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. 21, 2007
Filed:
Jun. 06, 2003
Kaiyuan Yang, Roswell, GA (US);
Kevin P. Mcgrath, Alpharetta, GA (US);
Naveen Agarwal, Alpharetta, GA (US);
Jaeho Kim, Roswell, GA (US);
Kaiyuan Yang, Roswell, GA (US);
Kevin P. McGrath, Alpharetta, GA (US);
Naveen Agarwal, Alpharetta, GA (US);
Jaeho Kim, Roswell, GA (US);
Agere Systems, Inc., Allentown, PA (US);
Abstract
Positive electrode-active materials for use in lithium-ion and lithium-ion polymer batteries contain quaternary composite oxides of manganese, nickel, cobalt and aluminum where one of the four is present at levels of over 70 mol percent. The composite oxides can be lithiated to form positive electrode-active materials that are stable over at least ten charge/discharge cycles at voltage levels over 4.8 volts, and have capacities of over 200 mAh/g. Methods for producing the materials and electrochemical cells and batteries that include the materials are also provided.