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:
May. 25, 2010
Filed:
May. 27, 2008
Applicants:
Quan Dai, Shenzhen, CN;
Julin Shen, Shenzhen, CN;
Inventors:
Quan Dai, Shenzhen, CN;
Julin Shen, Shenzhen, CN;
Assignee:
BYD Company Limited, , CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 15/16 (2006.01); C01B 25/26 (2006.01); H01M 4/485 (2010.01);
U.S. Cl.
CPC ...
Abstract
Lithium iron phosphate cathode materials for lithium secondary batteries and methods of preparation thereof are disclosed. Better cathode materials may be produced by multiple annealing and/or heating steps. The annealing step can be carried out before and/or after the heating steps to provide cathode materials, which exhibit superior electrical properties. In some instances, divalent iron compounds are incorporated as starting materials.