Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 26, Pages 9964-9969Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta01785d
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Funding
- AFOSR [FA9550-11-1-0192]
- National Science Foundation [ECS-0335765, DMR-0819762]
- U.S. Army Research Office [W911NF-07-D-0004]
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An asymmetric supercapacitor, exploiting ultra-high density aligned activated graphene flakes as the positive electrode and nm-scale conformal coating of a conducting polymer poly(ethylenedioxythiophene) on aligned carbon nanotubes as the negative electrode, is introduced. By complementary tailoring of the asymmetric electrodes, the layered device exhibits a wide 4 V electrochemical window, with the highest power density (149 kW L-1) and energy density (113 Wh L-1) reported thus far for carbon-based supercapacitors.
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