| abstract |
A lithium ion electrochemical cell having highncharge/discharge capacity, long cycle life andnexhibiting a reduced first cycle irreversible capacity,nis described. The stated benefits are realized by thenaddition of at least one sulfate additive to annelectrolyte comprising an alkali metal salt dissolved inna solvent mixture that includes ethylene carbonate,ndimethyl carbonate, ethylmethyl carbonate and diethylncarbonate. The preferred additive is selected from ansilyl sulfate, tin sulfate or an organic sulfate. |