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Simulated mussel protein environment-friendly lithium ion battery adhesive

A lithium-ion battery, environmentally friendly technology, applied in adhesive types, alginic acid adhesives, chitin adhesives, etc.

Active Publication Date: 2013-10-09
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

200710009965.7 Provides a method for preparing marine mussel-thick shell mussel adhesion protein waterproof bioadhesive with degradability, water resistance and good biocompatibility through biogenetic engineering method, but using mussel protein adhesive Attached mechanism, by simulating the structure of mussel protein to synthesize lithium-ion battery adhesive No related patents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Dissolve 1 g of sodium alginate, 0.2 g of ethyl dimethylaminopropyl carbodiimide and 0.2 g of hydroxybutadiene imine in phosphate buffer with pH = 6, stir at room temperature for 20 minutes, and then add 0.2 g dopamine and reacted at room temperature for 12 hours, and the product was precipitated with a large amount of ethanol to form a 5% aqueous solution.

Embodiment 2

[0014] Take 10g of the binder aqueous solution with a mass fraction of 5% prepared in Example 1 and 10g of modified natural graphite and stir evenly to form a negative electrode slurry, and then apply the slurry evenly on the copper foil, and then heat it at 120°C Under drying, rolling, and punching, a circular negative electrode sheet with a radius of 12 mm and a thickness of 80 microns was obtained. After vacuum drying at a temperature of 120 degrees, it was placed in a glove box with a dry argon atmosphere, and the metal lithium electrode Paired and assembled into a half-battery, the electrolyte is 1M lithium hexafluorophosphate (EC / DMC / EMC=1:1:1(v)), the diaphragm is a polypropylene diaphragm, and the lithium-ion half-battery prepared by this adhesive is charged at a current of 0.2C Discharge, the first reversible capacity reaches 350mAh / g, and the electrode has no material drop.

[0015] Lithium cobalt oxide is used as the positive electrode, 1M lithium hexafluorophosphat...

Embodiment 3

[0017] Dissolve 1g of sodium carboxymethylcellulose, 0.3g of ethyldimethylaminopropyl carbodiimide and 0.3g of hydroxybutadiene imine in phosphate buffer at pH=6, and stir at room temperature for 20 minutes Then add 0.15g dopamine and 0.15g histidine and react at room temperature for 12 hours, the product is precipitated with a large amount of ethanol and then made into an aqueous solution with a mass fraction of 5% and 0.1g lithium hydroxide is added.

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Abstract

The invention relates to a preparation method and application of an environment-friendly lithium ion battery, and in particular relates to a simulated mussel protein environment-friendly lithium ion battery adhesive. By simulating the molecular structure and action mechanism of mussel protein, histidine and dopamine are connected to polyacrylic acid, polymaleic acid, sodium alginate, sodium carboxymethylcellulose, carboxymethyl chitin, carboxymethyl chitosan, abietic acid and other natural or synthesized polymer to prepare a series of aqueous adhesives. The adhesive has a good adhering effect for various cathode materials such as carbon black, graphite and silicon. By adopting the adhesive provided by the invention, various properties of a lithium ion battery can be obviously improved, and especially cycle property of a silicon cathode material in a battery can be obviously improved.

Description

technical field [0001] The invention belongs to the field of adhesive preparation and relates to the preparation of a class of environment-friendly lithium ion battery adhesive. Background technique [0002] At present, the commonly used binder in the industrial production of lithium-ion batteries is polyvinylidene fluoride, and N-methylpyrrolidone must be used as a solvent during use. The health of the staff is seriously endangered. Water-based adhesives have the advantages of environmental protection and pollution-free. In recent years, people have researched and developed a large number of water-based adhesives, such as modified starch series (CN200380102888.X, CN102876266 A), multi-component copolymer emulsion (CN200910193676.6, CN01108524 .X), etc., but currently the most commonly used water-based binders such as sodium carboxymethyl cellulose, etc., still have low ionic conductivity, low adhesion to electrode materials and selectivity to electrode materials, which ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/02C09J135/00C09J105/04C09J105/08H01M4/62
CPCY02E60/10
Inventor 崔光磊段玉龙刘志宏韩鹏献
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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