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Method for manufacturing lithium-ion cell and lithium-ion cell

A lithium-ion battery and a manufacturing method technology, which are applied in the direction of electrolyte storage battery manufacturing, electrode manufacturing, lithium storage battery, etc., can solve the problems of abnormal heating and ignition of lithium-ion batteries.

Pending Publication Date: 2021-05-14
ELIIY POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, lithium-ion batteries may generate abnormal heat or catch fire.

Method used

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  • Method for manufacturing lithium-ion cell and lithium-ion cell
  • Method for manufacturing lithium-ion cell and lithium-ion cell
  • Method for manufacturing lithium-ion cell and lithium-ion cell

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Embodiment Construction

[0031] The method for producing a lithium ion battery of the present invention is characterized in that it includes a step of impregnating a porous positive electrode active material layer or a porous negative electrode active material layer with an ionic liquid electrolyte comprising an anion and a cation. The ionic liquid and the lithium salt dissolved in the ionic liquid, the anion is a bis(fluorosulfonyl)imide ion, and the lithium salt is lithium bis(fluorosulfonyl)imide or bis(trifluorosulfonyl)imide Methanesulfonyl)imide lithium, the ionic liquid electrolyte contains the lithium salt at a concentration of 1.6 mol / L or more and 3.2 mol / L or less, and the step of impregnating the ionic liquid electrolyte is at a temperature of 50°C The step of impregnating the positive electrode active material layer or the negative electrode active material layer with the ionic liquid electrolyte at a temperature of the above temperature or lower than 100°C.

[0032] The step of impregnat...

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Abstract

This method for manufacturing a lithium-ion cell comprises the step of impregnating a porous positive electrode active material layer or a porous negative electrode active material layer with an ionic liquid electrolyte. The ionic liquid electrolyte contains an ionic liquid comprising anions and cations and a lithium salt dissolved in the ionic liquid. The anion is bis(fluorosulfonyl)imide ion. The lithium salt is lithium bis(fluorosulfonyl)imide or lithium bis(trifluoromethanesulfonyl)imide. The ionic liquid electrolyte contains the lithium salt at a concentration of 1.6 to 3.2 mol / L. The step of impregnation with the ionic liquid electrolyte is a step of immersing the positive electrode active material layer or the negative electrode active material layer in the ionic liquid electrolyte at a temperature of 50 DEG C to 100 DEG C.

Description

technical field [0001] The invention relates to a manufacturing method of a lithium ion battery and the lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in electronic / electrical devices such as smartphones and notebook computers due to their high energy density. In a lithium ion battery, a flammable nonaqueous electrolyte solution in which a lithium salt is dispersed in a nonaqueous solvent is generally used as the electrolyte solution. In addition, in lithium ion batteries, heat may be generated by overcharging, a short circuit between the positive electrode and the negative electrode, and the like. Furthermore, the positive electrode active material may release oxygen in crystals due to thermal decomposition, overcharging, and the like. Therefore, lithium ion batteries may generate abnormal heat or catch fire. [0003] In order to prevent accidents caused by abnormal heat generation and ignition, it has been proposed to use ionic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/13H01M4/62H01M10/052H01M10/0568
CPCH01M10/0568H01M4/62H01M10/0583Y02E60/10Y02P70/50H01M4/139H01M2300/0045H01M10/0525H01M2004/021H01M4/0416H01M10/0566H01M10/058H01M10/0569H01M2300/0025
Inventor 古谷亮太原富太郎
Owner ELIIY POWER