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. 31, 2015
Filed:
Jul. 12, 2011
Atsushi Sano, Tokyo, JP;
Keitaro Otsuki, Tokyo, JP;
Kouji Tokita, Tokyo, JP;
Tomohiko Kato, Tokyo, JP;
Akiji Higuchi, Kyoto, JP;
Atsushi Sano, Tokyo, JP;
Keitaro Otsuki, Tokyo, JP;
Kouji Tokita, Tokyo, JP;
Tomohiko Kato, Tokyo, JP;
Akiji Higuchi, Kyoto, JP;
TDK Corporation, Tokyo, JP;
Abstract
To provide an active material from which a sufficient discharge capacity is obtained, an electrode containing the active material, a lithium secondary battery including the electrode, and a method for making an active material. A method for making an active material includes a temperature elevation step of heating a mixture containing a lithium source, a pentavalent vanadium source, a phosphoric acid source, water, and a reductant in a hermetically sealed container at a temperature elevation rate T1 from 25° C. to 110° C. and then at a temperature elevation rate T2 from 110° C. to a designated temperature of 200° C. or more, in which T1>T2; T1=0.5 to 10° C./min; and T2=0.1 to 2.2° C./min.