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Title: High Performance Carbon Materials for Ultracapacitors

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Advanced Fuel Research, Inc.
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
901282
Report Number(s):
DOE/ER/83137-1
523173
DOE Contract Number:
FG02-01ER83137
Type / Phase:
SBIR
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 24 POWER TRANSMISSION AND DISTRIBUTION; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; Microporous carbon, Hybrid Electric Vehicles (HEVs), Next-Generation Vehicles (NGVs), ultracapacitors, ultracapacitor electrode, regenerative braking systems

Citation Formats

Eric P. Rubenstein, Marek A. Wójtowicz, Elizabeth Florczak, Erik Kroo, Michael A. Serio, and Joseph Cosgrove. High Performance Carbon Materials for Ultracapacitors. United States: N. p., 2007. Web.
Eric P. Rubenstein, Marek A. Wójtowicz, Elizabeth Florczak, Erik Kroo, Michael A. Serio, & Joseph Cosgrove. High Performance Carbon Materials for Ultracapacitors. United States.
Eric P. Rubenstein, Marek A. Wójtowicz, Elizabeth Florczak, Erik Kroo, Michael A. Serio, and Joseph Cosgrove. Mon . "High Performance Carbon Materials for Ultracapacitors". United States. doi:.
@article{osti_901282,
title = {High Performance Carbon Materials for Ultracapacitors},
author = {Eric P. Rubenstein and Marek A. Wójtowicz and Elizabeth Florczak and Erik Kroo and Michael A. Serio and Joseph Cosgrove},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 26 00:00:00 EDT 2007},
month = {Mon Mar 26 00:00:00 EDT 2007}
}

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  • Design criteria for carbon-based Ultracapacitors have been determined for specified energy and power requirements, using the geometry of the components and such material properties as density, porosity and conductivity as parameters, while also considering chemical compatibility. This analysis shows that the weights of active and inactive components of the capacitor structure must be carefully balanced for maximum energy and power density. When applied to nonaqueous electrolytes, the design rules for a 5 Wh/kg device call for porous carbon with a specific capacitance of about 30 F/cm{sup 3}. This performance is not achievable with pure, electrostatic double layer capacitance. Double layermore » capacitance is only 5 to 30% of that observed in aqueous electrolyte. Tests also showed that nonaqeous elcctrolytes have a diminished capability to access micropores in activated carbon, in one case yielding a capacitance of less than 1 F/cm{sup 3} for carbon that had 100 F/cm{sup 3} in aqueous electrolyte. With negative results on nonaqueous electrolytes dominating the present study, the obvious conclusion is to concentrate on aqueous systems. Only aqueous double layer capacitors offer adequate electrostatic charging characteristics which is the basis for high power performance. There arc many opportunities for further advancing aqueous double layer capacitors, one being the use of highly activated carbon films, as opposed to powders, fibers and foams. While the manufacture of carbon films is still costly, and while the energy and power density of the resulting devices may not meet the optimistic goals that have been proposed, this technology could produce true double layer capacitors with significantly improved performance and large commercial potential.« less