Solid-state electrolyte interface layer

Background

Solid-state batteries (SSBs) hold immense potential for energy storage due to their enhanced safety and energy density compared to lithium-ion batteries. However, a critical challenge hindering their commercialization is the instability at the electrode-solid-state electrolyte (SSE) interface, leading to poor cycle life and safety concerns. Current approaches focus on introducing inert barriers, but these often compromise ionic conductivity.

Technology overview

This invention presents a novel approach to stabilize the electrode-SSE interface by introducing a thin, in-situ formed intermetallic layer. This interlayer, composed of active alkaline ions and additional metallic or non-metallic elements, acts as a conductive bridge, facilitating ion transport while preventing detrimental reactions between the electrode and SSE. The intermetallic layer can be tailored in composition and structure to optimize performance.

Benefits

• Enhanced stability: The intermetallic layer effectively prevents parasitic reactions, leading to improved cycle life and safety.
• Improved performance: Demonstrated state-of-the-art electrochemical performance, including long-term cycling stability and high-capacity retention.
• Versatility: Applicable to various electrode and SSE combinations through tailored intermetallic layer design.

Applications

Solid-state batteries: The technology can be integrated into a wide range of SSB applications, including electric vehicles, portable electronics, and grid-scale energy storage.

Opportunity

This innovative approach to interface stabilization represents a significant advancement in SSB technology. By addressing the critical challenge of electrode-SSE compatibility, it opens up new possibilities for high-performance and safe energy storage solutions. Potential commercialization and licensing opportunities exist for this technology.