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Nano chitosan composite lithium battery diaphragm and manufacturing method thereof

A technology of nano-chitosan and battery diaphragm, applied in the direction of lithium batteries, battery components, non-aqueous electrolyte batteries, etc., can solve the problems of poor thermal stability and low porosity of leading materials, and achieve excellent physical and mechanical strength performance, The effect of excellent chemical stability and excellent insulation

Pending Publication Date: 2019-06-21
王在福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Based on the above prior art, the object of the present invention is to provide a nano-chitosan composite lithium battery diaphragm and its manufacturing method, to solve the problems of low porosity and poor thermal stability of the leading material of the lithium battery diaphragm to a certain extent

Method used

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  • Nano chitosan composite lithium battery diaphragm and manufacturing method thereof
  • Nano chitosan composite lithium battery diaphragm and manufacturing method thereof
  • Nano chitosan composite lithium battery diaphragm and manufacturing method thereof

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preparation example Construction

[0031] The nano-chitosan composite lithium battery diaphragm provided by the invention is prepared by the following method:

[0032] 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.

[0033] 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.

[0034] 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

[0042] The preparation process of nano-chitosan composite lithium battery separator is as follows:

[0043] 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.

[0044] 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.

[0045] 3. Put 200 grams of material B in the reactor, and add 10 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 205 grams...

Embodiment 2

[0049] The preparation process of nano-chitosan composite lithium battery separator is as follows:

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 4. With the C mat...

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Abstract

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. The nano chitosancomposite lithium battery diaphragm takes a three-dimensional conformation nano-chitosan sol / micron chitosan sol particle network as a support material and is loaded / combined with olefin copolymer latex / polyethylene oxide to form an ionic polymer diaphragm material. According to the preparation method, the nano chitosan sol particles and a micron chitosan sol particle network are taken as a supporting body, and then tape casting and drying are carried out to form the nano chitosan composite lithium battery diaphragm. The diaphragm has excellent three-dimensional network conformation, excellentheat resistance and dimensional stability and excellent electrolyte affinity, ionic conductivity, electrical insulation property and high physical and mechanical properties (tensile resistance, impact resistance, flexible bending and the like). By utilizing the characteristics of the nano chitosan diaphragm provided by the invention, the comprehensive performance of the lithium battery can be effectively improved.

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): H01M2/14H01M2/16H01M10/052
CPCY02E60/10
Inventor 王在福龚正烈
Owner 王在福
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