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Method for pre-lithiating anode electrode

A pre-lithiation and negative electrode technology, applied in the field of pre-lithiation negative electrodes, can solve the problems of high probability and difficulty in controlling the reaction volume

Active Publication Date: 2015-12-23
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In addition, in the conventional pre-lithiation method, since the anode is impregnated with lithium only when the lithium foil and the anode pass between the upper and lower rolls, it is difficult to control the reaction amount and the probability of uncharged lithium is high

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  • Method for pre-lithiating anode electrode

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Embodiment Construction

[0046] As described above, according to the method of pre-lithiation of the negative electrode of the present invention, the surface of the negative electrode is lithiated by immersing the roll formed by rolling the negative electrode and copper (Cu) foil together in the electrolytic solution, the copper ( Cu) foil was rolled with metallic Lithium (Li) on both sides.

[0047] The inventors of the present application have confirmed that by lithifying the surface of the negative electrode by immersing a roll formed by rolling the negative electrode and copper (Cu) foil together into the electrolytic solution, the lithium foil is completely separated from the negative electrode without performing the separation process. It is recycled under certain conditions, whereby the efficiency can be improved by shortening the process time, the reaction amount of lithium can be easily controlled, the irreversibility of the negative electrode is improved through the process, the capacity of t...

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Abstract

The present invention relates to a method for pre-lithiating an anode electrode, and specifically provides a method for pre-lithiating an anode electrode, in which a roll formed by rolling together an anode electrode and copper (Cu) foil to which metal Lithium (Li) is rolled on both surfaces thereof is submerged in an electrolyte solution to pre-lithiate the surface of the anode electrode.

Description

technical field [0001] The invention relates to a method for pre-lithiation negative electrode. Background technique [0002] With the continuous development and increasing demand for mobile device technology, the demand for secondary batteries as energy sources has increased dramatically. Among these secondary batteries, lithium secondary batteries having high energy density and voltage as well as long cycle life and low self-discharge rate are commercially available and widely used. [0003] Since conventional lithium secondary batteries use compounds in which lithium is intercalated such as LiCoO 2 , LiMn 2 o 4 etc. as the positive electrode, so a battery is manufactured using a carbon electrode that does not contain lithium as the negative electrode. In the carbon electrode, a passivation film is formed on the surface of the carbon electrode during the first charge. The film suppresses a decomposition reaction by distributing in such a manner that an organic solvent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/587H01M10/0567H01M4/505
CPCH01M4/0404H01M4/0416H01M4/0435H01M4/139H01M4/505H01M4/587H01M10/052Y02E60/10H01M10/0525H01M10/0567H01M4/386H01M4/582H01M4/5825H01M4/661H01M10/0568H01M10/0569H01M2220/20H01M2300/0028Y02T10/70
Inventor 严仁晟金帝暎金锡九权芝允河会珍吴世橒
Owner LG ENERGY SOLUTION LTD