Unlock instant, AI-driven research and patent intelligence for your innovation.

Ceramic separator with high inorganic solid content and its application in lithium-ion battery system

A technology of ceramic diaphragm and solid phase content, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as potential safety hazards, and achieve the effects of strong puncture resistance, not easy to break, and good process controllability

Inactive Publication Date: 2017-01-25
JIANGSU QINGTAO ENERGY TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, BYD Co., Ltd. disclosed in CN100505407C that the company selected the yttrium-stabilized zirconia ceramic tow braided membrane produced by Guangzhou Xinlaifu Magnetoelectric Co., Ltd. as a lithium-ion battery separator, but the pores of the separator material are between 20 and 200 microns. Between, the pore size far exceeds the grain size of the positive and negative materials of the battery. Although the separator can play a protective role in high temperature environments, it has certain safety hazards when it is used for a long time and multiple cycles.

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
  • Ceramic separator with high inorganic solid content and its application in lithium-ion battery system
  • Ceramic separator with high inorganic solid content and its application in lithium-ion battery system
  • Ceramic separator with high inorganic solid content and its application in lithium-ion battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Aluminum oxide fiber membrane S1

[0029] Dissolve 2.0g of aluminum nitrate in 20g of deionized water, then add 20g of polyvinyl alcohol solution with a mass concentration of 10%, and stir thoroughly to obtain a precursor solution; add the precursor solution into the syringe of the electrospinning equipment, and spin The method is to obtain precursor fibers (spinning conditions: spinning voltage 30KV, extrusion speed 2.0ml / min); repeat the above process several times to obtain multiple precursor fibers; remove all the fibers from the receiving plate, and place them in a medium temperature furnace Calcined at 1000° C. for 10 hours, collected 50.5 g of aluminum oxide fiber powder in total; the average length of the obtained aluminum oxide fibers was 0.5 μm, and the average diameter was 0.05 μm. Soak the aluminum oxide fiber powder in a silane coupling agent solution, filter, and dry to carry out surface lipophilic modification treatment; weigh 25.0 g of the pre...

Embodiment 2

[0030] Example 2: Zirconia fiber membrane S2

[0031] Dissolve 2.0g of zirconium oxynitrate in 20g of deionized water, then add 20g of 10% polyvinyl alcohol solution in mass concentration, and stir thoroughly to obtain a precursor solution; add the precursor solution into the syringe of the electrospinning equipment, and spin method, to obtain precursor composite fibers (spinning conditions: spinning voltage 30KV, extrusion speed 2.0ml / min); repeat the above process several times to obtain multiple precursor composite fibers; remove all composite fibers from the receiving plate, and Calcined in a medium-temperature furnace at 1000° C. for 10 hours, collected 38.76 g of zirconium dioxide fiber powder; the average length of the obtained zirconium dioxide fibers was 1.5 microns, and the average diameter was 0.3 microns. Soak the fiber powder in a silane coupling agent solution, filter, and dry to carry out surface lipophilic modification treatment; weigh 25.0 g of the pretreated ...

Embodiment 3

[0032] Example 3: Attapulgite clay fiber separator S3

[0033] The attapulgite clay is selected from the Xuyi area of ​​Jiangsu Province. It is fibrous in shape, with an average length of 1 micron and an average diameter of 0.05 micron. Filtration, drying, and surface lipophilic modification treatment; the main component of attapulgite clay rods is silicon dioxide, weigh 60g of pretreated composite fiber powder, 14g of polyvinylidene fluoride, and 1g of polyethylene glycol, and dissolve them in 75g In ethanol, the slurry is formed after sufficient stirring; the slurry is subjected to vacuum defoaming treatment, and the defoaming slurry is continuously and automatically cast into a film by a tape casting machine and dried to obtain an attapulgite clay with a thickness of 100 microns Fibrous septum.

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
lengthaaaaaaaaaa
diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a ceramic diaphragm with high inorganic solid phase content and its application in a lithium-ion battery system. The ceramic diaphragm is a porous membrane composed of composite materials, including inorganic nanofibers and binders, wherein the inorganic nanofibers The solid phase content exceeds 45%; the invention solves the problem of heat resistance of the separator, increases the local heat resistance temperature to above 300°C, and at the same time, the thermal shrinkage rate is greatly reduced, and the puncture resistance performance is greatly improved. It is suitable for lithium-ion power batteries and has a large Improve battery safety.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery separators, and in particular relates to a ceramic separator with high inorganic solid content and the application of the separator in a lithium-ion battery system. Background technique [0002] Lithium-ion secondary batteries have the characteristics of high energy density, long storage time, and many cycles, and have been widely used in the field of portable electronic device power supplies. In recent years, with the continuous development of battery technology, lithium-ion secondary batteries have also been applied in large and medium-sized electric equipment such as new energy vehicles, electric bicycles, and various electric tools, and have shown good development prospects. [0003] In the application field of large and medium-sized electric equipment, the battery operating voltage and current requirements are relatively high, which usually makes the battery work in a relatively harsh envir...

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 Patents(China)
IPC IPC(8): H01M2/16H01M50/434H01M50/44
CPCH01M50/431H01M50/44H01M50/403Y02E60/10
Inventor 李峥冯玉川杨帆沈洋南策文
Owner JIANGSU QINGTAO ENERGY TECH