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:
Apr. 12, 2005
Filed:
Oct. 29, 2001
Yuan Gao, Monroe, NJ (US);
Marina Yakovleva, Gastonia, NC (US);
Michael E. Leonowicz, Charlotte, NC (US);
Prakash Palepu, Gastonia, NC (US);
John F. Engel, Belmont, NC (US);
Yuan Gao, Monroe, NJ (US);
Marina Yakovleva, Gastonia, NC (US);
Michael E. Leonowicz, Charlotte, NC (US);
Prakash Palepu, Gastonia, NC (US);
John F. Engel, Belmont, NC (US);
FMC Corporation, Philadelphia, PA (US);
Abstract
The present invention is a positive electrode active material that can be used in secondary lithium and lithium-ion batteries to provide the power capability, i.e., the ability to deliver or retake energy in short periods of time, desired for large power applications such as power tools, electric bikes and hybrid electric vehicles. The positive electrode active material of the invention includes at least one electron conducting compound of the formula LiM{A}Oand at least one electron insulating and lithium ion conducting lithium metal oxide, wherein Mis a transition metal, {A} is represented by the formula ΣwBwherein Bis an element other than Mused to replace the transition metal Mand wis the fractional amount of element Bin the total dopant combination such that Σw=1; Bis a cation in LiM{A}O; 0.95≦x≦2.10; 0≦y≦x/2; and 1.90≦z≦4.20. Preferably, the lithium metal oxide is LiAlOor LiMOwherein Mis at least one tetravalent metal selected from the group consisting of Ti, Zr, Sn, Mn, Mo, Si, Ge, Hf, Ru and Te. The present invention also includes methods of making this positive electrode active material.