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Nanometer chitosan composite diaphragm of lithium battery and manufacturing method of nanometer chitosan composite diaphragm

A nano-chitosan, battery separator technology, applied in battery pack parts, separators/films/diaphragms/spacers, circuits, etc., can solve problems such as loss of blocking effect, high heat and combustion, electrode short circuit, etc. Achieve the effect of preventing the flow of electrons, excellent insulation, and high electromotive force

Inactive Publication Date: 2015-09-30
SICHUAN XIDANFO LITHIUM BATTERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] ② After this type of membrane material is heated, it has the memory effect of restoring the original shape of the material, and produces a large shrinkage loss effect / causing the loss of the blocking effect (function) of the diaphragm material on the positive / negative electrode / electrode short circuit / production of high heat and Burn, explode!

Method used

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  • Nanometer chitosan composite diaphragm of lithium battery and manufacturing method of nanometer chitosan composite diaphragm
  • Nanometer chitosan composite diaphragm of lithium battery and manufacturing method of nanometer chitosan composite diaphragm

Examples

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Effect test

preparation example Construction

[0026] The nano-chitosan composite lithium battery diaphragm provided by the invention is prepared by the following method:

[0027] 1. The calculated amount of polyethylene oxide and the calculated amount of deionized water are forced to disperse in a strong dispersion tank at room temperature for 30 minutes to make a polyethylene oxide aqueous solution as material A and set aside.

[0028] 2. Use the calculated amount of the following Chinese invention patent (patent number: ZL 02113792.6) claim 4, the B material (micron chitosan sol) synthesized in the second step and the Chinese invention patent (patent number: ZL200410081608.8) The mixture prepared by the synthesized end product (nano-chitosan sol) is B material and is set aside.

[0029] 3. Put the calculated amount of material B in the reactor, and under the condition of forced dispersion at room temperature and 500 rpm, add material A directly into the reactor of material B. After adding material A, keep it under the s...

Embodiment 1

[0037] 1. 1.5 grams of polyethylene oxide resin and 100 grams of deionized water were forced to disperse in a strong dispersion tank at room temperature for 30 minutes to make a polyethylene oxide aqueous solution as material A and set aside.

[0038] 2. With 120 grams of the following Chinese invention patent (patent number: ZL 02113792.6) claim 4, the B material (micron chitosan sol) synthesized in the second step and 80 grams of Chinese invention patent (patent number: ZL 200410081608.8 ) The mixture prepared by the synthesized terminal product (nano-chitosan sol) is B material, for subsequent use.

[0039] 3. Put 200 grams of material B in the reactor, under the condition of forced dispersion at room temperature and 500 rpm, add 10 grams of material A directly into the reactor of material B, after adding material A, under the same conditions Keep it for another 20 minutes, it is C material.

[0040] 4. With 205 grams of C material at room temperature and 500 r / min forced ...

Embodiment 2

[0043] 1. Forcefully disperse 2.5 grams of polyethylene oxide resin and 100 grams of deionized water in a strong dispersion tank at room temperature for 30 minutes to prepare a polyethylene oxide aqueous solution as material A, and set aside.

[0044] 2. Utilize 100 grams of the following Chinese invention patent (patent number: ZL02113792.6) claim 4, the B material (micron chitosan sol) synthesized in the second step and 100 grams of Chinese invention patent (patent number: ZL200410081608 .8) The mixture prepared by the synthesized terminal product (nano-chitosan sol) is B material and is set aside.

[0045]3. Put 215 grams of material B in the reactor, and add 30 grams of material A directly into the reactor of material B at room temperature and under the condition of forced dispersion at 500 rpm. Keep it for another 20 minutes, it is C material.

[0046] 4. With 245 grams of C material at room temperature and 500 rpm under forced dispersion conditions, gradually add 15 gra...

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Abstract

The invention belongs to the field of manufacturing of lithium batteries, and relates to a nanometer chitosan composite diaphragm of a lithium battery and a manufacturing method of the nanometer chitosan composite diaphragm. An ionic polymer membrane material composed of a (nanometer chitosan sol particles and micrometer chitosan sol particles) network and olefin copolymerized latex / polyethylene oxide is provided. According to the ionic polymer membrane material, the (nanometer chitosan sol particles and micrometer chitosan sol particles) network is adopted as a support body, and the nanometer chitosan composite diaphragm is formed through curtain coating and drying. The diaphragm has excellent three-dimensional network conformation, the porosity is 80% or more, and the thickness of the diaphragm is 5-60 micrometers. The diaphragm has no stress effect or form memory effect, has good chemical stability, form dimensional stability, thermal stability, insulativity and excellent physical mechanical strength (including tension resistance, impact resistance and flexibility in bending and the like), and has good adsorption affinity with an electrolyte. The nanometer chitosan composite diaphragm has positive charge characteristics, and can provide a free channel for positive electric lithium ions.

Description

technical field [0001] The invention belongs to the technical field of lithium battery manufacturing, and relates to a nano-chitosan composite lithium battery diaphragm and a manufacturing method thereof. Background technique [0002] The diaphragm is one of the important components of the lithium battery, and its microporous structure, physical properties, chemical properties, thermal properties, etc. are closely related to the performance of the lithium battery. Lithium batteries have a high working voltage, lithium battery diaphragm materials and highly electrochemically active positive and negative electrode materials should have excellent compatibility; and as battery diaphragm materials, they should also have excellent stability, solvent resistance, and ion conductivity. Sex, electrical insulation, heat resistance and good physical and mechanical properties (tensile, impact, flexible, etc.). [0003] Today, PP / PE materials, which are the leading materials for lithium ...

Claims

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Application Information

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IPC IPC(8): H01M2/16C08J9/28H01M50/446
CPCC08J5/2212C08J2367/02C08J2405/08C08J7/0427H01M50/409Y02E60/10
Inventor 郭小平孙清彬龚正烈龚葆红
Owner SICHUAN XIDANFO LITHIUM BATTERY
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