The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2011
Filed:
Jan. 17, 2007
Ho Chun Lee, Daejeon, KR;
Sun Sik Shin, Daejeon, KR;
Hong Kyu Park, Daejeon, KR;
Joo MI Jeon, Seoul, KR;
Jeong Ju Cho, Daejeon, KR;
Ho Chun Lee, Daejeon, KR;
Sun Sik Shin, Daejeon, KR;
Hong Kyu Park, Daejeon, KR;
Joo Mi Jeon, Seoul, KR;
Jeong Ju Cho, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is an electrolyte for batteries, comprising: (a) an electrolyte salt; (b) an organic solvent; (c) a first compound having an oxidation initiation voltage (vs. Li/Li) higher than the operating voltage of a cathode; and (d) a second reversible compound having an oxidation initiation voltage higher than the operating voltage of the cathode, but lower than the oxidation initiation voltage of the first compound. Also disclosed is a lithium secondary battery comprising said electrolyte. In the lithium secondary battery, two compounds having different safety improvement actions at a voltage higher than the operating voltage of the cathode are used in combination as electrolyte components. Thus, the safety of the secondary battery in an overcharged state can be ensured, and at the same time, the deterioration of the battery can be prevented from occurring when it is repeatedly cycled, continuously charged and stored at high temperature for a long time.