Yonsei University develops fluoride-based solid electrolyte for high-voltage all-solid-state batteries

The research achieves groundbreaking energy density and stability in ASSBs, enhancing safety and longevity for electric vehicles and renewable energy storage

Researchers at Yonsei University in Seoul, South Korea, have developed a fluoride-based solid electrolyte (LiCl–4Li₂TiF₆) that enables all-solid-state batteries (ASSBs) to operate beyond 5 volts safely, overcoming a significant voltage stability barrier in battery technology. This development enhances ionic conductivity, prevents interfacial degradation, and achieves record energy density, making it a promising candidate for next-generation electric vehicles and renewable energy storage.