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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 11695170 B1

PDFFull Text
Date of Patent:
Jul. 04, 2023

Filed:

Dec. 31, 2019

Battery-level ni—co—mn mixed solution and preparation method for battery-level mn solution

Applicants:

Jingmen Gem Co., Ltd, Hubei, CN;

Gem Co., Ltd, Guangdong, CN;

Inventors:

Kaihua Xu, Guangdong, CN;

Zhenkang Jiang, Guangdong, CN;

Qinxiang Li, Hubei, CN;

Kun Zhang, Hubei, CN;

Wenjie Wang, Hubei, CN;

Jun Wang, Hubei, CN;

Shihong Wen, Hubei, CN;

Assignees:

JINGMEN GEM CO., LTD, Hubei, CN;

GEM CO., LTD, Guangdong, CN;

Attorney:

Barnes & Thornburg LLP

Primary Examiner:

Melissa S Swain

Int. Cl.
CPC ...
C01D 15/04 (2006.01); C01F 5/28 (2006.01); H01M 10/54 (2006.01); C01F 11/22 (2006.01); C01G 45/00 (2006.01); C01G 51/00 (2006.01); C01G 53/00 (2006.01); C22B 3/00 (2006.01); C22B 47/00 (2006.01);
U.S. Cl.
CPC ...
H01M 10/54 (2013.01); C01D 15/04 (2013.01); C01F 5/28 (2013.01); C01F 11/22 (2013.01); C01G 45/003 (2013.01); C01G 51/003 (2013.01); C01G 53/003 (2013.01); C22B 23/0453 (2013.01); C22B 47/00 (2013.01);
Abstract

Provided are a battery-level Ni—Co—Mn mixed solution and a preparation method for a battery-level Mn solution, the steps thereof comprising: acid dissolution (S), alkalization to remove impurities (S), synchronous precipitation of calcium, magnesium, and lithium (S), deep ageing to remove impurities (S), synergistic extraction (S), and refining extraction (S). The steps of deep ageing to remove impurities (S) and synergistic extraction (S) comprise: performing deep ageing on a filtrate obtained from the step of synchronous precipitation of calcium, magnesium, and lithium (S), and after performing filtration to remove impurities, obtaining an aged filtrate; using P204 to extract the aged filtrate and obtain a loaded organic phase, and subjecting the loaded organic phase to staged back-extraction to obtain the battery-level Ni—Co—Mn mixed solution and a Mn-containing solution. By means of the cooperation between the multiple process steps of synchronous precipitation of calcium, magnesium, and lithium (S), deep ageing to remove impurities (S), and synergistic extraction (S), the impurity content of the obtained battery-level Ni—Co—Mn mixed solution is significantly lowered, and the battery-level Ni—Co—Mn mixed solution can be directly used to prepare a lithium battery ternary precursor material. At the same time, the battery-level Mn solution can also be obtained, which is favorable for large-scale applications of the process and increasing economic benefits.

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