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Method for preparing three-dimensional metal lithium negative electrode by using MOFs derivative

A technology of metal lithium and derivatives, applied in negative electrodes, active material electrodes, lithium batteries, etc., can solve the problems of changing the lithophilicity of the substrate, poor lithophilicity, etc., to promote the pace of research and development and practice, high specific surface area, delay The effect of the initial nucleation time point

Pending Publication Date: 2022-03-01
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common three-dimensional network substrate materials (foamed nickel, copper foam, carbon cloth, etc.) Combining with strong lithium-philic groups to change the lithium-philicity of the substrate, so as to design some three-dimensional lithium anode structures with good lithium-philicity and stable electrochemical performance, and finally enable the uniform deposition of lithium ions

Method used

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  • Method for preparing three-dimensional metal lithium negative electrode by using MOFs derivative
  • Method for preparing three-dimensional metal lithium negative electrode by using MOFs derivative
  • Method for preparing three-dimensional metal lithium negative electrode by using MOFs derivative

Examples

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Embodiment 1

[0031] Example 1 Preparation of a three-dimensional metal lithium negative electrode:

[0032] The metal salt used is cobalt nitrate, the organic solvent is methanol, the organic ligand is 2-methylimidazole, and the three-dimensional porous skeleton is foam nickel.

[0033] S1, 1 mmol of hexahydrate (0.291 g) was dissolved in 25 mL of methanol, and the resulting solution was placed on a magnetic stirrer for stirring for 5-10 min;

[0034] S2, 4 mmol of 2-methylimidazole (0.328 g), in solution of S1, continued to stir well, to stand for 24 h, to give a methanol solution containing metal organic frame material ZIF-67;

[0035] S3, pretreatment of foam nickel: placed foam nickel, 5-10 ml of acetone, 5-10 ml of water, 5-10 ml deionized water, each ultrasound 10-15min, then placed in a vacuum drying tank at 60 ° C 1-2h;

[0036] S4, soak the pretreated foam nickel in methanol containing ZIF-67;

[0037] S5, the resulting mixed solution was placed on a magnetic stirrer for stirring for ...

Embodiment 2

[0041] Example 2 Battery performance test of three-dimensional metal lithium negative electrode

[0042] S1, the preparation of lithium lithium phosphate electrode sheet: First, use N-methylpyrrolidone (NMP) as a solvent, using LIFEPO 4 / Conductive carbon black / adhesive PVDF (mass ratio is 8: 1: 1) Preparation of iron phosphate electrode slurry. The resulting slurry was mixed for 20-30 min; the obtained uniform slurry was applied to the aluminum aggregate fluid, followed by vacuum 12 h at 120 ° C.

[0043] S2, in a glove box filled with argon (H 2 0, O 2 The order of the composite metal lithium negative electrode / commercial diaphragm / composite metal lithium negative electrode / commercial diaphragm / composite metal lithium magazine, the lithium-lithium magazine, and the full battery is prepared, respectively, and put it from blue The battery tester is tested at room temperature. The test results are respectively image 3 and Figure 4Indicated.

[0044] further, image 3 The ...

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Abstract

The invention discloses a method for preparing a three-dimensional metal lithium negative electrode by using an MOFs derivative. Preparing a metal organic framework material; mixing the pretreated three-dimensional porous skeleton with a metal organic framework material, so that the metal organic framework material uniformly grows on the three-dimensional porous skeleton; transferring into a muffle furnace for carbonization; and pouring the molten liquid metal lithium into the whole framework to obtain the novel three-dimensional metal lithium negative electrode. The electrode can be applied to a liquid lithium battery and a high-energy-density lithium-oxygen and lithium-sulfur solid-state battery, the local current density is effectively reduced, the growth of lithium dendrites is inhibited, the safety of the battery is improved, and the service life of the battery is prolonged. The method can effectively cope with the volume expansion of the lithium negative electrode, improve the interface stability of the electrode / electrolyte, the electrochemical performance of the electrode and the like, can also be applied to metal batteries with higher energy density, such as three-dimensional metal sodium negative electrode, zinc negative electrode, potassium negative electrode and the like, and further promotes the research, development and practice pace of high-safety power batteries.

Description

Technical field [0001] The present invention belongs to the technical collar of a lithium ion battery, and is specifically involved in a method of preparing a three-dimensional metal lithium negative electrode using a MOFS derivative. Background technique [0002] In recent years, micro-electronic equipment, energy storage and equipment, and new energy vehicles have put forward increasingly high requirements for energy density and safety of lithium-ion batteries to meet the needs of society. Traditional lithium ion batteries with carbon materials have not been able to meet the current demand for energy density, with metal lithium is the current general trend. [0003] In order to meet the high-than-power power battery, lithium metal battery is an inevitable trend. Since the metal lithium negative electrode has the highest energy density (3860 mAh / g) and the lowest potential (-3.04V. Vs. standard hydrogen electrode), metal lithium is an absolute advantage as a lithium battery an...

Claims

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Application Information

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IPC IPC(8): H01M4/1395H01M4/62H01M4/134H01M10/052H01M10/0525C08G83/00
CPCH01M4/1395H01M4/628H01M4/134H01M10/052H01M10/0525C08G83/008H01M2004/021H01M2004/027Y02E60/10
Inventor 魏涛陆佳豪张琪孙成周艳艳
Owner JIANGSU UNIV OF SCI & TECH
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