Method for manufacturing electrodes for electrochemical devices

By coating electrodes with an acrylic binder and rolling at high temperatures, the method simplifies the production process, reducing moisture and eliminating the need for a drying step, thus enhancing electrode adhesion and reducing costs for lithium-sulfur batteries.

JP2026500803APending Publication Date: 2026-01-08LG ENERGY SOLUTION LTD
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Patent Information

Application Number
JP2025539729
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-03-13
Filing Date
2024-02-29
Publication Date
2026-01-08

AI Technical Summary

Technical Problem

The production of lithium-sulfur battery electrodes using aqueous binders is complicated by the need for a drying step to remove moisture, increasing time and cost, and there are limitations on the use of such binders due to their complexity.

Method used

A method involving coating a current collector with an electrode-forming slurry containing an acrylic binder, rolling at 105°C or higher, and omitting a separate drying step post-rolling to reduce moisture content, thereby simplifying the process and enhancing electrode adhesion.

Benefits of technology

This method reduces moisture content and eliminates the need for a separate drying process, resulting in cost and time savings while producing electrodes with excellent adhesive strength for lithium-sulfur batteries.

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Abstract

The present invention relates to a method for manufacturing an electrode, comprising the steps of coating at least one surface of a current collector with an electrode-forming slurry and rolling the current collector coated with the electrode-forming slurry, wherein the electrode-forming slurry includes an electrode active material and an electrode binder, and the electrode binder includes an acrylic binder. The rolling is performed at a temperature of 105°C or higher, thereby advantageously enabling the manufacture of an electrode with a low water content through the rolling process alone, when an electrode is manufactured using a water-based binder.
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Citation Information

Patent Citations

  • Semi-solid lithium-sulfur battery and preparation method thereof

    CN114765272A

  • Polymer particle, polymer dispersing composition, slurry for battery electrode, electrode and battery

    JP2000100436A

  • Manufacturing method of anode

    JP2020123542A

  • Negative electrode for lithium ion secondary battery, process for producing the same, lithium ion secondary battery and process for producing the same

    WO2006075446A1

  • Solid electrolyte composition, all-solid-state secondary battery sheet, all-solid-state secondary battery electrode sheet, all-solid-state secondary battery, production method for all-solid-state secondary battery sheet, and production method for all-solid-state secondary battery

    WO2019098008A1