Argonne Identifies Magnesium Oxide as Key Coating for Solid-State Batteries — Argonne National Laboratory

Event summary

Argonne National Laboratory researchers identified magnesium oxide as a promising coating for sulfide-based solid electrolytes in solid-state batteries.
The team used density functional theory to screen oxide coatings and tested them on lithium phosphorus sulfur chloride (LPSCl) electrolyte.
Magnesium oxide improved electrolyte stability, reduced interface resistance, and enhanced performance while blocking unwanted electron flow.
Zirconium oxide performed poorly due to unfavorable reaction products, while zinc oxide showed beneficial transport behavior despite higher reactivity.

The big picture

Solid-state batteries promise higher energy density and improved safety over lithium-ion, but their adoption hinges on overcoming chemical fragility at key interfaces. Argonne's research offers a predictive method to evaluate protective coatings, potentially accelerating the development of stable, high-performance solid electrolytes. This work could reshape the competitive landscape in battery technology, particularly as automakers and energy storage providers seek safer, more efficient alternatives.

What we're watching

Commercialization Pace: How quickly Argonne's findings will translate into commercial solid-state battery production.
Material Scaling: Whether magnesium oxide coatings can be efficiently scaled for mass manufacturing.
Competitive Advantage: The extent to which this discovery differentiates Argonne in the race for next-generation battery materials.