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:
Oct. 03, 2023
Filed:
Dec. 23, 2019
Korea Institute of Science and Technology, Seoul, KR;
Kyung Yoon Chung, Seoul, KR;
Dong Hyun Kim, Seoul, KR;
Juhyeon Ahn, Seoul, KR;
Jaeho Park, Seoul, KR;
Ji-Young Kim, Seoul, KR;
Min Kyung Cho, Seoul, KR;
Byung Won Cho, Seoul, KR;
Hun-Gi Jung, Seoul, KR;
Minah Lee, Seoul, KR;
Seungho Yu, Seoul, KR;
Hyungseok Kim, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
Disclosed is a method of preparing a cathode active material useful in a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics. The method for preparing a cathode active material composed of Zr-doped NaLiMOincludes the steps of (A) doping LiMOwith Zrto provide Zr-doped LiMO; and (B) dissociating Li ion from the Zr-doped LiMOand inserting Na ion thereto to provide the Zr-doped NaLiMO, wherein M is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo, Ru, and combinations thereof, and wherein 0.005<w<0.05, 0.8≤x≤0.85, 0.09≤y≤0.11, 7≤x/y≤10, 0.7≤z≤0.95, and 1.95≤a≤2.05. When the cathode active material is used for manufacturing a cathode for a sodium ion secondary battery, the battery can substitute for a conventional, expensive lithium ion secondary battery.