Applications
- Solid-state batteries for electric vehicles
- ASSB developers who require solid electrolytes with improved performance
Advantages/Benefits
- Inexpensive way to stabilize the electrolyte and anode interface
- Prevents degradation of HSEs (halide solid electrolytes) and enables the use of HSEs against the highly reactive metal anode
- Prevents dendrite formation and propagation
- Prevents degradation of HSEs in ambient air
- Excellent room-temperature cycling stability
Background (problem tech solves)
ASSBs (all solid-state batteries) are still in the early stages of development and testing. However, many solid-state electrolytes require energy intense and high-temperature manufacturing processes, resulting in undesirable chemical reactions and material degradation. There is a need for chemically stable and mechanically “soft” halide solid electrolytes that can be processed in ambient air conditions.
Technology Overview
Berkeley Lab scientists developed an approach to prevent HSE degradation by adding an interlayer consisting of a polymer that is Li-compatible, ionic-conducting, and electronically insulating. The approach utilizes a simple one-step and cost-effective process to effectively address the critical issues of anode instability and Li dendrite propagation, enabling the use of HSE against the highly reactive Li-metal anode. The invention also improves air stability of HSEs, reducing the SE manufacturing cost by eliminating their processing and handling in a controlled environment.
Lab demonstrations have resulted in stable plating and stripping for over 1400 hours and excellent room temperature cycling stability on a high-energy ASSB cell.
This invention can be used in a broad class of applications, including high-voltage cathodes and anodes, paving the way for ASSBs with extremely high energy density. It can be adopted into scalable fabrication processes.
Development Stage
TRL 4: Component and/or system validation in laboratory environment
Principal Investigator(s)
- Guoying Chen
- Pravin Didwal
Status
Patent pending
Opportunities
Available for licensing or collaborative research
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