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. 16, 2012
Filed:
Mar. 10, 2006
Takeshi Kawasato, Chigasaki, JP;
Naoshi Saito, Chigasaki, JP;
Megumi Uchida, Chigasaki, JP;
Kazushige Horichi, Chigasaki, JP;
Koji Tatsumi, Chigasaki, JP;
Kunihiko Terase, Chigasaki, JP;
Manabu Suhara, Chigasaki, JP;
Takeshi Kawasato, Chigasaki, JP;
Naoshi Saito, Chigasaki, JP;
Megumi Uchida, Chigasaki, JP;
Kazushige Horichi, Chigasaki, JP;
Koji Tatsumi, Chigasaki, JP;
Kunihiko Terase, Chigasaki, JP;
Manabu Suhara, Chigasaki, JP;
AGC Seimi Chemical Co., Ltd., Chigasaki, JP;
Abstract
A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LiQNMOF(wherein Q is at least one element selected from the group consisting of titanium, zirconium, niobium and tantalum, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than Q and N, 0.9≦p≦1.1, 0≦q<0.03, 0.97≦x≦1.00, 0≦y<0.03, 1.9≦z≦2.1, q+x+y=1 and 0≦a≦0.02), which comprises firing a mixture of a lithium, Q element source and N element sources, and an M element source and/or fluorine source when these elements are present, in an oxygen-containing atmosphere, wherein the Q element source is a Q element compound aqueous solution having a pH of from 0.5 to 11.