All-solid composite cathode architecture for fast-charging solid-state batteries
Introducing an innovative all-solid composite cathode architecture designed to enhance fast-charging capabilities of solid-state batteries. Utilizing dual-solid electrolyte layers and advanced coatings, this solution aims to improve energy density and charge rates for vehicle electrification.
Overview
The proposed all-solid composite cathode (ASCC) architecture is a groundbreaking solution aimed at revolutionizing the fast-charging capabilities of solid-state batteries (SSBs). By employing a dual-solid electrolyte approach, this architecture aims to mitigate interfacial instabilities, thereby enhancing the electrochemical performance and rate capability of SSBs. This technology is particularly significant for applications in vehicle electrification, where high energy density and rapid charging are critical.
Technical specifications
- Active Material: Single crystalline high energy density cathode active material with a uniform particle size of 3-5 μm.
- Protective Coating: A 10 nm uniform layer of protective material such as Nb2O5 or LiNbO3 is applied to the CAM particles.
- Polymer Electrolyte Layer: A subsequent 5 μm polymer electrolyte layer is coated over the protective layer.
- Composite Formation: The doubly-coated CAM is homogeneously mixed with solid electrolyte powder and pelletized.
- Assembly: Integration of ASCC with SE-separator layers and a Li-In alloy anode.
- Fast-Charging: The architecture supports a 15-minute charge capability.
Technology readiness level
Currently, the technology is at TRL 2, indicating that it is in the early stages of concept formulation and experimental proof of concept. Further validation and development are planned, involving electrochemical performance evaluation of the SSBs at various charge rates, supported by partnerships for resources and personnel.
About University of Connecticut
UConn is a comprehensive public research university and the state’s flagship, with its main campus in Storrs and an academic medical center in Farmington. Industry engages through UConn Tech Park—anchored by the Innovation Partnership Building—with shared labs, pilot‑scale testbeds, and advanced prototyping for collaborators. Integration with UConn Health enables clinical collaborations and translation, while Hartford and Stamford campuses connect companies to talent along the New York–Boston corridor; a statewide extension network supports technology adoption. Research is supported by competitive federal funding from agencies such as NIH, NSF, DOE, USDA, and DOD. A dedicated technology commercialization office and the Technology Incubation Program support IP, licensing, and startup incubation across multiple sites.
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