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Electrostatic spinning film, manufacturing method thereof, battery with electrostatic spinning film and object with electrostatic spinning film

A technology of electrospinning and electrospinning liquid, which is applied in the field of secondary batteries, can solve the problems of difficult to meet the requirements of battery separators and poor mechanical strength of electrospun nanofiber membranes, and achieve high porosity, good thermal stability, The effect of high puncture strength

Pending Publication Date: 2022-03-18
NINGDE ZHUOGAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength of electrospun nanofibrous membranes is poor, and it is difficult to meet the requirements of battery separators in roll packaging and battery assembly processes. Electrostatic spraying and other ways to improve

Method used

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  • Electrostatic spinning film, manufacturing method thereof, battery with electrostatic spinning film and object with electrostatic spinning film

Examples

Experimental program
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Effect test

preparation example Construction

[0035] Specifically, the above-mentioned static spinning preparation method comprises the following steps:

[0036] Preparation of inorganic nanoparticles: Add 0.3-5g of zirconium oxychloride solid powder and 5-80g of mineralizer powder to 10-1500ml of distilled water by hydrothermal method to prepare a zirconium hydroxide solution with a concentration of 0.001-0.1mol / L , stirred for 10-60min until uniform, transferred to a high-pressure reactor, kept at 150-200°C for 3-8h, centrifuged, washed and dried to obtain m-ZrO2 nanoparticles.

[0037] Preparation of electrospinning solution: dry the powdery polymer mixture and add it to the solvent N, N-dimethylformamide (DMF). After the dissolution is complete, add m-ZrO2 nanoparticles and stir with an electric stirrer for 1 -10h, make it fully dispersed to obtain an electrospinning solution.

[0038] Electrospinning: The spinning rate is 0.2-1.2ml / h, the setting voltage is 14-20KV, the ambient humidity is ≤30%, the distance between...

Embodiment 1

[0041] Add 3.2g of zirconium oxychloride solid powder and 60g of urea solid powder to 1000ml of distilled water to prepare a 0.01mol / L zirconium hydroxide solution, stir for 30min until uniform, transfer to an autoclave, keep at 170°C for 6h, and wash by centrifugation Dry to obtain m-ZrO2 nanoparticles.

[0042] Dissolve 30g of PVDF and 70g of PAN in 550g of DMF. After the dissolution is complete, add 0.4g of m-ZrO2 nanoparticles and stir with an electric stirrer for 2.5h to fully disperse them to obtain an electrospinning solution.

[0043] Spinning solution is injected in the 60ml syringe, and adopting spinning rate is 1.2ml / h, and setting voltage is 20KV, ambient humidity (RH)≤30%, and spinning nozzle is 20cm to receiving plate spacing, collects through drum, at 70 After drying at ℃ for 2.5 hours, the electrospun film can be obtained.

Embodiment 2

[0045] The difference between this example and Example 1 is that 10g of PVDF and 90g of PAN are dissolved in 550g of DMF.

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Abstract

The invention discloses an electrostatic spinning film, and relates to the technical field of secondary batteries. The electrostatic spinning film is prepared by performing electrostatic spinning on an electrostatic spinning solution, wherein the electrostatic spinning solution comprises a polymer mixture; and the addition amount of the inorganic nanoparticles is 0.01-1 wt% of the polymer mixture. According to the preparation method, electrostatic spinning is carried out in a mixing and dissolving mode, the polymer and the nano inorganic material are combined, and the prepared film has the advantages of oxidation resistance, high puncture strength, high wettability, high porosity, good thermal stability, simplicity in operation and no powder falling phenomenon.

Description

technical field [0001] The present application relates to the technical field of secondary batteries, in particular to an electrospun film and its manufacturing method, as well as batteries and objects having the same. Background technique [0002] The separator is an important part of the lithium-ion battery. On the one hand, it prevents the direct contact between the positive and negative electrodes to cause a short circuit, and on the other hand, it allows lithium ions to move between the positive and negative electrodes to achieve the purpose of charging and discharging. With the development of wireless electronic products and hybrid electric vehicles, lithium-ion battery separators with good safety performance, high cycle performance and long service life have been extensively studied. Currently, conventional microporous polyolefin separators are the most widely used in Li-ion batteries. This kind of microporous separator has good chemical stability, suitable thickness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4318D04H1/43D04H1/4382D01F1/10H01M50/411H01M50/431H01M50/44H01M50/443H01M50/403H01M10/0525
CPCD04H1/728D04H1/4318D04H1/43D04H1/43835D01F1/10H01M50/411H01M50/431H01M50/44H01M50/443H01M50/403H01M10/0525Y02E60/10
Inventor 李姗姗王晓明杨浩田周素霞黄云王婷邹奇
Owner NINGDE ZHUOGAO NEW MATERIAL TECH CO LTD