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:
May. 21, 2019
Filed:
Apr. 08, 2014
Lg Chem, Ltd., Seoul, KR;
Sung Hoon Yu, Daejeon, KR;
Yoo Sun Kang, Daejeon, KR;
Kyung Mi Lee, Daejeon, KR;
Jin Hyun Park, Daejeon, KR;
Jung Don Suk, Daejeon, KR;
Doo Kyung Yang, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Provided are a lithium secondary battery including a cathode, an anode, a separator, and a gel polymer electrolyte, wherein i) the anode includes a silicon (Si)-based anode active material, ii) the gel polymer electrolyte is formed by polymerizing a composition that includes a monomer having a functional group bondable to metal ions, and iii) a charge voltage of the battery is in a range of 3.0 V to 5.0 V. Since the lithium secondary battery of the present invention may prevent the movement of metal ions dissolved from a cathode to an anode or reduce the precipitation of metal on the anode, the lifetime of the battery may not only be improved but capacity characteristics of the battery may also be excellent even in the case in which the battery is charged at a high voltage as well as normal voltage.