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Additives for non-aqueous electrolyte and secondary battery using the same

  • US 9,368,835 B2
  • Filed: 05/16/2014
  • Issued: 06/14/2016
  • Est. Priority Date: 05/15/2007
  • Status: Active Grant
First Claim
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1. A lithium secondary battery comprising:

  • a cathode, an anode, an electrolyte and a pressure sensing device or a temperature sensing device,wherein the electrolyte comprises (a) an electrolyte salt;

    (b) an electrolyte solvent comprising a combination of fluoroethylene carbonate, propylene carbonate and dimethyl carbonate; and

    (c) a compound generating heat through oxidation at voltages higher than drive voltage of a cathode,wherein the compound (c) is 1,4-dimethoxytetrafluorobenzene,wherein the compound decomposes or evaporates electrolyte components by oxidation heat, thereby causing generation of gas, andwherein a content of the compound (c) is within a range of 0.05 to 5 parts by weight, based on 100 parts by weight of the electrolyte.

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