Electrode for lithium secondary battery, method for manufacturing same, and lithium secondary battery including same

By incorporating a multidirectionally fiberized binder in the electrode's active layer through a specific manufacturing process, the adhesive strength between electrode components is improved, enhancing electrode durability and battery performance.

JP7783881B2Active Publication Date: 2025-12-10LG ENERGY SOLUTION LTD
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Patent Information

Application Number
JP2023524433
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-09-15
Filing Date
2022-09-16
Publication Date
2025-12-10
Estimated Expiration
2042-09-16

AI Technical Summary

Technical Problem

Existing electrodes for lithium secondary batteries suffer from poor durability due to weak adhesive strength between the electrode active material, conductive material, and binder, particularly in dry processes, which affects battery performance.

Method used

The electrode incorporates a multidirectionally fiberized binder within the active layer, achieved through a manufacturing process involving low-temperature mixing, primary and secondary fiberization, and controlled pulverization steps to enhance binding strength.

Benefits of technology

The multidirectional fiberization of the binder improves the binding strength between the electrode components, resulting in enhanced electrode durability and overall battery performance.

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Patent Text Reader

Abstract

An electrode for a lithium secondary battery is provided, which comprises an active layer including an electrode active material, a conductive material, and a binder, the binder being multidirectionally fiberized. The active layer is ground using a blender with four blades at 10,000 rpm for 30 seconds to an average particle size (D 50 ) is 200 μm to 500 μm. In the electrode for a lithium secondary battery, the binder contained in the active layer is fiberized in multiple directions, thereby improving the binding strength between the electrode active material, the conductive material, and the binder in the active layer, thereby improving the durability of the electrode.
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Citation Information

Patent Citations

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    JP1983165246A

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  • Positive electrode sheet and non-aqueous electrolytic solution battery

    JP2005032584A

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    JP2007026984A

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    JP2008541339A