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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.:

US 9221693 B1

PDFFull Text
Date of Patent:
Dec. 29, 2015

Filed:

Oct. 04, 2011

Method for producing positive electrode active material for lithium ion batteries and positive electrode active material for lithium ion batteries

Applicants:

Yasuhiro Kawahashi, Kitaibaraki, JP;

Yoshio Kajiya, Kitaibaraki, JP;

Inventors:

Yasuhiro Kawahashi, Kitaibaraki, JP;

Yoshio Kajiya, Kitaibaraki, JP;

Assignee:

JX Nippon Mining & Metals Corporation, Tokyo, JP;

Attorney:

Nields, Lemack & Frame, LLC

Primary Examiner:

Peter F Godenschwager

Assistant Examiner:

Andrew J Oyer

Int. Cl.
CPC ...
C01G 53/00 (2006.01); H01M 4/131 (2010.01); H01M 4/1391 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01);
U.S. Cl.
CPC ...
C01G 53/50 (2013.01); H01M 4/131 (2013.01); H01M 4/1391 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2006/40 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11);
Abstract

The present invention provides a method for producing a high quality positive electrode active material for lithium ion batteries at low cost and at excellent production efficiency. The method for producing a positive electrode active material for lithium ion batteries includes a step of firing a powder of lithium-containing carbonate that is a precursor for positive electrode active material for lithium ion batteries in a rotary kiln. In the step, a temperature at a powder feed part inside of the rotary kiln is kept at 500° C. or more.

Find Patent Forward Citations

Kawahashi, Yasuhiro. (2015). Method for producing positive electrode active material for lithium ion batteries and positive electrode active material for lithium ion batteries (U.S. Patent No. 9221693). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9221693

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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