Palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and preparation method thereof

A technology of ion battery and alumina, which is applied in the direction of secondary battery, battery pack parts, separator/film/diaphragm/spacer element, etc. It can solve the problems of high price, high price and small specific surface area of ​​coated diaphragm , to achieve the effect of improving market competitiveness and reducing costs

Inactive Publication Date: 2016-08-31
湖南锂顺能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 201210091286.X discloses a method for preparing a β-alumina ceramic diaphragm, Chinese patent 201510291767.9 discloses a method for preparing a ceramic diaphragm modified with nano-alumina particles, and Chinese patent 201310572688.6 discloses a ceramic diaphragm and its The preparation method and application are all made of alumina, binder and related auxiliary materials. After the slurry is prepared, it is evenly coated on the surface of the traditional polyethylene or polypropylene diaphragm. Due to the high price of high-purity alumina, the price of the corresponding coated diaphragm is relatively high. High, which is not conducive to reducing the production cost of lithium-ion batteries, and h

Method used

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  • Palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and preparation method thereof
  • Palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and preparation method thereof
  • Palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and preparation method thereof

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Embodiment 1

[0029] The palygorskite / alumina composite lithium-ion battery coating diaphragm of the present embodiment uniformly coats a layer of palygorskite / alumina slurry on the surface of the lithium-ion battery separator substrate, and the palygorskite / alumina slurry The material is made of the following raw materials in mass percentage: surfactant 1.2%, thickener 0.8%, binder 10.0%, dispersant 0.4%, β-palygorskite / alumina mixture 35.0%, defoamer 5.6% , solution 47.0%.

[0030] In this embodiment, the mass of palygorskite in the β-palygorskite / alumina mixture is 50.0% of the mass of β-alumina, and the particle diameters of the palygorskite and β-alumina are both 600-700 nm.

[0031] In this embodiment, the surfactant is fatty acid glyceride.

[0032] In this embodiment, the thickener is sodium carboxymethyl cellulose.

[0033] In this embodiment, the binder is battery grade LA133, and the solution is deionized water.

[0034] In this embodiment, the dispersant is TH-904 dispersant....

Embodiment 2

[0046] The palygorskite / alumina composite lithium-ion battery coating separator of the present embodiment is coated with a layer of palygorskite / alumina slurry on the surface of the lithium-ion battery separator substrate, and the palygorskite / alumina slurry is Made from the following raw materials in mass percent: 1.0% surfactant, 0.8% thickener, 10.0% binder, 0.2% dispersant, 40.0% palygorskite / alumina mixture, 5.0% defoamer, solution 43 %.

[0047] In this embodiment, the mass of palygorskite in the α-palygorskite / alumina mixture is 40.0% of the mass of α-alumina, and the particle diameters of the palygorskite and α-alumina are both 500-600 nm.

[0048] In this embodiment, the surfactant is a mixed surfactant of fatty acid glyceride and fatty acid sorbitan.

[0049] In this embodiment, the thickener is xanthan gum.

[0050] In this embodiment, the binder is a mixed binder of battery grade styrene-butadiene rubber emulsion and LA132, and the solution is deionized water.

...

Embodiment 3

[0063] The palygorskite / alumina composite lithium-ion battery coating separator of the present embodiment is coated with a layer of palygorskite / alumina slurry on the surface of the lithium-ion battery separator substrate, and the palygorskite / alumina slurry is Made from the following raw materials in mass percentage: 1.2% surfactant, 0.6% thickener, 7.0% binder, 0.2% dispersant, 27.8% palygorskite / alumina mixture, 3.2% defoamer, 60.0% solution %.

[0064] In this embodiment, the mass of palygorskite in the β-palygorskite / alumina mixture is 30.0% of the mass of β-alumina, and the particle diameters of the palygorskite and β-alumina are both 500-700 nm.

[0065] In this embodiment, the surfactant is polyethylene glycol monooctylphenyl ether.

[0066] In this embodiment, the thickener is a mixed thickener of sodium carboxymethylcellulose and xanthan gum.

[0067] In this embodiment, the binder is battery grade LA132, and the solution is deionized water.

[0068] In this embod...

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Abstract

The invention discloses a palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and a preparation method thereof. The surface of a lithium ion battery diaphragm substrate of the palygorskite/barium sulfate composite lithium ion battery coating diaphragm disclosed by the invention is uniformly coated by a layer of palygorskite/barium sulfate slurry; the palygorskite/barium sulfate slurry is prepared from the following raw materials by weight percent: 0.7-1.5% of a surfactant, 0.5-1.0% of a thickening agent, 6.0-12.0% of an adhesive, 0.1-0.5% of a dispersing agent, 20.0-50.0% of a palygorskite/barium sulfate mixture, 3.0-7.0% of a defomaing agent and 40.0-70.0% of a solution, wherein the sum of the percentages of the raw materials is 100.0%. The invention further discloses a preparation method. By adopting the palygorskite/barium sulfate composite lithium ion battery coating diaphragm disclosed by the invention, the electrochemical property of a lithium ion battery can be effectively improved by the related product, the cost is low, and great competitive advantages in market can be achieved.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a palygorskite / alumina composite lithium-ion battery coating diaphragm and a preparation method thereof. Background technique [0002] According to the National Bureau of Statistics, from 2005 to 2014, the average annual growth rate of automobiles reached 15.61%. However, the increase in the number of automobiles has brought about problems such as the reduction of petroleum energy, environmental pollution, and urban space congestion, so new energy vehicles have developed rapidly. In 2014, a total of 353,522 electric vehicles were sold in the global market, a year-on-year increase of 53.5%. According to statistics from the Ministry of Industry and Information Technology, from January to June 2015, my country's new energy vehicles produced a total of 78,500 units, a year-on-year increase of 3.0 times. The new energy vehicle market has huge prospects. As an important chemical po...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/0525H01M50/409
CPCH01M10/0525H01M50/403H01M50/409Y02E60/10
Inventor 何鹏飞沈智郑拥军李勇邓彬周间卿
Owner 湖南锂顺能源科技有限公司
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