Separator for power storage device and method for manufacturing separator for power storage device
A cross-linked polyethylene porous layer with a carboxylic anhydride structure and functional groups addresses safety and heat resistance issues in lithium-ion battery separators, enhancing long-term stability and thermal resistance.
JP2025153945APending Publication Date: 2025-10-10ASAHI KASEI BATTERY SEPARATOR CORP
Patent Information
- Application Number
- JP2024056681
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-10-10
Smart Images
Figure 2025153945000001
Abstract
To provide a separator for a power storage device that has a crosslinked structure that provides excellent long-term stability within the power storage device and excellent heat resistance, and a method for manufacturing the separator.SOLUTION: A separator for a power storage device contains polyethylene (A) having a viscosity average molecular weight of 200,000 or more and 2,000,000 or less, polyethylene (B) having a carboxylic anhydride structure, and a crosslinking compound (C) having two or more functional groups of one or more types selected from hydroxy groups and amino groups, and has a crosslinked polyethylene porous layer having a gel fraction of 1% or more and 80% or less as measured in accordance with JIS-K6796.SELECTED DRAWING: None
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Citation Information
Patent Citations
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