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:
Jul. 11, 2023
Filed:
Nov. 21, 2018
Lg Chem, Ltd., Seoul, KR;
Jung Min Han, Daejeon, KR;
Wang Mo Jung, Daejeon, KR;
Dong Hun Lee, Daejeon, KR;
Sung Bin Park, Daejeon, KR;
Ji Hye Kim, Daejeon, KR;
Dong Hwi Kim, Daejeon, KR;
Hyung Man Cho, Daejeon, KR;
Abstract
A positive electrode material for a secondary battery, including a first positive electrode active material and a second positive electrode active material, wherein the first positive electrode active material and the second positive electrode active material consist of a lithium composite transition metal oxide including at least two or more transition metals selected from the group consisting of nickel (Ni), cobalt (Co) and manganese (Mn) are provided. The average particle size (D) of the first positive electrode active material is two or more times larger than that of the second positive electrode active material, and the first positive electrode active material has a concentration gradient in which at least one of Ni, Co or Mn contained in the lithium composite transition metal oxide has a concentration difference of 1.5 mol % or more between the center and the surface of a particle of the lithium composite transition metal oxide.