Le Carbone Lorraine

Le Carbone Lorraine, S.a.

Rachid Yazami

Michel Moreau

Jacques Maire

Philippe Touzain

Marc Deschamps

A composite carbon/polymer electrode for a rechargeable electrochemical lithium cell comprises a powder of carbonaceous material and a coating polymer rendered ionically conductive by the addition of a lithium salt, and possibly carbon black or carbon fibers. The carbonaceous material has a proportion of volatile matter between 5 and 22 wt %, and is preferably a raw coke or a semi-coke.

Composite carbon/polymer electrode for a rechargeable electrochemical

The subject of the present invention is an electrode based on carbonaceous material for rechargeable electrochemical lithium generators. The carbonaceous material is a pitch coke with a mosaic texture subjected to a pre-lithiation treatment before the production of the electrode. The carbonaceous material is preferably a coal tar pitch coke with a mosaic texture. The specific reversible capacities are greater than 400 mAh/g.

Negative electrode based on pre-lithiated carbonaceous material for a

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 m.sup.2 /g, and a granulometry at most equal to 4 .mu.m. The graphite oxide or the graphite-NiCl.sub.2 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.

Growing community of inventors

Saint Nazaire les Eymes, France

Rachid Yazami