Sulfite additives for nonaqueous electrolyte rechargeable cells

Details Sulfite additives for nonaqueous electrolyte rechargeable cells Sulfite additives for nonaqueous electrolyte rechargeable cells

H - Electricity

01

M

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

Patent

CA 2299102

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 sulfite 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 an alkyl sulfite compound.

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