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. 03, 2015
Filed:
Mar. 24, 2014
Showa Denko K.k., Minato-ku, Tokyo, JP;
Akihisa Tonegawa, Yokohama, JP;
Akihiko Shirakawa, Chiba, JP;
Isao Kabe, Yokohama, JP;
Gaku Oriji, Kawasaki, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A method is employed for producing a positive electrode active material for a lithium secondary battery that comprises mixing lithium phosphate having a particle diameter Dof 100 μm or less, an M element-containing compound having a particle diameter Dof 100 μm or less (where, M is one type or two or more types of elements selected from the group consisting of Mg, Ca, Fe, Mn, Ni, Co, Zn, Ge, Cu, Cr, Ti, Sr, Ba, Sc, Y, Al, Ga, In, Si, B and rare earth elements) and water, adjusting the concentration of the M element with respect to water to 4 moles/L or more to obtain a raw material, and producing olivine-type LiMPOby carrying out hydrothermal synthesis using the raw material.