COMPOSITE CARBONACEOUS MATERIAL FOR CHEMICAL CURRENT SOURCE AND METHOD OF PRODUCING SAME

A composite carbonaceous material (primarily for a lithium current source) consists of a mixture of, homogeneously-distributed throughout the material: a conductive component in the form of thermally-expanded graphite and a dispersed filler/additive. The conductive material, thermally-expanded graphite, is directly and functionally used as a binder in said press-rolled material, and highly-dispersed carbon and/or mineral powders are used as the dispersed filler/additive. Most preferably, the contents of the above-mentioned dispersed filler/additive in the mixture would range, in mass percent, between 2.5 and 37.5. A method for producing the above-mentioned electrically-conductive composite carbonaceous material includes the following technological operations. Using one of the methods known in the art for forming a homogenized mixture of the conductive component (in the form of thermally-expanded graphite) and of the dispersed filler/additive. Then, forming said (homogenized) mixture using the binder. The claimed method differs from solutions known in the art in that: highly-dispersed carbon and/or mineral powders are used as the dispersed filler/additive; forming is achieved by pressing the mixture and then rolling same; thermally-expanded graphite is directly and functionally used as the binder during the forming process (that is, in this specific case, during pressing and rolling). L'invention concerne un matériau composite comprenant du carbone (notamment pour une source de courant au lithium) qui consiste en un mélange les éléments suivants répartis de manière homogène dans le matériau : un composant conducteur sous forme de graphite thermo-expansé, et un additif-matière de charge dispersif. Dans le matériau pressé-laminé. On utilise en qualité de liant un composant à conduction immédiate consistant en du graphite thermo-expansé, tandis que l'additif-matière de charge dispersif consiste en des poudres à haute dispersion organiques et/ou minérales. De manière optimale, le contenu dudit additif-matière de charge dispersif dans ledit mélange varie de 2,5 à 37,5 % en poids. Le procédé de production de ce matériau composite contenant du carbone et conducteur d'électricité comprend les opérations industrielles suivantes. Selon un procédé connu du domaine technique, on forme un mélange homogénéisé de composant conducteur (sous forme de graphite thermo-expansé) et d'additif-matière de charge dispersif. On effectue ensuite une mise en forme de ce mélange homog