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:
Jun. 01, 2011
Motoaki Nishijima, Osaka, JP;
Koji Ohira, Osaka, JP;
Toshitsugu Sueki, Osaka, JP;
Shougo Esaki, Osaka, JP;
Isao Tanaka, Kyoto, JP;
Yukinori Koyama, Kyoto, JP;
Katsuhisa Tanaka, Kyoto, JP;
Koji Fujita, Kyoto, JP;
Shunsuke Murai, Kyoto, JP;
Motoaki Nishijima, Osaka, JP;
Koji Ohira, Osaka, JP;
Toshitsugu Sueki, Osaka, JP;
Shougo Esaki, Osaka, JP;
Isao Tanaka, Kyoto, JP;
Yukinori Koyama, Kyoto, JP;
Katsuhisa Tanaka, Kyoto, JP;
Koji Fujita, Kyoto, JP;
Shunsuke Murai, Kyoto, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides a method for producing a lithium-containing composite oxide represented by general formula (1) below, the method at least including a step of preparing a solution by dissolving a lithium source, an element M source, a phosphorus source, and an element X source that serve as source materials in a solvent, the phosphorus source being added after at least the element M source is dissolved; a step of gelating the resulting solution; and a step of calcining the resulting gel:LiMPXO  (1)(where M represents at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al, and Y; X represents at least one element selected from the group consisting of Si and Al; and 0<x≦2, 0.8≦y≦1.2, 0≦z≦1). According to the present invention, a positive electrode active material for lithium secondary batteries that offers high safety and high cost efficiency and are capable of extending battery life can be provided.