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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 12424609 B1

PDFFull Text
Date of Patent:
Sep. 23, 2025

Filed:

Sep. 04, 2020

Method for pre-sodiation of negative electrode, pre-sodiated negative electrode, and lithium secondary battery comprising same

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Oh-Byong Chae, Daejeon, KR;

Ye-Ri Kim, Daejeon, KR;

Seung-Hae Hwang, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Ula C Ruddock

Assistant Examiner:

Mary Grace Byram

Int. Cl.
CPC ...
H01M 4/04 (2006.01); H01M 4/13 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/139 (2010.01); H01M 4/1395 (2010.01); H01M 4/587 (2010.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01); H01M 10/056 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/0459 (2013.01); H01M 4/0445 (2013.01); H01M 4/13 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/139 (2013.01); H01M 4/1395 (2013.01); H01M 4/587 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01); H01M 10/056 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2300/0025 (2013.01);
Abstract

A method for pre-sodiation of a negative electrode, including the steps of: interposing a separator between a sodium ion-supplying metal sheet and a negative electrode to prepare a simple cell; dipping the simple cell in an electrolyte for pre-sodiation; and electrochemically charging the simple cell dipped in the electrolyte for pre-sodiation to carry out pre-sodiation of the negative electrode wherein the electrochemical charging is carried out while the simple cell is pressurized under a pressure of from 100 kPa to 1,000 kPa. A pre-sodiated negative electrode is also disclosed, including: a current collector; a negative electrode active material layer on at least one surface of the current collector. The negative electrode active material layer includes a negative electrode active material; and a coating layer on the surface of the negative electrode active material layer. The coating layer includes Na-carbonate and Na.

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