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Zirconium oxide particles filled composite multi-curved-porous membrane material, and preparation method and application therefor

A membrane material and curved hole technology, applied in electrical components, circuits, battery pack components, etc., can solve the problems of low battery charge retention rate, large surface pore size, high porosity, etc., and achieve excellent mechanical properties, surface pore size, etc. Small, high heat resistance effect

Active Publication Date: 2016-01-06
JIANGXI XIAN CAI NANOFIBERS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this electrospun nanofiber separator is a non-woven fabric stacked by fibers, it has too high porosity and too large surface pore size, resulting in a low charge retention rate of the battery and frequent micro-short circuits. Especially when the thickness of the battery separator is low, such as below 30 microns, the probability of this situation is quite high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A containing ZrO 2 A composite membrane material of nanoparticles, which uses electrospun polyimide (PI) nanofiber nonwovens as the substrate, and the pores of the substrate are filled with ZrO 2 Nanoparticles (ZrO 2 -NP);

[0036] Its preparation method is as follows:

[0037] (1) Nano-ZrO 2 Water-based suspension (ZrO 2 / H 2 O-1) configuration: 80.0 grams of nano-zirconia powder (mainly distributed in diameter of 30nm), 1.0 grams of ammonium polyacrylate, 8.0 grams of butyl acrylate-isooctyl acrylate copolymer, 300.0 grams of distilled water, put into a beaker at one time In the process, emulsify at a speed of 8000 revolutions per minute to form a water-based suspension of nano-zirconia with an absolute viscosity of 24mPa·S (ZrO 2 / H 2 O-1).

[0038] (2) ZrO 2 / PI nanocomposite porous membrane preparation: ZrO configured above 2 / H 2 The O-1 zirconia water-based suspension was spread on a glass plate to form a suspension film with a thickness of 20 μm, and ...

Embodiment 2

[0041] A containing ZrO 2 A composite membrane material of nanoparticles, which uses electrospun polyimide (PI) nanofiber nonwovens as the substrate, and the pores of the substrate are filled with ZrO 2 Nanoparticles (ZrO 2 -NP);

[0042] Its preparation method is as follows:

[0043] (1) Nano-ZrO 2 Water-based suspension (ZrO 2 / H 2 O-2) configuration: 80.0 grams of zirconium dioxide powder (mainly distributed in diameter of 100 nm), 0.6 grams of ammonium polyacrylate, 8.0 grams of butyl acrylate-isooctyl acrylate copolymer, 433.0 grams of distilled water, put them in a beaker at one time , emulsified at a speed of 8000 rpm to form a water-based suspension of nano-zirconia (ZrO2) with an absolute viscosity of 17mPa·S 2 / H 2 O-2).

[0044] (2) ZrO 2 Preparation of / PI nanocomposite high temperature and high safety battery separator: ZrO configured above 2 / H 2 The O-2 zirconia water-based suspension was spread on a glass plate to form a suspension film with a thickn...

Embodiment 3

[0047] A containing ZrO 2 A composite membrane material of nanoparticles, which uses electrospun polyimide (PI) nanofiber nonwovens as the substrate, and the pores of the substrate are filled with ZrO 2 Nanoparticles (ZrO 2 -NP);

[0048] Its preparation method is as follows:

[0049] (1) Nano-ZrO 2 Water-based suspension (ZrO 2 / H 2 O-3) configuration: 80.0 grams of zirconium dioxide powder (mainly distributed in diameter of 50 nm), 0.8 grams of ammonium polyacrylate, 8.0 grams of butyl acrylate-isooctyl acrylate copolymer, 300.0 grams of distilled water, put them in a beaker at one time , emulsified at a speed of 8000 rpm to form a micron zirconia water-based suspension (ZrO2) with an absolute viscosity of 25mPa·S 2 / H 2 O-3).

[0050] (2) ZrO 2 / PI nanocomposite porous membrane preparation: ZrO configured above 2 / H 2 The O-3 zirconia water-based suspension was spread on a glass plate to form a suspension film with a thickness of 45 μm, and then the electrospun P...

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Abstract

The invention discloses a nanocomposite multi-curved-porous membrane material. The nanocomposite multi-curved-porous membrane material takes polyimide (PI) nanofiber non-woven fabric as a base material, and nanometer zirconium dioxide (ZrO2) particles are filled in pores of the base material; the diameter of the nanometer ZrO2 particles is 50-100 nm, and the weight of the nanometer ZrO2 particles is 30-50% of the total weight of the nanocomposite multi-curved-porous membrane material; the thickness of the PI nanofiber non-woven fabric is 9-38 um, and the porosity is 60-80%. The nanocomposite multi-curved-porous membrane material has high-temperature resistance, thermal shrinkage resistance, high voltage and high current impact resistance, and mechanical collision resistance, so that the nanocomposite multi-curved-porous membrane material is suitable for being used as safety battery membranes and safety supercapacitor members for manufacturing various high-capacity and high-power lithium batteries or supercapacitors. The invention further provides a preparation method for the nanocomposite multi-curved-porous membrane material, and an application of the nanocomposite multi-curved-porous membrane material in being used as the battery membranes.

Description

technical field [0001] The invention belongs to the field of battery separators and relates to a porous membrane material, in particular to a ZrO-containing 2 A composite porous membrane material of nanoparticles, a preparation method thereof, and an application as a battery separator. Background technique [0002] As the power battery of new energy vehicles, lithium-ion batteries have been developed rapidly and will become an indispensable daily necessities for human beings. However, since the currently used lithium battery separator is a polyolefin porous membrane material with poor temperature resistance, at a higher temperature, or in the case of overcharging, overdischarging and mechanical damage, lithium-ion batteries are prone to smoke, Fire, even explosion and other hidden dangers that endanger the safety of users. Therefore, improving the safety of lithium-ion batteries is the key to promoting the application of lithium-ion batteries in automotive power and other ...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/443H01M50/454H01M50/491H01M50/494H01M50/497
CPCH01M50/403H01M50/411H01M50/44H01M50/431Y02E60/10
Inventor 侯豪情王琦周小平程楚云侯翔宇
Owner JIANGXI XIAN CAI NANOFIBERS TECH
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