Composite electrode including ptc polymer

Details Composite electrode including ptc polymer Composite electrode including ptc polymer

H - Electricity

01

M

H01M 4/02 (2006.01) H01C 7/02 (2006.01) H01M 10/42 (2006.01) H01M 2/16 (2006.01) H01M 4/66 (2006.01) H01M 6/10 (2006.01) H01M 6/50 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2345319

A composite electrode (18) for a rechargeable lithium battery is described. The composite electrode has a metallic current collector (12) in contact with an electrically conducting organic polymer laminate (14) made of a blended and annealed polymeric mixture containing fine carbon particles, and coated with an electrode-active substance bearing layer (16). The conducting polymer is capable of reversible resistivity changes of several orders of magnitude in only a portion of the laminate, thereby reducing locally excessive current flow and over-heating in the rechargeable lithium battery.

L'invention porte sur une électrode (18) composite destinée à une batterie au lithium rechargeable. Cette électrode composite comporte un collecteur (12) de courant métallique en contact avec un lamellé (14) polymère organique électroconducteur constitué d'un mélange polymère brassé et recuit contenant de fines particules de carbone et recouvert d'une couche (16) support d'une substance active de l'électrode. Le polymère conducteur est capable de transformations réversibles de la résistivité de plusieurs ordres de grandeur dans une partie uniquement du lamellé, ce qui réduit l'écoulement de courant excessif local et crée une surchauffe dans la batterie au lithium rechargeable.

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