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:
Mar. 17, 2009
Filed:
Jun. 06, 2003
Koji Tatsumi, Chigasaki, JP;
Manabu Suhara, Chigasaki, JP;
Naoshi Saito, Chigasaki, JP;
Kazushige Horichi, Chigasaki, JP;
Yukio Jitsugiri, Chigasaki, JP;
Koji Tatsumi, Chigasaki, JP;
Manabu Suhara, Chigasaki, JP;
Naoshi Saito, Chigasaki, JP;
Kazushige Horichi, Chigasaki, JP;
Yukio Jitsugiri, Chigasaki, JP;
Seimi Chemical Co., Ltd., Chigasaki-shi, Kanagawa-ken, JP;
Abstract
There is obtained a material of a positive electrode for a secondary lithium-ion cell having high cycle durability and high safety in high-voltage and high-capacity applications, which is a particulate positive electrode active material for a secondary lithium-ion cell represented by a general formula, LiCOABOF(A is Al or Mg, B is a group-IV transition element, 0.90≦a≦1.10, 0.97≦b≦1.00, 0.0001≦c≦0.03, 0.0001≦d≦0.03, 1.98≦e≦2.02, 0≦f≦0.02, and 0.0001≦c+d≦0.03), where element A, element B and fluorine are evenly present in the vicinity of the particle surfaces.