Dry electrode, manufacturing method thereof, secondary battery comprising dry electrode, and energy storage device

The low-shear mixing and grinding process for dry electrode manufacturing addresses issues of active material pulverization and binder cutting, resulting in a flexible and mechanically robust dry electrode suitable for mass production.

KR102993458B1Active Publication Date: 2026-07-21LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-08-13
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Conventional dry electrode manufacturing processes face issues such as active material pulverization, binder fiber cutting, and equipment blockages due to high-shear mixing, leading to reduced mechanical performance and difficulties in mass production.

Method used

A method involving low-shear mixing and grinding of a mixture comprising an active material, conductive material, and binder, followed by calendering and lamination onto a current collector, to produce a flexible and porous dry electrode.

Benefits of technology

Minimizes active material pulverization, maximizes binder fiberization, and facilitates mass production by ensuring flexibility and uniformity, reducing interfacial resistance and enhancing mechanical performance.

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Abstract

According to one embodiment of the present invention, an electrode powder for manufacturing a dry electrode for a secondary battery is provided, wherein the powder comprises an active material, a conductive material, and a binder, and has a resistivity of 700 Ω·cm or less when pressurized at a pressure of 50 MPa, a method for manufacturing the same, a method for manufacturing a dry electrode using the same, a dry electrode, a secondary battery including the same, an energy storage device, and a dry electrode manufacturing device.
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Citation Information

Patent Citations

  • Method for Preparing Electrode for Secondary Battery And Electrode Prepared by the Same

    KR1020190035579A

  • Electrode for secondary battery

    JP2007026984A

  • Low cost high power dry powder injected electrodes and method of making same

    US20200013563A1