Sulfate additives for nonaqueous electrolyte rechargeable cells

Details Sulfate additives for nonaqueous electrolyte rechargeable cells Sulfate additives for nonaqueous electrolyte rechargeable cells

H - Electricity

01

M

H01M 10/26 (2006.01) H01M 10/40 (2006.01) H01M 6/16 (2006.01)

Patent

CA 2316438

A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one sulfate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is selected from a silyl sulfate, tin sulfate or an organic sulfate.

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