Electric double-layer capacitor

Details Electric double-layer capacitor Electric double-layer capacitor

2007-02-20

2007-02-20

Thomas, Eric W. (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Double layer electrolytic capacitor

C361S503000, C252S062200

Reexamination Certificate

active

10547495

ABSTRACT:
Present invention relates to an electric double-layer capacitor having positive and negative electrodes containing nonporous carbon as an electrode active material. In the nonporous carbon, multiple layers of graphene having an average interplanar spacing d002of 0.350 to 0.380 nm have been grown well. The positive and negative electrodes are impregnated with an electrolyte solution. The nonporous carbon is obtained by activating easily graphitizable carbon, which in turn is obtained by calcining needle coke or pitch made infusible. The elctrolyte solution is either a liquid electrolyte having a planar molecular structure or an electrolyte solution consisting of a liquid electrolyte dissolved in an organic solvent.

REFERENCES:
patent: 2002/0039275 (2002-04-01), Takeuchi et al.
patent: 984471 (2000-03-01), None

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