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:
Oct. 21, 2014
Filed:
Sep. 20, 2006
Shigeto Okada, Fukuoka, JP;
Tomoyuki Shiratsuchi, Ohnojo, JP;
Tomoko Iwanaga, Fukuoka, JP;
Jun-ichi Yamaki, Kasuga, JP;
Shinji Iizuka, Shibukawa, JP;
Osamu Omae, Shibukawa, JP;
Kumiko Sueto, Shibukawa, JP;
Takeshi Shimada, Shibukawa, JP;
Shigeto Okada, Fukuoka, JP;
Tomoyuki Shiratsuchi, Ohnojo, JP;
Tomoko Iwanaga, Fukuoka, JP;
Jun-ichi Yamaki, Kasuga, JP;
Shinji Iizuka, Shibukawa, JP;
Osamu Omae, Shibukawa, JP;
Kumiko Sueto, Shibukawa, JP;
Takeshi Shimada, Shibukawa, JP;
Kanto Denka Kogyo Co., Ltd., Tokyo, JP;
Kyushu University, National University Corporation, Fukuoka, JP;
Abstract
The present invention provides a positive electrode active material that has rate characteristics suitable for nonaqueous electrolyte batteries and particularly nonaqueous electrolyte secondary batteries, a method by which this positive electrode active material can be easily mass produced, and a high-performance nonaqueous electrolyte battery that has a positive electrode active material obtained by this method. The present invention relates to a method of producing a positive electrode active material, the method comprising a step of mixing a carbon source with lithium manganese phosphate LiMnPOor a compound LiMnMPO(where, 0≦x<1 and M is at least one metal element selected from the group consisting of Co, Ni, Fe, Zn, Cu, Ti, Sn, Zr, V, and Al) containing lithium manganese phosphate LiMnPOas a solid solution composition, and heat treating the obtained mixture under an inert gas atmosphere.