Non-aqueous electrolyte secondary battery and method for producing anode therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShuji Ito, Toshihide Murata, Masaki Hasegawa, Yasuhiko Bito, Yoshinori Toyoguchi
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Abstract
A non-aqueous electrolyte secondary battery is disclosed which has an anode comprising a carbon material. The carbon material contains at least one of 7-35 wt % sulfur, 6.5-25 wt % oxygen and 10.5-18.3 wt % nitrogen, provided that if the carbon material contains at least two of these elements, the total amount of the elements does not exceed 35 wt %.
Claims29
A non-aqueous electrolyte secondary battery comprising a cathode capable of being charged and discharged, a non-aqueous electrolyte, and an anode capable of being charged and discharged, wherein said anode comprises a carbon material containing at least one of 7-35 wt % sulfur and 10.5-18.3 wt % nitrogen, provided that if said carbon material contains two of these elements, the total amount of the elements does not exceed 35 wt %.
A non-aqueous electrolyte secondary battery comprising a cathode capable of being charged and discharged, a non-aqueous electrolyte, and an anode capable of being charged and discharged, wherein said anode comprises the carbon residue of a thermal decomposition reaction of an organic compound containing at least one of sulfur and nitrogen, said carbon residue containing at least one of 7-35 wt % sulfur and 10.5-18.3 wt % nitrogen, provided that if said carbon residue contains two of these elements, the total amount of the elements does not exceed 35 wt %.
A non-aqueous electrolyte secondary battery comprising a cathode capable of being charged and discharged, a non-aqueous electrolyte, and an anode capable of being charged and discharged, wherein said anode comprises a carbon material that contains 6.5-25 wt % oxygen and that is essentially free of phosphorus.
A non-aqueous electrolyte secondary battery comprising a cathode capable of being charged and discharged, a non-aqueous electrolyte, and an anode capable of being charged and discharged, wherein said anode comprises the carbon residue of a thermal decomposition reaction of an organic compound that contains oxygen and that is essentially free of phosphorus, said carbon residue containing 6.5-25 wt % oxygen.
A method for producing an anode material for a non-aqueous electrolyte secondary battery comprising the step of heating an organic compound containing at least one member selected from the group consisting of sulfur, oxygen and nitrogen, together with at least one member selected from the group consisting of a metal halide and halogen in an inert atmosphere at 500.degree.-1,400.degree. C., thereby to obtain a carbon material containing at least one member selected from the group consisting of sulfur, oxygen and nitrogen.
Dependencies are inferred from the claim text.