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Polymer binder,laminated porous membrane, battery and electronic device

A binder and polymer technology, used in battery pack parts, circuits, electrical components, etc., can solve the problems of thermal runaway and difficult heat diffusion, and achieve the effect of preventing thermal runaway

Pending Publication Date: 2021-11-30
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-adhesion separator and the pole piece are tightly bonded, and when a short circuit occurs inside the battery, heat is difficult to diffuse, which easily leads to thermal runaway

Method used

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  • Polymer binder,laminated porous membrane, battery and electronic device
  • Polymer binder,laminated porous membrane, battery and electronic device
  • Polymer binder,laminated porous membrane, battery and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Basic formulation of polymer binder:

[0114] In parts by weight, the monomer ratio is 15 parts of styrene, 30 parts of butadiene, 55 parts of methyl acrylate, and 2.1 parts of emulsifier sodium dodecylbenzenesulfonate; emulsifier octylphenol polyoxyethylene 1.1 part of ether; 0.55 part of initiator ammonium persulfate; 0.015 part of chelating agent EDTA tetrasodium salt, 0.4 part of reducing agent sodium sulfite; 0.2 part of regulator dodecyl mercaptan; 0.25 part of chain terminator hydroquinone as polymerization reaction additives.

[0115] The aggregation process is as follows:

[0116] Send distilled water and emulsifier into the reaction kettle replaced by argon, then add reducing agent, chelating agent, regulator, styrene, methyl acrylate into the reaction kettle, and pass argon for 20 minutes to replace the Oxygen, reflux, stir and pre-emulsify for 1h (40-50°C), raise the temperature of the reactor to 78°C quickly, add 30% initiator first, keep the reaction tem...

Embodiment 2

[0123] The difference between embodiment 2 and embodiment 1 is that methyl acrylate: styrene: butadiene in the polymer binder = 90%: 5%: 5%.

Embodiment 3

[0125] The difference between embodiment 3 and embodiment 1 is that methyl acrylate: styrene: butadiene in the polymer binder = 80%: 10%: 10%.

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PUM

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Abstract

Disclosed is a polymer binder comprising a copolymer formed by the polymerization of the first, second and third monomers. The softening point of polymer binder is 60 to 100; wherein the first monomer includes at least one of the compounds indicated by structural formula (I) or structural formula (II). The second monomer includes at least one of the compounds indicated by structural formula (III) or (IV), and the third monomer includes at least one of the compounds indicated by structural formula (V). Disclosed are a laminated porous membrane, a battery and an electronic device. The purpose of the invention is to provide the polymer binder capable of avoiding heat control and reducing heating box failure risk to protect the laminated porous membrane, the battery and the electronic device.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a polymer binder, a laminated porous membrane using the polymer binder, a battery including the laminated porous membrane, and an electronic device including the battery. Background technique [0002] Lithium-ion batteries have the advantages of large specific energy, high working voltage, low self-discharge rate, small size, light weight, etc., and have a wide range of applications in the field of consumer electronics. However, with the rapid development of electric vehicles and mobile electronic devices, people's requirements for battery performance (especially energy density and cycle performance) are getting higher and higher. [0003] In the prior art, it is usually necessary to install a high-adhesive separator to tightly bond the positive and negative electrodes and the separator together to ensure the interface adhesion between the separator and the electrode,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/409
CPCY02E60/10H01M50/409H01M50/446H01M50/451H01M50/417H01M50/489H01M50/443H01M50/42H01M50/449H01M10/052H01M4/622H01M50/491H01M50/414H01M50/457H01M50/403H01M10/0525C08F212/08C08F220/14C08F236/10C08F2800/20C09C3/10
Inventor 仇镔樊晓贺魏增斌
Owner NINGDE AMPEREX TECH
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