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Nanoporous ultra-high molecular weight polyethylene membrane

An ultra-high molecular weight, nanoporous technology, applied in the field of nanoporous ultra-high molecular weight polyethylene film, can solve the problems of sacrificing battery performance and increasing manufacturing costs

Active Publication Date: 2019-07-09
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, multilayer stacking by stacking PE and PP together has been proposed in the art, however, this solution sacrifices battery performance and increases manufacturing cost due to thicker separator thickness and higher resistance

Method used

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  • Nanoporous ultra-high molecular weight polyethylene membrane
  • Nanoporous ultra-high molecular weight polyethylene membrane
  • Nanoporous ultra-high molecular weight polyethylene membrane

Examples

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Embodiment approach 1

[0074] Embodiment 1. A method of preparing a biaxially oriented nanoporous ultrahigh molecular weight polyethylene (UHMWPE) film, the method comprising:

[0075] Blend petrolatum, UHMWPE and antioxidants;

[0076] Agitate petrolatum, UHMWPE and antioxidant to form a suspension;

[0077] feeding the suspension into an extruder to produce gel filaments;

[0078] compressing the gel filaments to form a gel film;

[0079] Stretch the gel film to a preset size;

[0080] exposing the stretched gel film to an annealing temperature; and

[0081] Petrolatum was extracted from the stretched gel film.

Embodiment approach 2

[0082] Embodiment 2. The method of embodiment 1, wherein petrolatum, ultra high molecular weight polyethylene (UHMWPE) and antioxidant are stirred at a temperature of 120°C.

Embodiment approach 3

[0083] Embodiment 3. The method of any one of embodiments 1 to 2, wherein the petrolatum comprises petrolatum, white petrolatum, or a semi-solid mixture of hydrocarbons.

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Abstract

The application provides methods for producing a biaxially oriented nanoporous UHMWPE membrane. The method can include combining a petroleum jelly, an ultra-high-molecular- weight polyethylene (UHMWPE), and an antioxidant, forming a suspension, feeding the suspension into an extruder to produce a gel filament, pressing the gel filament to form a gel film, subjecting the gel film to an annealing temperature, and extracting the petroleum jelly from the gel film.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 423,764, filed November 17, 2016, and U.S. Provisional Patent Application Serial No. 62 / 529,334, filed July 6, 2017, each of which The entire contents of , including any figures, tables or drawings, are incorporated herein by reference. Background technique [0003] Lithium-ion batteries (LIBs) have many advantages and are crucial to address the energy shortage and environmental issues caused by the use of fossil fuels. However, LIBs still have hazards including fire and explosion. These problems can be caused by thermal runaway, where an increase in temperature triggers a further increase in temperature, mainly due to runaway exothermic reactions. Various types of safety devices, such as rupture valves, safety vents, hot-melt pressure-temperature coordination devices, and other circuit breakers are designed to enhance the reliabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14B01D67/00B01D69/02B01D71/26H01M50/403H01M50/406H01M50/417H01M50/489H01M50/491H01M50/494
CPCB01D67/0025B01D69/02B01D2325/04B01D2325/22B01D2325/24B82Y40/00H01M8/1018H01M8/0289H01M2300/0082B82Y30/00Y02E60/50Y02E60/10H01M50/44H01M50/403H01M50/417H01M50/406H01M50/491H01M50/489H01M50/494B01D2325/02832B01D2325/02833B01D2325/52B01D67/00113B01D71/261H01M10/0525H01M2300/004H01M4/131H01M50/414H01M4/134
Inventor 高平赵天寿李润莱曾林李津顾其傲
Owner THE HONG KONG UNIV OF SCI & TECH
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