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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 9847525 B1

PDFFull Text
Date of Patent:
Dec. 19, 2017

Filed:

Oct. 26, 2012

Lithium nickel cobalt manganese oxide positive active material having concentration gradient of nickel, cobalt, and manganese and precursor thereof and preparation methods

Applicant:

Shanghai Pylon Technology Co., Ltd., Shanghai, CN;

Inventors:

Jun Zhang, Shanghai, CN;

Jian Guo, Shanghai, CN;

Lianqi Zhang, Shanghai, CN;

Ruijuan Yang, Shanghai, CN;

Peiyu Hou, Shanghai, CN;

Assignee:

Hubei ZTE Advanced Materials Co., Ltd., Hubei, CN;

Attorney:

Baker Hostetler LLP

Primary Examiner:

Sean P Cullen

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/505 (2010.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); H01M 4/0402 (2013.01); H01M 4/1391 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2220/20 (2013.01); H01M 2220/30 (2013.01);
Abstract

A precursor of a modified ternary material for a lithium ion battery positive material belongs to the technical field of application of lithium ion battery positive materials. A molecular formula of the precursor is: (NiCoMn)(OH), and the precursor consists of three layers. An inner layer of the precursor is a ternary material with the Co content of more than ⅓ and equal Ni and Mn content, and the molecular formula of the inner layer of the precursor is: (NiCol/Mn(OH), where 0<x<⅓. An outer layer of the precursor is a ternary material with the Co content of greater than 0 to ⅓ and equal Ni and Mn content, and the molecular formula of the outer layer of the precursor is: (NiCoMn)(OH), where 0<y<⅙. An intermediate layer of the precursor is a concentration gradient composite material of the two materials of the inner layer and the outer layer of the precursor. The modified ternary material containing the precursor has the chemical formula of Li(NiCoMn)O. The inside of each microscopic particle of the ternary material consists of three parts, namely, an inner layer, an intermediate layer and an outer layer. The present invention effectively improves the cyclic stability, thermal stability and compacted density, and has a high cost-performance advantage.

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