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Lif particle, coating material, ceramic slurry, lithium battery and preparation method

A coating material and ceramic slurry technology, which is applied in the fields of coating materials, ceramic slurry, LiF particles, lithium batteries and its preparation, can solve the problems of not having the functional effect of improving the SEI film of the negative electrode of lithium batteries, and achieve the goal of improving the first Efficient play, improve cycle performance, inhibit the effect of excessive production

Active Publication Date: 2022-06-14
JIANGSU HORIZON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, ceramic coating only uses pure ceramic materials, and it does not have the functional role of improving the SEI film of lithium battery negative electrodes except for some traditional functions.

Method used

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  • Lif particle, coating material, ceramic slurry, lithium battery and preparation method
  • Lif particle, coating material, ceramic slurry, lithium battery and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The LiF (lithium fluoride) particles of Example 1 include: large particles and small particles doped; wherein the particle size of the large particles is D50: 0.5-1.5 μm; the particle size of the small particles is D50: 0.1 -0.5 μm, specifically, the purity of LiF particles ranges from 95% to 99%. The doping of large and small particles can make the coating layer of LiF more dense, and the small particles can fill the gaps between the large particles, and the coating effect is better.

[0024] In this Example 1, the mass ratio of the large particles to the small particles is 1:0.01-0.5, optionally 1:0.08 or 1:0.2 or 1:0.4.

[0025] In this Example 1, the large particles and the small particles are uniformly doped by a sand mill.

Embodiment 2

[0027] The second embodiment also provides a coating material, comprising: the above-mentioned LiF particles, and a ceramic material; wherein the LiF particles are coated on the periphery of the ceramic material to form a coating layer. LiF is the main F-containing component in the fluorinated SEI film, and LiF can help Li + It is deposited on the surface of the negative electrode to form an ordered and well-arranged cylindrical structure.

[0028] In this embodiment 2, the thickness of the coating layer is 0.1-20 μm, optionally 1 μm or 5 μm or 12 μm or 16 μm.

[0029] In this embodiment 2, the ceramic material includes: one or more of alumina, boehmite, magnesia, aluminum hydroxide, and barium sulfate.

[0030] The composition ratio of the LiF particles is the same as that in Example 1, and will not be repeated here.

Embodiment 3

[0032] In this embodiment 3, a ceramic slurry is also provided, comprising: the aforementioned coating material, a dispersant, CMC (carboxymethyl cellulose), a binder, a wetting agent and water.

[0033] In Example 3, the mass ratio of the coating material, dispersant, CMC, binder, and wetting agent is 1:0.003-0.007:0.005-0.015:0.03-0.07:1.0-2.0.

[0034] Optionally, the mass ratio of the coating material, dispersant, CMC, binder, and wetting agent is 1:0.004:0.01:0.05:1.5.

[0035] Optionally, the mass ratio of the coating material, dispersant, CMC, binder, and wetting agent is 1:0.006:0.008:0.04:1.8.

[0036] Optionally, the mass ratio of the coating material, dispersant, CMC, binder, and wetting agent is 1:0.005:0.012:0.06:1.2.

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Abstract

The invention belongs to the technical field of lithium batteries, and specifically relates to LiF particles, coating materials, ceramic slurry, lithium batteries and preparation methods, doping of large particles and small particles; wherein the particle size of the large particles is D50: 0.5-1.5 μm; the particle size of the small particles is D50: 0.1-0.5 μm, LiF particles, coating materials, ceramic slurry, lithium batteries and preparation methods are made by coating ceramic materials with LiF particles doped with large and small particles The new diaphragm coated with the prepared slurry can inhibit the excessive formation of SEI film, reduce the consumption of active lithium, improve the first effect of lithium battery capacity, and improve cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and specifically relates to LiF particles, coating materials, ceramic slurry, lithium batteries and preparation methods. Background technique [0002] At present, ceramic coating only uses pure ceramic materials, and does not have the functional effect of improving the SEI film of lithium battery negative electrode except for some traditional functions. [0003] In order to solve the above problems, it is necessary to design LiF particles, coating materials, ceramic slurry, lithium batteries and preparation methods. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide LiF particles, coating materials, ceramic slurry, lithium batteries and preparation methods. [0005] In order to solve the above technical problems, the present invention provides a LiF particle, comprising: large particles and small particles doped; wherein the particle size of the larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/434H01M50/449H01M50/403H01M10/052
CPCH01M10/052H01M50/431H01M50/461H01M50/403Y02E60/10
Inventor 王成豪李正林翁星星陈朝晖贡晶晶
Owner JIANGSU HORIZON NEW ENERGY TECH CO LTD
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