Schematic of a supercapacitor cell: (a) casing, (b) separator membrane (exaggerated), (c) collector plate, and (d) nanomaterial electrode.
Single-walled carbon nanotubes: (a) mat of nanowires, and (b) ∼80 μm tall tower. Images courtesy of Vijay Chetty and Lance Delzeit.
Multiwall carbon nanotubes grown directly on a metal substrate by CVD. Image courtesy of Cattien Nguyen.
(a) Graphene produced by chemically-reduced graphene oxide. Image courtesy of Vimlesh Chandra. (b) Vertical, few layer graphene grown by PECVD. Image courtesy of Emil Sandoz-Rosado and Mike Oye.
(a) Vertical ZnO nanowires grown on a metal substrate. Image courtesy of Mike Oye. (b) Bulk-produced ZnO nanowires using a microwave plasma reactor. Image courtesy of Mahendra Sunkara.
Cyclic voltmmograms at different scan rates for a EDLC with carbon nanotube electrodes. Reproduced with permission from Du et al., Nanotechnology 16, 350 (2005). Copyright © 2005 by IOP Publishing.
Charge/discharge cycles at a constant current of 10 mA for the same device as in Fig. 6 . Reproduced with permission from Du et al., Nanotechnology 16, 350 (2005). Copyright © 2005 by IOP Publishing.
Comparison of capacitors, batteries, and supercapacitors.
Comparison of EDLC efforts using carbon nanotubes in the literature.
Graphene based EDLCs.
Redox Supercapacitors using nanomaterials.
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