Electrochemical cell having an electrode with a carbonate...

Details Electrochemical cell having an electrode with a carbonate... Electrochemical cell having an electrode with a carbonate...

H - Electricity

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H01M 4/00 (2006.01) H01M 4/02 (2006.01) H01M 4/62 (2006.01) H01M 6/16 (2006.01) H01M 10/40 (2006.01) H01M 4/04 (2006.01) H01M 4/58 (2006.01) H01M 4/66 (2006.01) H01M 6/30 (2006.01)

Patent

CA 2359634

An electrochemical cell of either a primary or a secondary chemistry, is described. In either case, the cell has a negative electrode of lithium or of an anode material which is capable of intercalating and de- intercalating lithium coupled with a positive electrode of a cathode active material. A carbonate compound is mixed with either the anode material or the cathode active material prior to contact with its current collector. The resulting electrode couple is activated by a nonaqueous electrolyte. The electrolyte flows into and throughout the electrodes causing the carbonate additive to dissolve in the electrolyte. The carbonate solute is then able to contact the lithium to provide an electrically insulating and sonically conducting passivation layer thereon.

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