Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 2, Issue 8, Pages 2293-2300Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am100343a
Keywords
highly aromatic graphene; electronic properties; electrochemical capacitors; binder-free electrode; multilayer free-standing film; aligned nanostructure
Funding
- Michigan Economic Development Corporation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0922999] Funding Source: National Science Foundation
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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.
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