Unlike lithium, sodium is abundant and widely available, making it a more accessible option for large-scale applications like electric vehicles and grid storage. The Western University team is developing a solid-state sodium battery that leverages a chemically engineered electrolyte designed for stability, safety, and improved performance.
The new electrolyte incorporates sulfur and chlorine to form a solid structure that allows sodium ions to move more freely — addressing a longstanding conductivity issue in sodium-based systems.
The researchers emphasize that solid-state configurations reduce the risk of fire while offering higher energy density potential — critical for sectors where downtime or failure isn't an option.
To validate the material's performance, the team turned to the Canadian Light Source (CLS), a synchrotron research facility at the University of Saskatchewan. Using high-intensity X-ray imaging, they were able to observe how sodium ions travel through the electrolyte at the atomic level.
This capability to map ionic movement in real time is helping researchers refine material properties faster than conventional trial-and-error methods allow. The ability to visualize conductivity mechanisms on such a fine scale not only benefits battery research but also has implications for broader fields like clean technology and advanced manufacturing.
A major challenge in solid-state battery design is compatibility between materials. Many solid electrolytes degrade when in contact with electrodes or other components. However, Western’s formulation has shown early signs of stability with common battery materials — a promising indicator for future scalability.
While commercial rollout is not imminent, this research points to a viable direction for energy storage beyond lithium. In a landscape increasingly shaped by supply chain constraints and sustainability goals, sodium-based solid-state batteries could offer industries a safer and more resilient platform.
