logo

For the Inventor, By the Inventor

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 10693123 B1

PDFFull Text
Date of Patent:
Jun. 23, 2020

Filed:

Aug. 06, 2015

Positive electrode and secondary battery using same

Applicant:

Nec Corporation, Tokyo, JP;

Inventors:

Makiko Takahashi, Tokyo, JP;

Takehiro Noguchi, Tokyo, JP;

Yuukou Katou, Tokyo, JP;

Assignee:

NEC Corporation, Tokyo, JP;

Attorney:

Wilmer Cutler Pickering Hale and Dorr LLP

Primary Examiner:

Laura Weiner

Int. Cl.
CPC ...
H01M 4/131 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/48 (2010.01); H01M 4/38 (2006.01); H01M 4/36 (2006.01); B60L 50/64 (2019.01); C01G 53/00 (2006.01); H01M 4/133 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 10/0585 (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 4/131 (2013.01); B60L 50/64 (2019.02); C01G 53/50 (2013.01); C01G 53/52 (2013.01); H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/38 (2013.01); H01M 4/48 (2013.01); H01M 4/505 (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 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 10/0585 (2013.01); C01P 2002/32 (2013.01); C01P 2006/40 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 4/386 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11); Y02T 10/7011 (2013.01);
Abstract

The present invention relates to a positive electrode comprising a Mn composite oxide having a tetragonal structure represented by formula (1): Li(MMnY)(OZ)(wherein 1<a≤2.6, 0≤x≤1.2, 0≤y, x+y<2, 0≤w≤1; M is at least one selected from the group consisting of Co, Ni, Fe, Cr and Cu; Y is at least one selected from the group consisting of Li, B, Na, Mg, Al, Ti, Si, K and Ca; Z is at least one of F or Cl; and a composite oxide having a layered structure represented by formula (2): Li(LiMY)O(wherein 0≤x<0.3, 0≤y<0.3; M is at least one selected from the group consisting of Co, Fe, Ni and Mn; Y is at least one selected from the group consisting of Mg, Al, Zr, Ti and Zn. According to the present invention, a lithium secondary battery having a high capacity and being excellent in cycle life can be provided.

Find Patent Forward Citations

Loading…