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An oily coating and nano-ceramic fiber composite diaphragm and a preparation method thereof

A technology of nano-ceramic fiber and composite diaphragm, which is applied in the field of preparation of oil-based coating and nano-ceramic fiber composite diaphragm, and oil-based coating and nano-ceramic fiber composite diaphragm. Separator shrinkage and other issues, to achieve the effects of convenient processing and transportation, improved mechanical properties and thermal stability, and strong batteries

Inactive Publication Date: 2019-01-11
JIANGSU QINGTAO ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat-shrinkage resistance of the simple glue-coated separator is not good. When the battery is working under high temperature conditions, it is easy to cause the diaphragm to shrink, which seriously endangers the safety performance of the battery. Therefore, it is very necessary to develop a glue-coated separator with excellent heat-shrinkage resistance.

Method used

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  • An oily coating and nano-ceramic fiber composite diaphragm and a preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] An oily coating and nano-ceramic fiber composite membrane of the present invention, the composite membrane is composed of the following components: the polymer material is polyvinylidene fluoride, the nano-ceramic fiber is attapulgite fiber powder, and the binder is Polyacrylate, dispersant are polyethylene glycol and sodium carboxymethyl cellulose, pore forming agent is hydroxyethyl cellulose and organic solvent is N-methylpyrrolidone and dimethyl sulfoxide, wherein the mass of each component Ratio: 10 for attapulgite fiber powder, 0.2 for polyethylene glycol, 80 for N-methylpyrrolidone, 8 for polyvinylidene fluoride, 0.5 for hydroxyethyl cellulose, and 0.4 for sodium carboxymethyl cellulose , 3 for polyacrylate and 10 for dimethyl sulfoxide.

[0026] The nano-ceramic fiber has an average length of 0.5 μm-2 μm, preferably 1 μm, and an average diameter of 0.05 μm-0.3 μm, preferably 0.1 μm.

[0027] A preparation method of an oily coating and a nano-ceramic fiber compos...

Embodiment 2

[0035] An oily coating and nano-ceramic fiber composite diaphragm of the present invention, the composite diaphragm is composed of the following components: the polymer material is polyvinylidene fluoride, the binder is polyacrylate, and the dispersant is carboxymethyl fiber Sodium plain, pore forming agent is hydroxyethyl cellulose and organic solvent is N-methylpyrrolidone and dimethyl sulfoxide, wherein, the mass ratio of each component is: polyvinylidene fluoride is 8, hydroxyethyl cellulose 0.5, 0.4 for sodium carboxymethylcellulose, 3 for polyacrylate, 10 for dimethyl sulfoxide, and 80 for N-methylpyrrolidone.

[0036] A preparation method of an oily coating and a nano-ceramic fiber composite diaphragm, the preparation method of the composite diaphragm comprises the following steps:

[0037] Step 1: Disperse polyvinylidene fluoride in a mixed solvent of N-methylpyrrolidone and dimethyl sulfoxide, and fully stir for 1-3 hours at a stirring speed of 1000-3000 rpm. The pref...

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Abstract

The invention discloses an oil coating and nano ceramic fiber composite diaphragm, which is composed of macromolecule polymer material, nano ceramic fiber, binder, dispersant, pore-forming agent and organic solvent, wherein the mass ratio of each component is: macromolecule polymer material 1-20, nano ceramic fiber 2-40, bind 1.5-8, dispersant 0.05-1.5, pore-forming agent 0.05-5 and organic solvent 60-95. As that nano ceramic fiber is uniformly dispersed and stacked in the composite membrane, the in-plane tensile strength of the membrane is improved, the mechanical performance and the thermalstability of the membrane are improved, and the safety of the battery is enhanced.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an oily coating and nano ceramic fiber composite diaphragm, and also relates to a preparation method of the oily coating and nano ceramic fiber composite diaphragm. Background technique [0002] Due to its high energy density and long cycle life, lithium-ion batteries are becoming a research hotspot in new power supply technologies. Lithium-ion batteries have been widely used in many fields such as digital electronic products and new energy vehicles, and are internationally recognized as a new energy carrier with great application prospects and market value. In recent years, my country is vigorously developing the lithium-ion battery industry, and the production capacity of lithium-ion batteries continues to increase, but the safety issues of lithium-ion batteries that follow have also attracted more and more attention. [0003] The composition of a lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14C09D127/16C09D7/61C09D7/65H01M50/40H01M50/411H01M50/417H01M50/434H01M50/44
CPCC09D7/65C09D7/70C09D127/16C09D7/61C08L2205/035H01M50/431H01M50/44H01M50/403H01M50/449C08L33/04C08K7/10Y02E60/10
Inventor 李峥冯玉川陈雷席健杨帆南策文
Owner JIANGSU QINGTAO ENERGY TECH
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