Alumina particle-filled composite multi-arc hole membrane material and preparation method and application thereof

A membrane material, Al2O3 technology, used in hybrid capacitor separators, separators/films/diaphragms/spacers, electrical components, etc., can solve the problem of low battery charge retention, large surface pore size, high porosity rate and other issues, to achieve the effects of excellent mechanical properties, small surface pore size, and high heat resistance.

Active Publication Date: 2015-11-25
JIANGXI XIAN CAI NANOFIBERS TECH
View PDF8 Cites 10 Cited by
  • 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 ra

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]A composite membrane material containing aluminum oxide micro-nano particles, which uses electrospun polyimide (PI) nanofiber nonwovens as a substrate, and the pores of the substrate are filled with aluminum oxide micro-nano particles (Al 2 o 3 -NP);

[0035] Its preparation method is as follows:

[0036] (1) Nano Al 2 o 3 Water-based suspension (Al 2 o 3 / H 2 O-1) Configuration: 80.0 grams of alumina powder (mainly distributed in diameter of 80 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, and Emulsified at a speed of 10,000 revolutions per minute to form a nano-alumina water-based suspension (Al 2 o 3 / H 2 O-1).

[0037] (2)Al 2 o 3 / PI nanocomposite porous membrane preparation: Al 2 o 3 / H 2 The O-1 alumina water-based suspension was spread flat on a glass plate to form a suspension film with a thickness of 40 μm, and then the electrospu...

Embodiment 2

[0040] A composite membrane material containing aluminum oxide micro-nano particles, which uses electrospun polyimide (PI) nanofiber nonwovens as a substrate, and the pores of the substrate are filled with aluminum oxide micro-nano particles (Al 2 o 3 -NP);

[0041] Its preparation method is as follows:

[0042] (1) Submicron Al 2 o 3 Water-based suspension (Al 2 o 3 / H 2 O-2) Configuration: 80.0 grams of alumina powder (mainly distributed in diameter of 500 nm), 0.6 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, Emulsify under the rotating speed of 8000 revolutions per minute, form the submicron alumina water-based suspension (Al 2 o 3 / H 2 O-2).

[0043] (2)Al 2 o 3 Preparation of / PI micro-nano composite porous membrane: the above-configured Al 2 o 3 / H 2 The O-2 alumina water-based suspension was spread flat on a glass plate to form a suspension film w...

Embodiment 3

[0046] A composite membrane material containing aluminum oxide micro-nano particles, which uses electrospun polyimide (PI) nanofiber nonwovens as a substrate, and the pores of the substrate are filled with aluminum oxide micro-nano particles (Al 2 o 3 -NP);

[0047] Its preparation method is as follows:

[0048] (1) Micron Al 2 o 3 Water-based suspension (Al 2 o 3 / H 2 O-3) Configuration: 80.0 grams of alumina powder (mainly distributed in diameter of 800nm), 0.4 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, Emulsify at a speed of 8000 rpm to form a micron aluminum oxide water-based suspension (Al 2 o 3 / H 2 O-3).

[0049] (2)Al 2 o 3 Preparation of / PI micro-nano composite porous membrane: the above-configured Al 2 o 3 / H 2 The O-3 alumina water-based suspension was spread flat on a glass plate to form a suspension film with a thickness of 60 μm, and the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Surface average pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses an alumina particle-filled composite multi-arc hole membrane material. With polyimide (PI) nanofiber nonwoven fabric as a base material, holes of the base material are filled with micro-nano Al2O3 particles; the diameters of the micro-nano Al2O3 particles are 50-800nm; and the micro-nano Al2O3 particles account for 20%-50% of total weight of the composite multi-arc hole membrane material. According to the micro-nano composite multi-arc hole membrane material, the porosity is 30%-60%; the surface mean pore size is 50-800nm; and the thicknesses are 10-40 microns. The micro-nano composite multi-arc hole membrane material disclosed by the invention has high-temperature resistance, heat shrinkage resistance, high-voltage and high-current shock resistance and mechanical impact resistance, and is suitable for manufacturing various high-capacity and high-power lithium batteries or super-capacitors as a safety battery diaphragm and a safety super-capacitor diaphragm. The invention further provides a preparation method of the nano composite multi-arc hole membrane material, and an application of the nano composite multi-arc hole membrane material as the battery diaphragm.

Description

technical field [0001] The invention belongs to the field of battery separators, and relates to a porous membrane material, in particular to a composite multi-porous membrane material containing aluminum oxide micro-nano particles, 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M2/16H01G11/52H01M50/403H01M50/44H01M50/443H01M50/446
CPCH01G11/52H01M50/409Y02E60/13Y02E60/10
Inventor 侯豪情王琦周小平程楚云张和安
Owner JIANGXI XIAN CAI NANOFIBERS TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap