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:
Jun. 16, 2026
Filed:
Apr. 07, 2021
Ecopro Bm Co., Ltd., Cheongju-si, KR;
Moon Ho Choi, Cheongju-si, KR;
Gwang Seok Choe, Cheongju-si, KR;
Jun Won Suh, Cheongju-si, KR;
Jin Kyeong Yun, Cheongju-si, KR;
Jung Han Lee, Cheongju-si, KR;
Seung Woo Choi, Cheongju-si, KR;
Joong Ho Bae, Cheongju-si, KR;
Du Yeol Kim, Cheongju-si, KR;
ECOPRO, Cheongju-si, KR;
Abstract
The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a bimodal-type positive electrode active material that includes a first lithium composite oxide which is a small particle and a second lithium composite oxide which is a large particle, which have different average particle diameters, thereby improving an increasing deviation of an average particle diameter and degraded impedance and lifetime characteristics due to excessive calcination for any one of the small and large particles during simultaneous calcination, a positive electrode including the same, and a lithium secondary battery using the same.