Lithium secondary battery and electrolyte thereof

  • US 6,033,809 A
  • Filed: 08/21/1998
  • Issued: 03/07/2000
  • Est. Priority Date: 08/22/1997
  • Status: Expired due to Term
First Claim
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1. A non-aqueous electrolyte lithium secondary battery comprising a cathode, an anode and a non-aqueous electrolyte comprising an electrolyte dissolved in a non-aqueous solvent, wherein the cathode is composed of a material containing a lithium complex oxide, the anode is composed of a material containing graphite and the non-aqueous solvent contains, as main components, a cyclic carbonate and a linear carbonate and 0.1 to 4% by weight, based upon the total weight of the non-aqueous solvent, of a sultone derivative having the general formula (I):

  • ##STR3## wherein R1, R2, R3, R4, R5 and R6 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an-aryl group having 6 to 12 carbon atoms or a hydrogen atom and n is an integer of 0 to 2.

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