Improved additives for overcharge protection in non-aqueous...

Details Improved additives for overcharge protection in non-aqueous... Improved additives for overcharge protection in non-aqueous...

H - Electricity

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M

H01M 10/24 (2006.01) H01M 6/16 (2006.01) H01M 6/50 (2006.01) H01M 10/42 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2216898

Non-aqueous rechargeable lithium batteries can be protected against overcharge abuse by incorporating small amounts of suitable additives into the electrolyte. Additives selected from the group consisting of phenyl-R-phenyl compounds wherein R is an aliphatic hydrocarbon, fluorine substituted biphenyl compounds, and 3-thiopheneacetonitrile can provide superior cycling performance along with satisfactory overcharge protection in high voltage lithium ion batteries. 2,2- diphenylpropane can be a preferred gassing agent additive in batteries equipped with electrical disconnect devices.

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