Carbonaceous material and a non aqueous electrolyte cell using the same
AssigneeSony Corporation
InventorsHideto Azuma, Atsuo Omaru, Yoshio Nishi
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Abstract
A carbonaceous material and a non-aqueous electrolyte cell using the carbonaceous material as an anode are disclosed. The carbonaceous material has an interlayer spacing, d.sub.002, of not less than 3.70 angstroms and a true density of less than 1.70 g/cm.sup.3, and contains from 0.2 to 5.0 weight % of phosphorus. The carbonaceous material has a large doping capacity for Li, and the non-aqueous electrolyte cell using the material has a large capacity and improved charge-discharge cycle characteristics.
Claims8
A carbonaceous material having an interlayer spacing, d.sub.002, of not less than 3.70 angstroms and a true density of less than 1.70 g/cm.sup.3, having no exothermic peak at not less than 700.degree. C. as measured by a differential thermal analysis in air stream, and containing from 0.2 to 5.0 weight % of phosphorus.
A non-aqueous electrolyte cell comprising:
- an anode including a carbonaceous material amenable to doping and de-doping with Li;
- a cathode of a compound including Li for doping said carbonaceous material when a charge is applied to said non-acqueous electrolyte cell;
- and
- a non-aqueous electrolyte;
- wherein said carbonaceous material has an interlayer spacing, d.sub.002, of not less than 3.70 angstroms and a true density of less than 1.70 g/cm.sup.3, having no exothermic peak at not less than 700.degree. C. as measured by a differential thermal analysis in air stream, and contains from 0.2 to 5.0 weight % of phosphorus.
Dependencies are inferred from the claim text.