Carbon foams for energy storage devices
AssigneeThe Regents of the University of California
InventorsJames L. Kaschmitter, Steven T. Mayer, Richard W. Pekala
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Abstract
A high energy density capacitor incorporating a variety of carbon foam electrodes is described. The foams, derived from the pyrolysis of resorcinol-formaldehyde and related polymers, are high density (0.1 g/cc-1.0 g/cc) electrically conductive and have high surface areas (400 m.sup.2 /g-1000 m.sup.2 /g). Capacitances on the order of several tens of farad per gram of electrode are achieved.
Claims7
A foam selected from the group consisting of aerogel carbon foam, xerogel carbon foam, and xerogel-aerogel hybrid carbon foam, and derived from the pyrolysis of mixtures consisting of resorcinol-furfural, resorcinol-formaldehyde, phenol-resorcinol-formaldehyde, catechol-formaldehyde, and phloroglucinol-formaldehyde;
- said foam having a density of greater than 0.3 g/cc to about 1.2 g/cc and a surface area of between about 100 m.sup.2 /g to about 1200 m.sup.2 /g.
Dependencies are inferred from the claim text.