High power density double layer energy storage devices

Details High power density double layer energy storage devices High power density double layer energy storage devices

1997-06-23

1999-07-20

Kincaid, Kristine

Electricity: electrical systems and devices

Electrolytic systems or devices

Double layer electrolytic capacitor

361504, 361508, 361526, 361528, 361512, H01G 900

Patent

active

059263610

ABSTRACT:
The present invention relates to lignocellulosic-based carbon-containing double layer energy storage devices having improved electrical power densities. In particular, the invention provides a double layer energy storage cell comprising a pair of electrodes, at least one of which is a carbon paste electrode, a porous ionically conductive separator, and an ion insulating connector, the improvement wherein said carbon paste electrode includes an activated linocellulosic-based carbon having a pore volume of greater than about 0.45 cc/g, a median pore width of 2.0 to 50.0 nm, a specific surface area of greater than about 500 m.sup.2 /g, and a mesopore content, based on the total particle volume of the activated carbon, of greater than about 75%.

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