Non-aqueous-electrolyte and lithium secondary battery using the same

The present invention relates to a nonaqueous electrolyte solution containing new additives and a lithium secondary battery including the same. More particularly, the invention relates to a nonaqueous electrolyte solution containing a lithium salt, an electrolyte compound, a first additive compound...

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Bibliographic Details
Main Authors AHN, SOON-HO, HYEONG JIN KIM, HAN HO LEE, SON, MI-YOUNG, LEE, HOUN, LEE, JAE-HYUN, CHO, JEONG-JU
Format Patent
LanguageChinese
English
Published 16.08.2005
Subjects
BASIC ELECTRIC ELEMENTS
CABLES
CONDUCTORS
ELECTRICITY
INSULATORS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
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Summary:The present invention relates to a nonaqueous electrolyte solution containing new additives and a lithium secondary battery including the same. More particularly, the invention relates to a nonaqueous electrolyte solution containing a lithium salt, an electrolyte compound, a first additive compound with an oxidation initiation potential of more than 4.2V, and a second additive compound with an oxidation initiation potential of more than 4.2V, which is higher in oxidation initiation potential than the first additive and deposits oxidative products or form a polymer film in oxidation, as well as a lithium secondary battery including the same. The present invention can provide a lithium secondary battery excellent in both the battery performance and the battery safety in overcharge by the combined use of the first additive and the second battery as additives to the nonaqueous electrolyte solution.
Bibliography:Application Number: TW20040106934