GRAPHITE INTERCALATION COMPOUNDS WITH IMPROVED PERFORMANCE, AND ELECTROCHEMICAL APPLICATION OF THESE COMPOUNDS

摘要

The present invention relates to insertion compounds with improved performances for electrochemical applications. They are characterized in that they are obtained from a graphite with a specific surface area of at least 100 m2/g, and a granulometry at most equal to 4 mu m. The graphite oxide or the graphite-NiCl2 first stage obtained from such a graphite is used as constituting agent of the cathode of a lithium battery and it gives to same excellent characteristics. The graphite oxide performances may further be improved by preparing it by double oxidation of a graphite having any specific surface area and the granulometry is of the order of the mu m, as shown by FIG. 2 which represents the intensiostatic discharge curves of the lithium batteries the cathode of which contains the graphite oxide.