Electrochemical Charge Storage in Hierarchical Carbon Manifolds
Document Type
Conference Proceeding
Publication Date
6-2-2016
Abstract
The use of hierarchical assemblies constituted from macroporous structures (e.g., reticulated vitreous carbon, RVC) where the internal pore area is covered with closely spaced nanostructures (e.g., carbon nanotubes, CNT) is proposed for substantially enhancing the energy density of electrochemical capacitors, while maintaining large charge/discharge rates. While the macroscale pores enable storage of substantial electrolyte volumes that would contribute through redox reactions to the energy density, the closely spaced nanostructures provide a large geometric area and capacitance in addition to enabling rate independent Faradaic charge storage via thin layer electrochemistry (TLE). A fifty fold increase in the double layer capacitance, in addition to increased Faradaic charge density – with potential for orders of magnitude improvement, was observed for the RVC-CNT electrodes, in comparison to the bare RVC foam electrode. It was seen that the hierarchical assembly enables the contribution from ~ 94% of the net volume of the wetted RVC-CNT electrode for active Faradaic charge storage.
Repository Citation
Narayanan, R.,
Vijwani, H.,
& Mukhopadhyay, S. M.
(2016). Electrochemical Charge Storage in Hierarchical Carbon Manifolds. .
https://corescholar.libraries.wright.edu/mme/404
Comments
Presented at the 229th ECS Meeting, May 29-June 2, 2016 in San Diego, CA.