Carbon material for electric double layer capacitor electrodes

Details Carbon material for electric double layer capacitor electrodes Carbon material for electric double layer capacitor electrodes

2007-08-14

2007-08-14

Hendrickson, Stuart L (Department: 1754)

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

C502S427000

Reexamination Certificate

active

10703635

ABSTRACT:
A carbon material for electric double layer capacitor electrodes which is obtained by a heat treatment and an activation treatment of a material pitch having a softening point in a range of 150 to 350° C., a ratio of amounts by atom of hydrogen to carbon (H/C) in a range of 0.50 to 0.90 and a content of optically anisotropic components of 50% or greater. The material pitch is preferably a synthetic pitch obtained by polymerizing a condensed polycyclic hydrocarbon such as naphthalene, methylnaphthalene, anthracene, phenanthrene, acenaphthene, acenaphthylene and pyrene in the presence of an ultra-strong acid catalyst such as a hydrogen fluoride-boron trifluoride complex. Electric double layer capacitors having a high electrode density and a high electrostatic capacity per unit volume can be constructed using the carbon material.

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