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Binder composition for electrode of secondary battery, and electrode mixture

A secondary battery and adhesive technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of accelerated swelling and reduced battery stability, and achieve improved performance and excellent adhesion. Strength, effect of excellent latex stability

Active Publication Date: 2020-11-06
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature of the battery increases with the use of electronic products, the decomposition of the electrolyte is promoted, thereby accelerating the swelling phenomenon, which causes the stability of the battery to decrease

Method used

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  • Binder composition for electrode of secondary battery, and electrode mixture
  • Binder composition for electrode of secondary battery, and electrode mixture
  • Binder composition for electrode of secondary battery, and electrode mixture

Examples

Experimental program
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preparation example Construction

[0090] Simultaneously, according to another aspect of the present invention, a kind of preparation method of the adhesive composition for secondary battery electrode is provided, and this preparation method comprises the following steps:

[0091] In the presence of an emulsifier and a polymerization initiator, the aliphatic conjugated diene-based first monomer; selected from aromatic vinyl-based monomers, alkyl (meth)acrylate monomers, (meth)acrylic monomers One or more second monomers in amide monomers, alkenyl cyanide monomers and unsaturated carboxylic acid monomers; and the third monomer represented by Chemical Formula 1 is emulsion polymerized to prepare the copolymer,

[0092] Wherein, relative to the total amount of the first monomer, the second monomer and the third monomer, the amount of the third monomer is 0.5% to 0.95% by weight.

[0093] In this respect, the first monomer, the second monomer and the third monomer are the same as described above.

[0094] In addit...

Embodiment 1

[0139] (1) Preparation of adhesive

[0140] (a) 1,3-butadiene (44 g), (b1) styrene (47.05 g), (b2) methyl methacrylate (5 g), (b5) acrylic acid and itaconic acid ( 3g) and (c) sodium 3-allyloxy-2-hydroxypropylsulfonate (0.95g), and sodium lauryl sulfate and polyethylene oxide lauryl ether (1.3g) as emulsifiers were added to Contains NaHCO 3 water as a buffer, and the temperature was raised to 75°C, and then ammonium persulfate was added as a polymerization initiator to perform single polymerization. The reaction was carried out for about 8 hours while maintaining the temperature at 75° C., thereby preparing an adhesive composition including the copolymer in the form of latex particles. The adhesive composition of Example 1 thus prepared had a total solid content of 40%, and an average particle diameter of latex particles measured using a particle size analyzer (NICOMP AW380, manufactured by PSS) was 110 nm. The pH of the fully polymerized adhesive composition was adjusted t...

Embodiment 2

[0146] (1) Preparation of adhesive

[0147] In addition to using (a) 1,3-butadiene (45 g), (b1) styrene (46.3 g), (b2) methyl methacrylate (5 g), (b5) acrylic acid and itaconic acid (3 g) and (c) Except for 3-allyloxy-2-hydroxypropyl sodium sulfonate (0.7 g) as a monomer, polymerization was carried out in the same manner as in Example 1 to prepare a latex containing 111 nm in average particle diameter. Adhesive composition of copolymer in particulate form.

[0148] (2) Preparation of negative electrode mixture and manufacture of negative electrode

[0149] Using the binder of Example 2 instead of the binder of Example 1, an anode mixture was prepared in the same manner as in Example 1, and the anode mixture of Example 2 was manufactured using the anode mixture.

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Abstract

The present invention relates to a binder composition for an electrode of a secondary battery, and an electrode mixture comprising same and, more specifically, to a binder composition for an electrodeof a secondary battery, and an electrode mixture comprising same, wherein the binder composition has excellent latex stability and simultaneously provides excellent binding strength with respect to an active material and the electrode, thereby being able to improve the performance of the secondary battery.

Description

technical field [0001] Cross References to Related Applications [0002] This application is based on and claims priority from Korean Patent Application No. 10-2018-0136197 filed on November 7, 2018, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present invention relates to a binder composition for secondary battery electrodes and an electrode mixture comprising the binder composition. Background technique [0004] The rapid increase in the use of fossil fuels has led to an increase in demand for use of alternative energy or clean energy, and as part of this demand, the most active field of research is the field of secondary batteries using electrochemistry. [0005] In recent years, with the technological development and increasing demand for portable devices such as portable computers, mobile phones, cameras, etc., the demand for secondary batteries as energy sources has been rapidly increasing. Among these secondary batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13C08L9/04C08L9/08H01M10/052H01M50/449H01M50/451
CPCH01M10/052C08L9/04C08L9/08Y02E60/10H01M4/622H01M50/451H01M50/449H01M4/13H01M2300/0025H01M10/0525
Inventor 韩善姬康旼阿柳东彫韩正燮孙祯晚崔哲勋
Owner LG CHEM LTD
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