US 6,033,809 A
Lithium secondary battery and electrolyte thereofGeneral
US 6,033,809 A
Lithium secondary battery and electrolyte thereof
Tech Center:
1700 Chemical and Materials Engineering
Examiner:
Stephen Kalafut
Art Unit:
1745 Tires, Adhesive Bonding, Glass/Paper making, Plastics Shaping & Molding
Agent:
Inventors:
TOSHIKAZU HAMAMOTO; ATSUO HITAKA; YUKIO NAKADA; KOJI ABE
Assignee:
Priority:
08/22/97
Filed:
08/21/98
Granted:
03/07/00
Expiration:
08/21/18
Abstract
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): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 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.