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Binder solution for lithium ion battery electrode, slurry for lithium ion battery electrode, lithium ion battery electrode, and lithium ion battery

A lithium-ion battery and adhesive technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, lithium batteries, etc. Good elasticity, good capacity retention, and high adhesion

Pending Publication Date: 2021-03-05
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, depending on the electrode active material, expansion and contraction easily occur with charge and discharge
Therefore, the electrode for lithium ion batteries, which tends to expand and contract with charge and discharge, changes in volume (resilience) compared with the initial stage due to repeated charge and discharge, and the electrical characteristics such as cycle characteristics of lithium ion batteries using this electrode for lithium ion batteries easy to lower

Method used

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  • Binder solution for lithium ion battery electrode, slurry for lithium ion battery electrode, lithium ion battery electrode, and lithium ion battery
  • Binder solution for lithium ion battery electrode, slurry for lithium ion battery electrode, lithium ion battery electrode, and lithium ion battery
  • Binder solution for lithium ion battery electrode, slurry for lithium ion battery electrode, lithium ion battery electrode, and lithium ion battery

Examples

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Embodiment

[0218] Hereinafter, the present invention will be specifically described by way of examples and comparative examples. However, the description of the above-mentioned preferred embodiments and the following examples are provided for the purpose of illustration only, and are not provided for the purpose of limiting the present invention. Therefore, the scope of the present invention is not limited to the embodiments or examples specifically described in this specification, but is limited only by the scope of the claims. In addition, in each Example and a comparative example, unless otherwise indicated, numerical values, such as a part and %, are based on mass.

[0219] 1. Manufacture of (A) component

manufacture example 1

[0221] Add 1450g ion-exchanged water, 137.3g (1.5580mol) hydroxyethyl vinyl ether, 188.6g (1.3266mol) 50% acrylamide aqueous solution, 0.09g (0.0006 mol) sodium methallyl sulfonate (Metalyl sulfonate Natrium), after removing oxygen in the reaction system with nitrogen gas, the temperature was raised to 50°C. 2.3 g of 2,2'-azobis-2-amidinopropane dihydrochloride (2,2'-Azobis-2-Amijinopropane dihydrochloride) (manufactured by Nippon Chemical Co., Ltd., product name "NC-32"), 50 g of ion-exchanged water, heated up to 80° C. for 3 hours of reaction to obtain an aqueous solution containing a water-soluble polymer.

manufacture example 2

[0223] 550 g of ion-exchanged water was added to a reaction device equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe, and after removing oxygen in the reaction system with nitrogen, the temperature was raised to 80°C. 99.0g (1.1236mol) hydroxyethyl vinyl ether, 870.8g (6.1241mol) 50% acrylamide aqueous solution, 0.2g (0.0014mol) sodium methallyl sulfonate, 100g ion-exchanged water were added dropwise thereto simultaneously A mixed solution of 5.3 g of 2,2'-azobis-2-amidinopropane dihydrochloride (manufactured by Nippon Chemical Co., Ltd., product name "NC-32"), and 170 g of ion-exchanged water. It added dropwise over 3 hours while keeping the temperature at 80° C. to obtain an aqueous solution containing a water-soluble polymer.

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PUM

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Abstract

[Problem] Provide are an aqueous binder solution for a lithium ion battery electrode, a slurry for a lithium ion battery electrode, a lithium ion battery electrode, and a lithium ion battery. [Solution] The present disclosure provides an aqueous binder solution for a lithium ion battery electrode, the aqueous binder solution for a lithium ion battery electrode containing a water-soluble polymer (A), the water-soluble polymer (A) being a polymer of a monomer group, the monomer group containing 5-80 mol% of a hydroxyl group-containing vinyl ether (a) per 100 mol% of the monomer group. In one embodiment, the monomer group contains 20 mol% to 95 mol% of a (meth) acrylamide group-containing compound (b).

Description

technical field [0001] The present disclosure relates to an aqueous binder solution for lithium-ion battery electrodes, a slurry for lithium-ion battery electrodes, a lithium-ion battery electrode, and a lithium-ion battery. Background technique [0002] Lithium-ion batteries have the characteristics of small size, light weight, high energy density, and can be repeatedly charged and discharged, and have been used in a wide range of applications. Therefore, in recent years, for the purpose of further enhancing the performance of lithium-ion batteries, improvements in battery components such as electrodes have been studied. [0003] Both the positive electrode and the negative electrode of the lithium ion battery are manufactured by the following method: the slurry formed by dispersing the electrode active material and the binder resin in a solvent is coated on both sides of the current collector (such as a metal foil), and the solvent is dried. After removing the formed elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/04H01M10/0525
CPCH01M4/622H01M4/0404H01M10/0525H01M4/139H01M4/1391H01M4/13H01M4/131Y02E60/10Y02E60/50H01M10/052C08F216/1416C08F220/56C08F220/14H01M4/8828
Inventor 大久保胜也合田英生笹川巨树青山悟
Owner ARAKAWA CHEM IND LTD