Preparation method of nano-silver particle dispersed Li*Ti*O* thin film lithium ion battery negative electrode

A lithium-ion battery and nano-silver particle technology, which is applied in the field of electrochemistry, can solve the problems of low electronic conductivity performance, poor high current charge and discharge performance, etc., and achieve the effects of improving electronic conductivity, dense film and excellent cycle performance.

Inactive Publication Date: 2009-12-23
大连德润达实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Li 4 Ti 5 o 12 It is an insulator material, the electronic conductivity is very low, and the high current charge and discharge performance is very poor

Method used

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  • Preparation method of nano-silver particle dispersed Li*Ti*O* thin film lithium ion battery negative electrode

Examples

Experimental program
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Effect test

example 1

[0016] Weigh a certain amount of lithium acetylacetonate and isopropyl titanate, dissolve them in the organic solvent butanol, stir the mixture evenly to obtain liquid A; then weigh a certain amount of deionized water, glacial acetic acid and silver nitrate powder, mix Stir constantly afterward, until silver nitrate and complexing agent are all dissolved, obtain B liquid, wherein isopropyl titanate: lithium acetylacetonate: propanol: deionized water: glacial acetic acid: silver nitrate (molar ratio)=1: 0.9: 15:60:1.9:0.0103; Mix liquid A and liquid B and continue to stir until the color-stable precursor sol is obtained, and then age the sol at room temperature for use; when uniforming the film, drop the solution onto the substrate. First run at 1000rpm for 5 seconds, then run at 2000rpm for 50 seconds. After each glue leveling, the film was thermally decomposed at 200°C for 300 seconds, after 15 times of glue leveling, the sample was placed in H 2 Annealing treatment was carr...

example 2

[0019] Weigh a certain amount of n-butyl titanate and lithium acetylacetonate, dissolve them in the organic solvent butanol, stir the mixture evenly to obtain liquid A; then weigh a certain amount of deionized water, glacial acetic acid and silver nitrate powder, mix After that, stir continuously until silver nitrate and complexing agent are all dissolved to obtain liquid B, wherein n-butyl titanate: lithium acetylacetonate: butanol: deionized water: polyvinylpyrrolidone (PVP): silver nitrate (molar ratio) = 1: 0.9: 30: 40: 1.9: 0.032; Mix liquid A and liquid B and continue to stir until the precursor sol with stable color is obtained, then age the sol at room temperature for use; onto the substrate. First run at 300rpm for 20 seconds, then at 3000rpm for 40 seconds. After each glue leveling, the film was thermally decomposed at 280°C for 200 seconds, and after 40 times of glue leveling, the sample was placed in H 2 Annealing treatment was carried out in the atmosphere for 6...

example 3

[0022] Weigh a certain amount of n-butyl titanate and lithium acetate, dissolve them in the organic solvent isopropanol, stir the mixture evenly to obtain liquid A; then weigh a certain amount of deionized water, glacial acetic acid and silver nitrate powder, mix Stir constantly afterward, until silver nitrate and complexing agent are all dissolved, obtain B liquid, wherein n-butyl titanate: lithium acetate: ethylene glycol methyl ether: deionized water: glacial acetic acid: silver nitrate (molar ratio)=1: 0.9∶60∶15∶1.9∶0.114; Mix liquid A and liquid B and continue to stir until the precursor sol with stable color is obtained, then age the sol at room temperature for use; when uniforming the film, drop the solution onto the substrate superior. First run at 500rpm for 15 seconds, then run at 5000rpm for 20 seconds. After each gluing, the film was thermally decomposed at 400°C for 60 seconds. After 30 times of gluing, the sample was placed in H 2 Annealing treatment was carrie...

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Abstract

The invention discloses a preparation method of an all solid-state film lithium ion battery negative electrode-a nano-silver particle dispersed Li4Ti5O12 negative electrode thin film, which belongs to the technical field of electrochemistry. The process is as follows: material preparation: dissolving compounds of titanium and the compounds of lithium in an organic solvent for obtaining solution A and mixing water, complexing agent and silver nitrate for obtaining solution B; preparation of precursor solution as follows: stirring and mixing the solution A and the solution B to a stable sol; and the preparation of the thin film: preparing a gel thin film on a substrate through the sol-gel method, carrying out preheating decomposition at 200-400 DEG C, annealing in an H2 atmosphere at 600-800 DEG C and further preparing the Ag / Li4Ti5O12 thin film. The thin film provided by the invention has the advantages of controllable stoichiometric composition, simple preparation method, process and equipment and easy preparation of the negative electrode thin film with large area. Compared with the traditional Li4Ti5O12 thin film negative electrode, the lithium ion battery negative electrode of the invention has high area specific capacity and excellent cycle performance in case of high multiplying power discharge.

Description

technical field [0001] The invention discloses a Ag / Li 4 Ti 5 o 12 The method for preparing a thin film, the prepared thin film can be used as a negative electrode material and applied to an all-solid thin film lithium ion battery, and belongs to the technical field of electrochemistry. Background technique [0002] Thin-film lithium battery is a kind of secondary battery with wide application prospects, which has the advantages of high discharge voltage, good charge and discharge performance, and high mass specific energy density. At present, research on thin-film lithium batteries has become a hot topic abroad, but there are not many researches on thin-film lithium batteries in China. In recent years, although some all-solid-state thin-film batteries have gradually appeared, their performance still needs to be further improved. The current research mainly focuses on the positive electrode film, and great progress has been made, but there are few research reports on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/62
CPCY02E60/12Y02E60/10
Inventor 胡晨卢祥军汪浩潘山存
Owner 大连德润达实业有限公司
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