| 摘要 |
<P>PROBLEM TO BE SOLVED: To produce a carbon material for a polarizable electrode of an electric double layer capacitor exhibiting high electrostatic capacity by using raw coke, as the raw material, produced by a delayed coker. <P>SOLUTION: Raw coke produced from a petroleum-derived or coal-derived heavy oil by using a delayed coker is spherically ground and then subjected to an alkali activation treatment or an oxidative-gas activation treatment or is subjected to an alkali activation treatment or an oxidative-gas activation treatment and then spherically ground, thus giving a fine spherical carbon powder. This carbon powder is formed into a porous carbon material, and the carbon material gives a polarizable electrode which, when used for an electric double layer capacitor, exhibits electrostatic capacity of 20 F/mL or higher. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
