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Superhydrophobic coating applied to surfaces of lithium-ion battery and supercapacitor and preparation method of superhydrophobic coating

A technology for supercapacitors and lithium-ion batteries, applied in the direction of protection/regulation of hybrid/electric double-layer capacitors, coatings, secondary batteries, etc., can solve problems such as poor long-term durability, achieve good anti-corrosion performance, and avoid watermarks or water stains , enhance the effect of aesthetics

Inactive Publication Date: 2017-05-10
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the disclosed method, its long-term durability is poor; US Patent 2011 / 0159299 discloses a superhydrophobic coating, wherein the coating step includes plasma surface treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Superhydrophobic coatings include: hydrophobic agents, binders and stabilizers. It includes the following composition by weight percentage: hydrophobic agent: 10%-40%; binder 50%-80%; stabilizer: 5%-10%. The solid content of the binder is 30%-60%.

[0016] The hydrophobic agent used in the present invention is sodium dodecylbenzenesulfonate, the binder is polyacrylate emulsion, and the stabilizer is soluble starch. The simulation found that at low concentrations, dodecylbenzenesulfonate ions are difficult to form a hydrophobic structure on the surface of metals (alumina, iron oxide), and water molecules directly interact with the surface of aluminum oxide (iron oxide). The angle between the carbon chain of dodecanoic acid and the surface of alumina (iron oxide) gradually increases until a monolayer saturated adsorption state is formed. The superhydrophobic coating composition is used for the surfaces of lithium ion batteries and supercapacitors, and can be convenientl...

Embodiment 1

[0019] First, add 100 g of soluble starch, while stirring, slowly add 400 g of sodium dodecylbenzenesulfonate, slowly stir for 1 hour, then add 800 g of polyacrylic acid emulsion, and stir for 2 hours. The formulation of the superhydrophobic coating is completed. It is then sprayed onto the surface of the 18650 model lithium-ion battery steel case.

[0020] The 18650 type lithium-ion battery steel shell was placed in a salt spray corrosion test chamber, and the temperature was controlled at 35±2°C. The sodium chloride solution with a concentration of 5% was used for spraying, and the spraying time was set to 8h. After the time is up, take out the steel case of the lithium ion battery and wash it with clean running water at 40°C to remove the residue of the salt spray solution on the surface of the steel case. and dry immediately with a hairdryer. Watch for rust.

Embodiment 2

[0022] First, add 100 g of soluble starch, while stirring, slowly add 300 g of sodium dodecylbenzenesulfonate, slowly stir for 1 hour, then add 600 g of polyacrylic acid emulsion, and stir for 1 hour. The formulation of the superhydrophobic coating is completed. It is then sprayed onto the surface of the 18650 model lithium-ion battery steel case.

[0023] The 18650 type lithium-ion battery steel shell was placed in a salt spray corrosion test chamber, and the temperature was controlled at 35±2°C. The sodium chloride solution with a concentration of 5% was used for spraying, and the spraying time was set to 8h. After the time is up, take out the steel case of the lithium ion battery and wash it with clean running water at 40°C to remove the residue of the salt spray solution on the surface of the steel case. and dry immediately with a hairdryer. Watch for rust.

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Abstract

The invention provides superhydrophobic coating applied to surfaces of a lithium-ion battery and a supercapacitor and a preparation method of the superhydrophobic coating. In order to provide superhydrophobic coating with good high-temperature stability and an obvious anticorrosive effect, the invention adopts the technical scheme as follows: the superhydrophobic coating applied to the surfaces of the lithium-ion battery and the supercapacitor is characterized by comprising the following components in percent by mass: 10-40% of a hydrophobic agent, 50-80% of a bonding agent and 5-10% of a stabilizer. Emergence of watermarks or water stains is avoided, so that the attractiveness of a product is enhanced; the superhydrophobic coating has very good stability at high temperature, so that the superhydrophobic coating can be applied to high-tech fields (such as some high-temperature environments); the superhydrophobic coating has very good corrosion resistance.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic coating on the surface of a lithium ion battery and a supercapacitor, and the superhydrophobic coating can be applied to the surface of the lithium ion battery and the supercapacitor which need to be waterproof and rusted. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high operating voltage, and long cycle life. They have been widely used in civil equipment such as mobile phones, notebook computers, and digital products, as well as high-tech fields such as drones, aerospace, and satellites. In the preparation of lithium-ion batteries and supercapacitors, more or less watermarks remain on the surface, which not only affects its aesthetics, but also causes rust spots to form on corroded cells when further exposed to air. In addition, solid, liquid and gas adsorption or wettability phenomena are unavoidable for any surface and therefore ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D133/00C09D103/02C09D7/12C09D5/08H01M10/0525H01G11/14
CPCC08L2203/206C09D5/08C09D7/63C09D7/65C09D133/00C09D133/04H01G11/14H01M10/0525C08L3/02C08K5/42Y02E60/10Y02E60/13
Inventor 单传省刘宏关成善
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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