Electrolyte for lithium secondary battery comprising chelating agent and lithium secondary battery using the same

Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithiu...

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Bibliographic Details
Main Authors Lee, Jae Hyun, Ahn, Soon Ho, Ok, Jong Hoa, Hong, Seung Tae, Kim, Jeong Min, Jung, Jong Mo, Kil, Hyo Shik, Lee, Sung Hyup
Format Patent
LanguageEnglish
Published 29.06.2010
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Summary:Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode.