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Anode mixture for secondary battery, and anode and secondary battery including same

A secondary battery and mixture technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as polluted rolls, anode active material desorption, instability, etc., to achieve improved life, high initial adhesion, and reduced The effect of the initial resistance

Pending Publication Date: 2022-06-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As the content of the anode active material in the anode mixture increases and the content of SBL and CMC decreases, the slurry phase of the anode mixture may become unstable, thereby in subsequent processes (such as applying and drying the anode mixture on the anode current collector, followed by Rolling process) leads to desorption of anode active material and contamination of rolls

Method used

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  • Anode mixture for secondary battery, and anode and secondary battery including same
  • Anode mixture for secondary battery, and anode and secondary battery including same
  • Anode mixture for secondary battery, and anode and secondary battery including same

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0161] Preparation Example 1: AAM (70 parts by weight) / AA (5 parts by weight) / AN (25 parts by weight) copolymer

[0162] 250 parts by weight of distilled water, 70 parts by weight of acrylamide, 5 parts by weight of acrylic acid and 25 parts by weight of acrylonitrile were added to the pressure stirrer, followed by 0.4 parts by weight of sodium lauryl sulfate as an emulsifier and 0.5 parts by weight of parts of potassium persulfate as a polymerization initiator to initiate the reaction. Subsequently, the reaction was performed for 10 hours while stirring well and keeping at 70°C to obtain a binder latex having a solid content of 40%.

preparation Embodiment 2

[0163] Preparation Example 2: AAM (60 parts by weight) / AA (20 parts by weight) / AN (20 parts by weight) copolymer

[0164]250 parts by weight of distilled water, 60 parts by weight of acrylamide, 20 parts by weight of acrylic acid and 20 parts by weight of acrylonitrile were added to the pressure stirrer, followed by 0.4 parts by weight of sodium lauryl sulfate as an emulsifier and 0.5 parts by weight of parts of potassium persulfate as a polymerization initiator to initiate the reaction. Subsequently, the reaction was performed for 10 hours while stirring well and keeping at 70°C to obtain a binder latex having a solid content of 40%.

preparation Embodiment 3

[0165] Preparation Example 3: Preparation of One-Component Adhesive A

[0166] 0.3 parts by weight of HASE and 0.7 parts by weight of the AAM / AA / AN copolymer of Preparation Example 1 were mixed at room temperature to obtain a one-component adhesive A.

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Abstract

The present disclosure relates to an anode mixture for a secondary battery, an anode including the same, and a secondary battery. Specifically, in one embodiment of the present disclosure, there is provided an anode mixture for a secondary battery including a binder composition in a specific content range, the binder composition being a mixture of an AAM / AA / AN copolymer and HASE.

Description

technical field [0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of Korean Patent Application Nos. 10-2020-0138514 filed on October 23, 2020 and 10-2021-0141343 filed on October 21, 2021 with the Korean Intellectual Property Office, the disclosures of which are provided by All references are incorporated into this specification. [0003] The present disclosure relates to an anode mixture for a secondary battery, an anode including the anode mixture, and a secondary battery. Background technique [0004] As the application of secondary batteries, which have been limited to small electronic devices, has expanded to various fields such as automobiles, power storage, and the like, various efforts have been made to improve the performance of secondary batteries. [0005] As an example, a method of increasing the capacity and efficiency of a secondary battery by using an anode having a high content of anode active material has been prop...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/133H01M4/1393H01M10/0525
CPCH01M10/0525H01M4/133Y02E60/10H01M4/587H01M4/622H01M4/139H01M4/0404C08F2/22C08F220/06C08F220/46C08F220/48C08F220/56H01M4/583
Inventor 崔哲勋康旼阿李诚镇
Owner LG CHEM LTD