Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Reexamination Certificate
2009-07-28
2011-10-25
Weiner, Laura (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
C429S310000, C429S317000, C429S338000, C429S337000, C429S341000, C429S342000, C429S343000, C429S330000, C429S199000, C429S200000, C429S332000, C252S062200
Reexamination Certificate
active
08043749
ABSTRACT:
An electrolyte for a lithium ion secondary battery and a lithium ion secondary battery comprising the electrolyte. The electrolyte comprises a non-aqueous organic solvent, a lithium salt, and at least one aromatic phosphate compound. Exothermic reactions are inhibited in the battery upon overcharge or during high-temperature storage to prevent an increase in the temperature of the battery, resulting in an improvement in safety. In addition, the battery exhibits good swelling stability during high-temperature storage as well as improved cycle life characteristics. The electrolyte further comprises an ethylene carbonate-based compound. The presence of the ethylene carbonate-based compound leads to further improvements in the overcharge safety, high-temperature safety and cycle life characteristics of the battery.
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Patent Abstracts of Japan, and English machine translation of Japanese Publication 09-082293, listed above, 13 pages.
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Christie Parker & Hale LLP
Samsung SDI & Co., Ltd.
Weiner Laura
LandOfFree
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