Polyethylene Oxide 7M CAS 25322-68-3 Polymer Electrolyte Base for Lithium Battery
Polyethylene Oxide MW 7,000,000 (PEO 7M, CAS 25322-68-3) is linear ultra-high molecular weight water-soluble polyether polymer with high purity. As the base material of lithium battery solid polymer electrolyte, PEO molecular chains can complex with lithium salts and form continuous ion conduction pathways. It possesses excellent film-forming ability and stable electrochemical properties, which helps reduce interface impedance inside the cell. It is a core base polymer for developing high safety
Product Overview
Polyethylene Oxide MW 7,000,000 (CAS 25322-68-3) is high purity ultra-high molecular weight PEO customized for solid lithium battery electrolyte research and manufacturing. Medium molecular weight PEO cannot form stable continuous conductive network; excessively high molecular weight grades cause poor melt fluidity and difficult film processing. This 7M grade balances ionic conduction performance, mechanical strength and thermal processability.After compounding with lithium salt and auxiliary additives, uniform solid electrolyte membrane can be manufactured. The polymer matrix isolates positive and negative electrodes while enabling lithium ion migration, helping batteries achieve higher safety without liquid electrolyte leakage risk.
Key Features
- Molecular Weight: 7,000,000, CAS 25322-68-3, white free-flowing fine powder
- Abundant ether oxygen groups, strong coordination capacity with lithium salt
- Form continuous lithium-ion transport channels for solid electrolyte
- Outstanding film-forming performance, support self-standing electrolyte membrane preparation
- Good mechanical strength to suppress lithium dendrite growth
- Compatible with various lithium salts and inorganic ceramic fillers
- Stable electrochemical window, suitable for solid-state battery assembly
Main Applications
- Base matrix for solid polymer electrolyte of lithium metal batteries
- Ion conductive raw material for all-solid-state lithium-ion battery
- Functional polymer for gel polymer lithium battery electrolyte
- Research material for lithium secondary battery electrolyte formulation
Usage Guidance
Dry PEO powder thoroughly before material preparation to eliminate moisture. Uniformly blend with lithium salt, ceramic fillers under inert atmosphere. Prepare electrolyte membrane via solution casting or hot pressing process. Conduct ionic conductivity test, electrochemical stability test and cell cycling evaluation. Strictly avoid water and air contamination during production.
Storage & Package
Hermetic sealed packaging. Store in constant low humidity dry warehouse, isolated from moisture, oxygen and direct sunlight. Standard package: 25kg moisture-proof aluminum foil lined kraft bag. Shelf life: 12 months under sealed dry storage.
Service Support
High purity test samples available for battery lab research. Stable bulk supply. We provide COA, TDS and formulation technical consultation. Welcome to inquire factory quotation.
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