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. 02, 2019
Filed:
Nov. 04, 2016
Samsung Sdi Co., Ltd., Yongin-si, Gyeonggi-do, KR;
JinHwa Kim, Yongin-si, KR;
JoongHo Moon, Yongin-si, KR;
JeonJin Choi, Yongin-si, KR;
YuMi Song, Yongin-si, KR;
MinHan Kim, Yongin-si, KR;
DoHyung Park, Yongin-si, KR;
SeonYoung Kwon, Yongin-si, KR;
SAMSUNG SDI CO., LTD., Yongin-si, Gyeonggi-do, KR;
Abstract
A positive electrode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery, the positive electrode active material including nickel, cobalt, and manganese, wherein the positive electrode active material has a core part and a surface part, an amount of manganese in the core part and the surface part is higher than 25 mol %, and amounts of nickel and cobalt in the positive electrode active material vary such that a concentration gradient of the nickel and the cobalt in a direction from the core part to the surface part is present in the positive electrode active material.