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:
Aug. 01, 2017
Filed:
Apr. 08, 2015
Samsung Sdi Co., Ltd., Yongin-si, Gyeonggi-do, KR;
Ji-Hyun Kim, Yongin-si, KR;
Chang-Wook Kim, Yongin-si, KR;
Sang-Woo Cho, Yongin-si, KR;
Yong-Chan You, Yongin-si, KR;
Samsung SDI Co., Ltd., Yongin-si, KR;
Abstract
A positive active material for a rechargeable lithium battery includes a core including an overlithiated oxide represented by Chemical Formula 1, a first coating layer on the core and including a compound having a spinel structure, and a second coating layer on the first coating layer and including a compound represented by Chemical Formula 2. The compound having a spinel structure shows a peak between about 2.6 V and about 2.7 V in a graph of differential capacity dQ/dV vs. voltage, where the voltage is between about 4.7 V and about 2.5 V. In Chemical Formula 1, 0<x<1, 0<a<1, 0<b<1, 0<c<1, and a+b+c=1. In Chemical Formula 2, 0≦d<1 and 0<e≦1.xLiMnO.(1−x)LiNiCoMnO,  Chemical Formula 1LiTiO.  Chemical Formula 2