NOVELTY - A carbonaceous material having layered structure is coated on the surface of an electrode plate, to prepare a positive electrode. A carbonaceous material having mass of 4 times or more with respect to mass of carbonaceous material of the positive electrode is coated on the electrode plate, to prepare a negative electrode. The positive electrode and negative electrode are placed in electrolyte containing anion, to produce a laminated cell. A compression pressure of 100-400 N/cm2 is applied with respect to the laminated cell, to obtain the carbonaceous material.    USE - Manufacture of carbonaceous material e.g. activated carbon used for manufacture of negative electrode and graphite or difficultly-graphitizing carbon used for manufacture of positive electrode used for electrical storage devices (all claimed) e.g. electrical double-layered capacitor and lithium-ion secondary battery used for power supply of portable apparatuses e.g. personal computer, mobile telephone, and solar cell, and vehicles e.g. electric vehicle and hybrid vehicle.    ADVANTAGE - The method enables the stable and efficient manufacture of carbonaceous material with high capacitance, by simple process.    DETAILED DESCRIPTION - A carbonaceous material having layered structure is coated on the surface of an electrode plate, to prepare a positive electrode. A carbonaceous material having mass of 4 times or more with respect to mass of carbonaceous material of the positive electrode is coated on the surface of an electrode plate, to prepare a negative electrode. The prepared positive electrode and negative electrode are placed opposably in a non-aqueous electrolyte containing anion capable of intercalating into the interlayer of carbonaceous material of the positive electrode, to produce a laminated cell. A compression pressure of 100-400 N/cm2 is applied with respect to surface direction of the laminated cell. A voltage application process is performed for one or more charging or discharging cycles by applying a charge voltage of 3.5-2.25 V during charging, to obtain the carbonaceous material. An INDEPENDENT CLAIM is included for electrical storage device (10), which contains the carbonaceous material as the positive electrode active material.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the structure of primitive cell of the electrical storage device.    Positive electrode (1)    Separator (3)    Negative electrode (4)    Lithium metal (6)    Electrical storage device (10)