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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 10340521 B1

PDFFull Text
Date of Patent:
Jul. 02, 2019

Filed:

Feb. 13, 2015

Non-aqueous electrolyte secondary battery

Applicant:

Sanyo Electric Co., Ltd., Daito-shi, Osaka, JP;

Inventors:

Atsushi Ogata, Osaka, JP;

Yoshiyuki Muraoka, Osaka, JP;

Katsunori Yanagida, Hyogo, JP;

Masanobu Takeuchi, Osaka, JP;

Fumiharu Niina, Hyogo, JP;

Assignee:

SANYO Electric Co., Ltd., Daito-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Wojciech Haske

Int. Cl.
CPC ...
H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0569 (2010.01); H01M 4/131 (2010.01); H01M 10/0567 (2010.01); H01M 4/133 (2010.01); H01M 10/0525 (2010.01); H01M 2/16 (2006.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0568 (2010.01); H01M 10/0587 (2010.01); H01M 4/485 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 4/1393 (2010.01);
U.S. Cl.
CPC ...
H01M 4/505 (2013.01); H01M 2/1653 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/485 (2013.01); H01M 4/525 (2013.01); H01M 4/587 (2013.01); H01M 4/623 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 10/0587 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2220/30 (2013.01); H01M 2300/0034 (2013.01); H01M 2300/0042 (2013.01);
Abstract

An object of the invention is to provide a nonaqueous electrolyte secondary battery having good cycle characteristics. The nonaqueous electrolyte secondary battery of the present invention includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a layered lithium transition metal oxide, and the positive electrode active material has a crystallite size of 140 nm or less. The negative electrode active material contains at least carbon, and the nonaqueous electrolyte contains 2 to 30% by volume of fluoroethylene carbonate.

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