Preparation method of lithium lanthanum zirconium oxide nanometer fiber, preparation method of composite film and solid battery application

A lithium-lanthanum-zirconium-oxygen nanofiber and lithium-lanthanum-zirconium-oxygen fiber technology, applied in the application of solid-state lithium batteries, lithium-lanthanum-zirconium-oxygen nanofibers, the field of composite film preparation, can solve easy clogging, loss of battery capacity and cycle life, etc. problems, to avoid clogging, improve high temperature performance and safety, and easy operation

Inactive Publication Date: 2017-11-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, spherical ceramic particles are easy to block the pores in the polyolefin separator, thereby blocking the conduction channel of lithium ions, resulting in a significant loss of battery capacity and cycle life.

Method used

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  • Preparation method of lithium lanthanum zirconium oxide nanometer fiber, preparation method of composite film and solid battery application
  • Preparation method of lithium lanthanum zirconium oxide nanometer fiber, preparation method of composite film and solid battery application
  • Preparation method of lithium lanthanum zirconium oxide nanometer fiber, preparation method of composite film and solid battery application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Lithium Lanthanum Zirconium Oxygen Nanofiber-Polyethylene Oxide Composite Film Applied to Solid State Batteries

[0042] (1) Dissolve 1.323g of lithium nitrate, 3.89g of lanthanum nitrate, and 1.38g of zirconyl nitrate in a mixed solution of 25mL of deionized water, 5mL of acetic acid, and 15mL of isopropanol, and stir at room temperature for 5 hours to obtain a solution containing 0.03mol Li 7 La 3 Zr 2 o 12 6mL of the precursor sol solution was taken for later use; polyvinylpyrrolidone (PVP) was dissolved in 4ml of acetic acid, and stirred to obtain a uniform mixed solution, wherein the mass percentage of PVP in acetic acid was 10%. The two solutions are fully mixed to obtain 10ml of spinning solution;

[0043] (2) Transfer the spinning precursor solution to a 10mL syringe, install it in the air-jet spinning device, and the airflow pressure is 4000kPa, and a uniform white fiber film can be collected quickly and efficiently on the iron wire receiving plat...

Embodiment 2

[0051] Example 2: Lithium Lanthanum Zirconium Oxygen Nanofiber-Polyethylene Carbonate Composite Film Applied to Solid State Batteries

[0052] (1) Dissolve 1.323g of lithium nitrate, 3.89g of lanthanum nitrate, and 1.38g of zirconyl nitrate in a mixed solution of 25mL of deionized water, 5mL of acetic acid, and 15mL of isopropanol, and stir at room temperature for 5 hours to obtain a solution containing 0.03mol Li 7 La 3 Zr 2 o 12 6mL of the precursor sol solution was taken for later use; polyvinylpyrrolidone (PVP) was dissolved in 4ml of acetic acid, and stirred to obtain a uniform mixed solution, wherein the mass percentage of PVP in acetic acid was 10%. The two solutions are fully mixed to obtain 10ml of spinning solution;

[0053] (2) Transfer the spinning precursor solution to a 10mL syringe, install it in the air-jet spinning device, and the airflow pressure is 4000kPa, and a uniform white fiber film can be collected quickly and efficiently on the iron wire receiving ...

Embodiment 3

[0061] Example 3: Al-doped lithium lanthanum zirconium oxide nanofiber-polypropylene carbonate composite film applied to solid-state batteries

[0062] (1) 1.323g of lithium nitrate, 3.89g of lanthanum nitrate, 1.38g of zirconium oxynitrate and 0.22g of aluminum nitrate were dissolved in a mixed solution of 25mL of deionized water, 5mL of acetic acid, and 15mL of isopropanol, and stirred at room temperature for 5 hours, Obtained containing 0.03molLi 6.4 La 3 Zr 2 Al 0.2 o 12 6mL of the precursor sol solution was taken for later use; polyvinylpyrrolidone (PVP) was dissolved in 4ml of acetic acid, and stirred to obtain a uniform mixed solution, wherein the mass percentage of PVP in acetic acid was 10%. The two solutions are fully mixed to obtain 10ml of spinning solution;

[0063] (2) Transfer the spinning precursor solution to a 10mL syringe, install it in the air-jet spinning device, and the airflow pressure is 4000kPa, and a uniform white fiber film can be collected quic...

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Abstract

The invention discloses a preparation method of a lithium lanthanum zirconium oxide nanometer fiber, a preparation method of a composite film and solid battery application. Filamentation is carried out on a lithium lanthanum zirconium oxide precursor solution by using a jet airflow and a propelling plant, and the lithium lanthanum zirconium oxide nanometer fiber is obtained after heat treatment is carried out on the collected lithium lanthanum zirconium oxide fiber precursor. Superfine lithium lanthanum zirconium oxide nanometer powder or a lithium lanthanum zirconium oxide nanometer fiber film with certain mechanical property is obtained respectively by regulating the technological parameters and heat treatment temperature of an airflow spinning process. The method is simple in operation and low in cost, and can realize commercialized production. The composite film of the lithium lanthanum zirconium oxide fiber film and polymer provides a continuous lithium ion passage, so that higher ionic conductivity can be provided. The lithium lanthanum zirconium oxide nanometer fiber powder is used for composite ceramic films or composite electrolytes, blockage for membrane holes can be avoided, and higher ionic conductivity can be provided. A solid battery or lithium-ion battery prepared by using the lanthanum zirconium oxide nanometer fiber film or powder is stable in cycle performance, high in rate capability, low in interface impedance and high in stability.

Description

Technical field [0001] The invention belongs to the field of lithium-ion batteries, and specifically relates to a preparation method of lithium-lanthanum-zirconium-oxygen nanofibers and composite films, and their application in solid-state lithium batteries. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life, and no memory performance. As commercial energy storage devices, they are widely used in daily life and production. With the advancement of science and technology, people's demand for efficient energy storage equipment has gradually increased, and safety issues have become the main challenge faced by lithium-ion batteries in new demands and applications in new fields. The safety issues of lithium-ion batteries mainly stem from the large amount of flammable organic solvents in the liquid electrolyte. All-solid-state lithium-ion batteries use solid electrolytes instead of commercial liquid organic electrolytes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16B82Y30/00H01M10/0525H01M50/403H01M50/44H01M50/497
CPCH01M10/0525B82Y30/00H01M50/431H01M50/44H01M50/403Y02E60/10
Inventor 范丽珍李丹张博晨
Owner UNIV OF SCI & TECH BEIJING
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