Method for preparing negative electrode of lithium battery and lithium battery

A technology for lithium batteries and negative electrodes, applied in the field of preparation of lithium batteries and negative electrodes of lithium batteries, can solve the problems of loss of active materials and electrolytes, continuous growth of dendrites, poor electrochemical performance of batteries, etc., so as to increase safety and inhibit dendrites. Growth, the effect of increasing energy density

Inactive Publication Date: 2019-05-03
成都格力钛新能源有限公司 +1
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Problems solved by technology

[0005] In view of this, one of the objects of the present invention is to provide a preparation method of a lithium battery negative electrode and a lithium battery, to solve the problems existing in the prior art that the dendrites in the lithium battery continue to grow during the charging process, easily puncture the diaphragm, and there is a safety problem. The problem of hidden dangers, and the continuous loss of active materials and electrolytes in the electrodes of the battery, resulting in poor electrochemical performance of the battery

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  • Method for preparing negative electrode of lithium battery and lithium battery
  • Method for preparing negative electrode of lithium battery and lithium battery
  • Method for preparing negative electrode of lithium battery and lithium battery

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[0038] The present invention is described below based on the embodiments, and those skilled in the art should understand that the drawings provided here are for the purpose of illustration, and the drawings are not necessarily drawn to scale.

[0039] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0040] This application proposes a method for preparing a negative electrode of a lithium battery. By arranging a porous coating on the surface of the lithium metal of the negative electrode of a lithium battery, the growth of lithium metal dendrites in the process of charging and discharging the battery can be effectively inhibited, thereby improving the electrochemical performance of the battery. performance.

[0041] Such as figure 1 As shown, the application provid...

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Abstract

The invention provides a method for preparing a negative electrode of a lithium battery and the lithium battery. The negative electrode of a lithium battery comprises lithium metal. The preparation method comprises a step of setting a porous coating on the surface of the lithium metal, and the porous coating is used for suppressing the growth of lithium metal dendrites. The safety of the lithium metal of the lithium battery as the negative electrode is increased, the energy density of the lithium battery is greatly raised, and the commercialization of the metal lithium as a material for the negative electrode of the lithium battery is advantageously supported.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a negative electrode of a lithium battery and the lithium battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life, and environmental friendliness. Therefore, they have not only been widely used in the 3C digital field, but also developed rapidly in the field of electric vehicles in recent years. [0003] At present, widely used lithium-ion batteries use flammable liquid electrolytes, which can irreversibly react with lithium ions during battery charging and discharging, thereby forming a solid electrolyte interphase (SEI). This process not only leads to the loss of active materials and electrolytes in the electrodes of the battery, but also reduces the Coulombic efficiency, resulting in poor electrochemical performance of the battery. In addition, the growth of lithium dendrites is easy to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1395H01M10/42H01M10/052
CPCY02E60/10
Inventor 吴锐徐冬阳李静李利军
Owner 成都格力钛新能源有限公司
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