Abstract: A superior lithium secondary battery having high total discharge capacity, high effective discharge capacity, high total discharge efficiency, and high effective discharge rate can be obtained by using, as a carbon electrode for a lithium secondary battery, a carbon for a lithium secondary battery obtained by successively conducting a halogenation treatment, a dehalogenation treatment, and a pore adjustment treatment on a dry-distilled charcoal, or by successively conducting a crushing treatment, a molding treatment, and a carbonization treatment on a dry-distilled charcoal.

Abstract: It is possible to obtain at high yield a carbonaceous material suitable for carbon electrodes of electrical double layer capacitors and having superior capacitance by means of a method comprising a halogenation treatment step wherein a halogenated dry-distilled charcoal is obtained by bringing a dry-distilled charcoal into contact with a halogen gas; and by a dehalogenation treatment step wherein a part or all of the above-mentioned halogen in said halogenated dry-distilled charcoal is eliminated. In addition, it is possible to obtain carbonaceous material for electrical double layer capacitors, which has a large capacitance at rapid discharge and excellent shape, by means of conducting a molding treatment step in which a molded article is made by crushing a dry-distilled charcoal and adding a binding agent; and a carbonization treatment step in which the above-mentioned molded article is heated in an inert gas atmosphere before conducting the halogenation treatment.

Abstract: It is the objective of the present invention to provide an active carbon electrode which is of sufficient mechanical strength to be formed into a large plate, may be suitably used as an electrical double layer condenser capable of a large current discharge, and which can realize a high capacitance. The method of production for such an active carbon electrode comprises the steps of a) producing a carbon base material by carrying out a first activation treatment to a carbon material obtained by carbonization of a carbon compound; b) producing a formed body by adding a binder to the carbon base material; c) carbonizing the formed body; and d) producing an active carbon electrode by carrying out a second activation treatment to the carbonized formed body.