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:
Sep. 24, 2013
Filed:
Jan. 21, 2009
Larry Beck, Ann Arbor, MI (US);
Anthony E. Pullen, Belmont, MA (US);
Chuanjing Xu, Ann Arbor, MI (US);
Liya Wang, Ann Arbor, MI (US);
Phillip Sholtes, Grosse Ile, MI (US);
Larry Beck, Ann Arbor, MI (US);
Anthony E. Pullen, Belmont, MA (US);
Chuanjing Xu, Ann Arbor, MI (US);
Liya Wang, Ann Arbor, MI (US);
Phillip Sholtes, Grosse Ile, MI (US);
A123 Systems LLC, Livonia, MI (US);
Abstract
A positive electrode material is provided including an electroactive material having one or more phases comprising lithium (Li), an electroactive metal (M), and phosphate (PO), wherein in the fully lithiated state, the overall composition has a ratio of Li:M ranging from greater than about 1.0 to about 1.3, a ratio of (PO):M ranging from about 1.0 to about 1.132, M is one or more metals selected from the group consisting of Cr, Mn, Fe, Co, and Ni, and at least one phase includes an olivine lithium electroactive metal phosphate. In some instances, a composite cathode material including an electroactive olivine transition metal phosphate and a lithium and phosphate rich secondary phase is disclosed for use in a lithium ion battery.