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A secondary battery or cell with improved rechargeability is obtained by combination of (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising an organic solvent having dissolved therein a lithium salt and (C) an anode active material compr

A secondary battery or cell with improved rechargeability is obtained by combination of (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising an organic solvent having dissolved therein a lithium salt and (C) an anode active material comprising lithium metal in electrical contact with an electrically conductive carbonaceous material which is a pyrolysis residue of an organic material such as synthetic high polymers. The anode active material can be formed in situ within the battery, by self discharge of lithium metal into the carbonaceous material. The battery or cell is of excellent properties, such as stability or flatness of discharge voltage and electric capacity.

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A secondary battery or cell with improved rechargeability, which comprises: (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising a organic solvent having dissolved therein a lithium salt, and (C) an anode active material comprising lithiu

A secondary battery or cell with improved rechargeability, which comprises: (A) a cathode active material comprising a chalcogen compound of a transition metal, (B) an electrolyte comprising a organic solvent having dissolved therein a lithium salt, and (C) an anode active material comprising lithium metal in electrical contact with an electrically conductive substantially amorphous carbonaceous material having a conductivity of at least 10-5 mho/cm and a density of at most 1.8 g/cm3, said carbonaceous material being a pyrolysis residue formed by heating at least one organic material selected from the group consisting of synthetic high polymers, natural high polymers, pitches and coals, in an inert atmosphere to a temperature ranging from about 300°C. to 1500°C., wherein said anode material is formed in situ within the secondary battery or cell, by self discharge of lithium metal into said carbonaceous material.