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Pre-lithiation reaction chamber apparatus

A pre-lithiation and reaction chamber technology, which is applied in the field of pre-lithiation reaction chamber equipment, can solve the difficult problems of drying chamber water content and control, achieve excellent initial Coulombic efficiency and cycle capacity retention, and suppress damage.

Pending Publication Date: 2021-11-12
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the process of introducing the pre-lithiation reactor into the drying chamber, etc., it is difficult to control the water content in the drying chamber to a level of less than 10 ppm

Method used

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Examples

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Embodiment 1

[0098]

[0099] First, 95% by weight of graphite as a negative electrode active material, as 5% by weight of DENKABLACK, as a binder, as a thickener, 1.5 as a thickener The weight% of CMC was added to the water to prepare a negative slurry. The negative slurry was applied to the copper collector and vacuum dried at 120 ° C, and then pressed, thereby obtaining a negative electrode.

[0100]

[0101] In order to use the negative electrode (5 × 5 cm 2 ) And as a lithium metal of the electrodes performed pre-lithium-containing mixed organic solvents containing dissolved in a mixed organic solvent dissolved in carbonate (EC) / carbonate (EMC) = 1 / 9 (volume ratio). M LIPF 6 Electrolyte.

[0102]

[0103] As a pipette, prepare figure 2 The container made of SUS is made and has a cube shape on the top side opening, and the rotating shaft is mounted on the inner wall of the container and mounted a position change member having a helix formed on the rotating shaft. Then, 100 g of pentoxi...

Embodiment 2

[0109] Pre-lithiuming is performed in the same manner as in Example 1 to provide a pre-lithiuming negative electrode, and the difference is that 2 mA / cm is applied in the pre-lithiuming step. 2 Current density. The lithium secondary battery is obtained using this pre-lithiuming negative electrode.

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Abstract

The present invention relates to a pre-lithiation reaction chamber apparatus comprising a pre-lithiation reactor capable of preventing adverse effects caused by moisture that can be generated during a pre-lithiation reaction, and the pre-lithiation reactor comprises an electrolyte solution, an anode for a lithium secondary battery, and a lithium ion providing-member, wherein at least a portion of each of the anode for a lithium secondary battery and the lithium ion-providing member continues to come in contact with the electrolyte solution, the electrolyte solution comprises lithium salt, the reaction chamber comprises a moisture-capturing member, and the moisture-capturing member comprises: a moisture-capturing powder; a container receiving the moisture-capturing powder therein; and a position changing member for changing the position of the moisture-capturing powder within the container.

Description

Technical field [0001] The present disclosure relates to a pre-lithiation reaction chamber device. [0002] This application claims priority to Korean Patent Application No. 10-2019-0110757 on September 6, 2019 filed in Korea by reference the disclosure of which is incorporated herein. Background technique [0003] In the field of lithium secondary batteries, the pre-process means to the lithium electrode, particularly a negative electrode lithiated preliminary process to a predetermined level. [0004] like figure 1 As shown in this pre-process is performed, such as lithiation reaction vessel 210 or the like 200, the vessel containing the electrolyte comprising a lithium negative electrode 230 and the source 220 and lithium metal 240 in contact with each other. 200 prelithiation reactor 100 is provided in the drying chamber such as a reaction chamber of the apparatus. [0005] Typically, after the pre-configured for the lithiation reactor introduced into the drying chamber, pre-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/04H01M4/139
CPCH01M10/0525H01M4/139H01M4/04H01M10/052Y02E60/10H01M4/1393H01M4/1395H01M4/0445H01M4/0459H01M2004/027
Inventor 黄丞彗金睿利蔡午秉
Owner LG ENERGY SOLUTION LTD
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