Process for producing a carbon material for an electric double layer capacitor electrode, and processes for producing an electric double layer capacitor electrode and an electric double layer capacitor employing it

A process for producing a carbon material for an electric double layer capacitor electrode, which comprises: 1) a step of activating a graphitizable carbon or a graphitizable carbon source to bring its pore volume to be from 0.6 to 1.5 cm/g; and 2) a step of imparting mechanical impact force to the graphitizable carbon or the graphitizable carbon source activated in the above step 1) to reduce the pore volume to at most 75% of that before the mechanical impact force is imparted.