Copolymer for a separation membrane and a secondary battery including the same
The use of a copolymer-based slurry composition with inorganic particles addresses the heat shrinkage and mechanical instability issues of polyolefin-based separation membranes, resulting in improved adhesion, heat resistance, and battery safety.
JP2025519622APending Publication Date: 2025-06-26HANSOL CHEM
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Patent Information
- Application Number
- JP2024572718
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-06-16
- Filing Date
- 2022-06-29
- Publication Date
- 2025-06-26
AI Technical Summary
Technical Problem
Existing polyolefin-based separation membranes in lithium secondary batteries suffer from heat shrinkage and mechanical instability, leading to potential short circuits and safety issues.
Method used
A slurry composition containing a copolymer with specific monomer units and inorganic particles is applied to enhance the adhesive force and heat resistance of the separation membrane.
Benefits of technology
The improved separation membrane exhibits enhanced adhesion and heat resistance, leading to better battery performance and safety by minimizing the risk of short circuits.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to a copolymer containing, based on 100% by weight of the total weight of the copolymer, vinyl acetate monomer units of 15% by weight or less, acrylate monomer units of 10% by weight or more and 55% by weight or less, and acrylic acid monomer units bonded to one or more selected from the group consisting of alkali metals and acetate salt compounds containing alkali metals of 1% by weight or more and 10% by weight or less, a slurry composition containing the same, a separation membrane, and a secondary battery.
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