Patent ID: 6043183
Filing Date: 2000-03-28
Classification: H01G,Y02E

Abstract:
An improved process for producing carbons for use in high power carbon double layer capacitors comprising the steps of:(a) blending together fragments of a lignocellulosic material with an activating agent;(b) activating the lignocellulosic material; and(c) wherein the improvement comprises heating, under a gas atmosphere selected from the group consisting of inert gases, flue gases and combinations thereof, the activated lignocellulosic material to a temperature from about 900.degree. C. to about 1120.degree. C. in a densification step to produce an activated carbon with 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, a mesopore content, based on the total pore volume, of greater than about 75%, and a total combined micropore and macropore content, based on the total pore volume, of less than about 25%.