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Microporous lithium foil production method and device

A production method and production device technology, applied in the field of microporous lithium foil production method and device, to achieve the effect of improving stability and stable and uniform coating process

Pending Publication Date: 2022-02-18
CHINA ENERGY LITHIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the development of society and the advancement of science and technology, the requirements for the energy density and cycle life of lithium batteries are getting higher and higher. However, the current lithium-ion batteries with graphite as the negative electrode cannot meet the expectations of the society, so it is necessary to develop new types with higher specificity. Positive and negative electrode materials with capacity

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  • Microporous lithium foil production method and device
  • Microporous lithium foil production method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0056] Example 1: A microporous lithium foil with a porosity of about 20% was prepared by using a PET film as the substrate to be coated.

[0057] refer to figure 1 , execute step S1, provide lithium liquid and inert gas, lithium liquid in this embodiment is the metal lithium liquid prepared after melting the battery-grade metal lithium with a purity of 99.9% or more, and the inert gas is high-purity argon with a purity of 99.999% or more; execute Step S2, mix argon gas into the lithium liquid, and control the volume ratio of argon gas and lithium liquid to 1:4; execute step S3, heat and keep warm the lithium liquid mixed with argon gas, and the heating temperature is 300°C; execute step S4 , provide the base material to be coated, the base material to be coated provided in the present embodiment is polyethylene terephthalate (PET) film, width 300mm, thickness is 50 μ m; Execute step S5, PET film is cooled , so that the cooling temperature is -20°C; Execute step S6, apply the...

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Abstract

The invention discloses a microporous lithium foil production method and device. The production method of the microporous lithium foil comprises the following steps: providing lithium liquid and inert gas; mixing inert gas into the lithium liquid, and then carrying out heating / heat preservation on the mixed lithium liquid; providing a base material to be coated, and cooling the base material to be coated; coating the cooled base material with the lithium liquid mixed with the inert gas in a coating manner, so that the lithium liquid mixed with the inert gas is rapidly solidified into a foil material, and the inert gas part in the lithium liquid forms tiny pores; and continuously moving the base material while coating to obtain the continuous microporous lithium foil strip. The microporous lithium foil prepared by the method is uniform in thickness; compared with a common lithium foil, the lithium foil has lower lithium loading capacity under the condition of the same thickness, the lithium supplementing amount can be accurately controlled, and electrolyte can rapidly permeate to dissolve lithium metal.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a production method and device for a microporous lithium foil. Background technique [0002] Lithium batteries are widely used in aerospace, computers, mobile communication equipment, robots and electric vehicles due to their advantages of high energy density, long cycle life and wide temperature range. With the development of society and the advancement of science and technology, the requirements for the energy density and cycle life of lithium batteries are getting higher and higher. At present, lithium-ion batteries with graphite as the negative electrode are difficult to meet the expectations of the society, so it is necessary to develop new types with higher specificity. Capacitive positive and negative electrode materials. For the negative electrode material, the pre-lithiation work can effectively improve the specific energy of the battery and increase the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C9/14B05C5/02B05C11/10B05C13/02B05D1/26H01M4/04H01M4/1395
CPCH01M4/1395H01M4/0409B05D1/26B05C5/0245B05C9/14B05C11/1036B05C13/02H01M2004/027Y02E60/10
Inventor 齐大志程滋平陈强牟瀚波吴春敢刘慧芳
Owner CHINA ENERGY LITHIUM
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