Preparation method for inorganic / organic multilayer composite separator

A multi-layer composite and diaphragm technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problems of large functional limitation of diaphragm, high price, uneven powder dispersion, etc. The effect of improving liquid performance, improving cost performance, and improving heat resistance

Inactive Publication Date: 2013-04-24
GUANGDONG UNIV OF TECH
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers consider using the method of ion sputtering to prepare multilayer composite films, such as patent CN 102427119A, CN 102709592A mentioned that the method of ion sputtering is used to plate an inorganic layer on the surface of the diaphragm, which can improve heat resistance and effectively control the thickness , but the coating is limited by the target material, especially the high-purity target material of nitride and oxide is expensive, difficult to prepare, and has great restrictions on the functionalization of the diaphragm, so it is difficult to popularize and use
[0005] At present, the thickness of the widely used coating method is difficult to control, and there are problems of uneven powder dispersion, agglomeration, and agglomeration in the slurry. At the same time, the storage of the slurry Poor stability, after standing for a period of time, there will be obvious precipitation and difficulty in secondary dispersion
Although the newly proposed ion sputtering method can effectively control the thickness, it is limited by the target material, especially the difficulty in the preparation of special targets, which hinders the preparation of high-performance diaphragms with controllable thickness.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for inorganic / organic multilayer composite separator
  • Preparation method for inorganic / organic multilayer composite separator
  • Preparation method for inorganic / organic multilayer composite separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Soak the polyethylene diaphragm in n-hexane, ultrasonically oscillate for 15 minutes, then dry it in an oven at 80°C, cut the cleaned diaphragm into a square diaphragm of 45cm×50cm, and put it into the coating chamber of the radio frequency sputtering equipment , select the nickel target as the target material, first pump the coating chamber to 0.1Pa, then fill it with high-purity nitrogen, select the sputtering power as 5W, and the sputtering time as 5min, stop the equipment, take out the diaphragm, turn over and repeat the upper process , that is, a double-sided composite nickel nitride multilayer diaphragm is prepared. The result is better.

Embodiment 2

[0035] Soak the polypropylene diaphragm in acetone, ultrasonically oscillate for 15 minutes, and dry it in an oven at 80°C. Cut the cleaned diaphragm into a square diaphragm of 50cm×50cm, and put it into the coating chamber of the radio frequency sputtering equipment. Choose an aluminum target as the target material, pump the coating chamber to 1Pa first, and then fill it with high-purity oxygen. The sputtering power is 80W, and the sputtering time is 100min. After stopping the equipment, take out the diaphragm, turn it over and repeat the upper process. A double-sided composite alumina multilayer separator was obtained. The result is better.

Embodiment 3

[0037] Soak the polypropylene / polyethylene / polypropylene multilayer composite diaphragm in methanol, ultrasonically oscillate for 20 minutes, then dry it in an oven at 80°C, cut the cleaned diaphragm into a square diaphragm of 70cm×40cm, put it in In the coating chamber of the radio frequency sputtering equipment, cobalt target is selected as the target material. First, the pressure of the coating chamber is pumped to 0.4Pa, and then filled with high-purity oxygen. The sputtering power is selected as 40W, and the sputtering time is 70min. After stopping the equipment, Take out the diaphragm, turn it over and repeat the upper process to obtain a double-sided composite cobalt oxide multilayer diaphragm. The result is better.

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
thermal resistanceaaaaaaaaaa
thicknessaaaaaaaaaa
shrinkageaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for an inorganic / organic multilayer composite separator. The method comprises: soaking a separator in an organic solvent, cleaning surface of the separator by using ultrasonic vibration for 15 ~ 30min, drying in an oven, and then cutting the separator into a square separator; placing the above square separator and a target material into a RF (radio frequency) sputtering device; adjusting the air pressure of the RF sputtering device to be 0.1 ~ 1.0Pa, and then feeding in reactant gas, the sputtering power being 5 ~ 80W and the sputtering time being 5 ~ 100min; running the device, so target material plasma bombards gas molecules to form inorganic matter / organic matter which deposit on both sides of the separator to obtain an inorganic / organic multilayer composite separator. By uniformly sputtering one layer or a plurality of layers of inorganic matter / organic matter on the porous separator surface, the dimensional stability of ordinary separators is effectively improved, and the heat resistance of the separator is improved.

Description

technical field [0001] The invention belongs to the technical field of high-performance diaphragm preparation, and in particular relates to a preparation method of an inorganic / organic multilayer composite diaphragm. Background technique [0002] As an important part of lithium-ion batteries, separators have attracted extensive attention from researchers. The high performance of lithium-ion batteries is closely related to the properties of separators. Especially in lithium batteries with high rate and fast charge and discharge, the performance requirements of separators are more obvious. In view of the fact that the separator has a crucial impact on the performance of the actual battery, it must have good chemical and electrochemical stability and maintain a high degree of wettability to the electrolyte during repeated charge and discharge. The interface between the separator material and the electrode The compatibility and the retention of the electrolyte by the separator h...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16C23C14/20C23C14/34
CPCY02E60/12Y02E60/10
Inventor 徐睿杰雷彩红莫康信胡冰石文强蔡启张海燕
Owner GUANGDONG UNIV OF 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