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

  • US 7,745,056 B2
  • Filed: 12/01/2006
  • Issued: 06/29/2010
  • Est. Priority Date: 12/02/2005
  • Status: Active Grant
First Claim
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1. 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,wherein the chelating agent is at least one selected from the group consisting of NTA (nitrilotriacetic acid), DCTA (trans-1,2-diaminocyclohexanetetraacetic acid), DTPA (diethylene-triamine pentaacetic acid), and EGTA (ethylene glycol bis(2-aminoethyl ether)-N,N,N′

    ,N′

    -tetraacetic acid),wherein the chelating agent is contained in an amount of 2 to 200 mM relative to the electrolyte.

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