Additives for overcharge protection in non-aqueous rechargeable

Details Additives for overcharge protection in non-aqueous rechargeable Additives for overcharge protection in non-aqueous rechargeable

1998-02-25

2000-06-13

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

429 62, 429200, 429324, 429331, 429332, 429338, H01M 1040, H01M 234

Patent

active

060747773

ABSTRACT:
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.

REFERENCES:
patent: 4075400 (1978-02-01), Fritts
patent: 4104451 (1978-08-01), Klemann et al.
patent: 5709968 (1998-01-01), Shimizu
J.R. Dahn et al.; "Thermal Stability of LixCoO2, LixNiO2, and .lambda.-MnO2 and consequences for the safety of Li-ion cells"; Solid State Ionics 69 (1994); pp. 265-270 (Month Unknown).

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