High discharge capacity lithium battery

H - Electricity – 01 – M

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H01M 4/36 (2006.01)

Patent

CA 2588612

A lithium/iron disulfide electrochemical battery cell with a high discharge capacity. The cell has a lithium negative electrode, an iron disulfide positive electrode and a nonaqueous electrolyte. The iron disulfide of the positive electrode has a controlled average particle size range which allows the electrochemical cells to exhibit desired properties in both low and high rate applications. In various embodiments, the iron disulfide particles are wet milled, preferably utilizing a media mill or milled utilizing a non- mechanical mill such as a jet mill, which reduces the iron disulfide particles to a desired average particle size range for incorporation into the positive electrode.

La présente invention concerne un accumulateur électrique électrochimique de type lithium/disulfure de fer à haute capacité de décharge. L'anode est au lithium, la cathode au disulfure de fer, et l'électrolyte est non aqueux. Le calibre particulaire moyen contrôlé de la cathode au disulfure de fer présente permet à l'accumulateur d'offrir les qualités attendues que le débit soit faible ou élevé. Dans certains modes de réalisation, les particules de disulfure de fer sont broyées humides, de préférence au broyeur à charge broyante, ou au broyeur non mécanique (broyeur à jet, etc.) ce qui donne des calibres particulaires moyens de particules de disulfure de fer s'inscrivant dans la plage souhaitée pour l'incorporation en cathode.

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