The Challenge:
Batteries Need Safety At Scale
In lithium-ion applications, ceramic separators must resist shrinkage and breakdown under extreme heat or pressure. Any contamination or inconsistency in the alumina coating layer can lead to field failures or rejected cells, putting safety at risk.
How We Help:
Engineered Alumina For Battery-Grade Purity
We supply high-purity alumina powders with optimized particle size and morphology for lithium-ion battery separators. Designed to meet performance and safety demands, our materials support uniform coatings, reliable adhesion, and reduced ionic interference at scale.
Related Products
Ultra-high-purity alumina for lithium-ion separator coatings. Also available in beads, pellets, and customizable formats. If you don’t find what you need, we can create a custom solution upon request.
Ultra-high-purity alumina for lithium-ion separator coatings. Also available in beads, pellets, and customizable formats. If you don’t find what you need, we can create a custom solution upon request.
Pure Precision. Proven Performance.
Battery customers choose POLARGuard™ for alumina that meets the toughest separator specs, with purity and consistency they can prove.
High Thermal Resistance
Improves separator shrink resistance under elevated temperatures.
Controlled PSD and Shape
Ensures uniform coating dispersion and coating adhesion.
Ultra-Low Na and Fe
Minimizes conductive risk in high-voltage cells.
The Processes We Protect
Our alumina supports battery manufacturing processes focused on safety, strength, and longevity.
Traceable By Design
In regulated environments, data matters. We retain physical samples and link every batch to detailed records, including validated test methods. That means you can access the exact specs and purity values you need, whether it’s for audit documentation or product validation months down the line.
Frequently asked questions
A: Yes. Alumina is applied to separator films as a ceramic coating that improves thermal and mechanical properties. It’s a critical layer in many safety-first battery designs.
A: We offer 4N and 5N grades with submicron to fine PSD options. Battery-grade products are optimized for purity, flowability, and morphology.
A: Yes. We support custom specs for separator coating behavior and formulation performance. Reach out to discuss your process needs.
A: All POLARGuard™ materials are processed in Oakville, Canada. We support dual-site sourcing and maintain full batch documentation.