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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 11018339 B1

PDFFull Text
Date of Patent:
May. 25, 2021

Filed:

Oct. 01, 2018

Positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing same, and nonaqueous electrolyte secondary battery using same

Applicant:

Basf Toda Battery Materials Llc, Tokyo, JP;

Inventors:

Akihisa Kajiyama, Sanyoonoda, JP;

Kazumichi Koga, Sanyoonoda, JP;

Tsuyoshi Wakiyama, Sanyoonoda, JP;

Ryuta Masaki, Sanyoonoda, JP;

Takayuki Yamamura, Sanyoonoda, JP;

Kazutoshi Matsumoto, Sanyoonoda, JP;

Assignee:

BASF TODA Battery Materials LLC, Tokyo, JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Sarah A Slifka

Int. Cl.
CPC ...
H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/131 (2010.01); H01M 4/1391 (2010.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/525 (2013.01); C01G 53/42 (2013.01); C01G 53/50 (2013.01); C01G 53/66 (2013.01); H01M 4/131 (2013.01); H01M 4/1391 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/60 (2013.01); C01P 2004/50 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01);
Abstract

A positive electrode active material comprises a Li-transition metal-layered oxide represented by the formula: Li(NiCoAlMe)O(in which Me=Mn, Mg, Ti, Ru, Zr, Nb, Mo, W; 1.00≤a≤1.15; 0.25<b<1; 0<c≤0.30; 0≤d≤0.05; 0≤e≤0.40), and is constituted of secondary particles formed by aggregation of primary particles. As to a compositional ratio of Li which is derived from unreacted substances or decomposed products in the secondary particles, a variation coefficient (Standard deviation value/Average value) of a Li-compositional ratio: Li/M (M=Ni+Co+Al+Me) is 30% or less. The positive electrode active material hardly deteriorates even if repeatedly charged/discharged, and enables stable charge/discharge, and then a non-aqueous electrolyte secondary battery is enabled to have an excellent output property and a long lifetime.

Find Patent Forward Citations

Kajiyama, Akihisa. (2021). Positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing same, and nonaqueous electrolyte secondary battery using same (U.S. Patent No. 11018339). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11018339

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