Improved lithium cell and method of forming same

Details Improved lithium cell and method of forming same Improved lithium cell and method of forming same

H - Electricity

01

M

H01M 10/058 (2010.01) H01M 10/05 (2010.01) H01M 6/00 (2006.01) H01M 6/14 (2006.01) H01M 4/133 (2010.01) H01M 2/20 (2006.01)

Patent

CA 2578542

High capacity primary and rechargeable cells (10) may include a cathode (18) with a lithiated active cathode material and an anode (12) including lithium intercalating carbonaceous material. The cells (10) may also include a separator (16) impregnated with a liquid electrolyte (14) or a solid electrolyte. The ratio of the capacity to reversibly incorporate lithium ions of the cathode (18) to the capacity to reversibly incorporate lithium ions in the form of LiC6 of the carbonaceous material of the anode (12) is equal to or larger than 2:1. During charging a high grade high density substantially non- dendritic lithium metal layer is plated on the anode (12).

La présente invention concerne des piles rechargeables primaires à grande capacité qui peuvent comprendre une cathode présentant une matière de cathode active lithiée et une anode présentant une matière carbonée d'intercalation de lithium. Ces piles peuvent également comprendre un séparateur qui est imprégné d'un électrolyte liquide ou d'un électrolyte solide. Le rapport de la capacité à incorporer de manière réversible des ions lithium de la cathode sur la capacité à incorporer de manière réversible des ions lithium sous forme de LiC6 de la matière carbonée de l'anode est supérieur ou égal à 2:1. Lors de la charge, une couche de métal lithium sensiblement non dendritique, à haute densité et à haute teneur, est déposée sur l'anode.

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