDLC) application.
Biswas
Sanjib
S
Department of Chemical Engineering and Materials Science and Composite Materials and Structures Center, Michigan State University, East Lansing, Michigan 48824-1226, USA.
Drzal
Lawrence T
LT
D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D004553:Electric Conductivity; D004566:Electrodes; D057927:Hydrophobic and Hydrophilic Interactions; D036103:Nanotechnology / Q000379:methods*; D014867:Water / Q000737:chemistry
D014867:Water; D002244:Carbon