Al-air flow batteries with replaceable anodes for heavy-duty electric vehicles
Innovative Al-Air flow batteries with replaceable anodes aim to enhance capacity and power density for heavy-duty EVs by optimizing electrolyte and cathode designs, utilizing corrosion inhibitors, and developing high-functioning catalysts.
Overview
The Al-Air flow battery technology offers a promising solution for enhancing the range and efficiency of heavy-duty electric vehicles. By integrating replaceable 3D aluminum anodes with advanced electrolyte and cathode designs, this innovation aims to significantly improve the capacity and power density of flow-cell batteries. Key enhancements include the use of organic and inorganic inhibitors to reduce self-corrosion and the optimization of cathode nanocatalysts to facilitate better oxygen reduction reactions.
Technical specifications
- Replaceable 3D Aluminum Anodes: Designed to mitigate self-corrosion and enhance aluminum utilization up to 90%.
- Advanced Electrolytes: Incorporate organic inhibitors like L-tryptophan and polyvinylpyrrolidone (PVP), alongside inorganic inhibitors such as Na2SnO3, ZnO, and Sn(OH)2 to improve electrochemical stability.
- Optimized Cathodes: Utilize porous structures with transition metals, oxides, graphene, and carbon nanotubes to improve mass and electron transfer, thereby enhancing current densities.
- High Capacity: Achieved a capacity of 2445 mAh/g, reaching 82% of the theoretical value with potential for further improvements.
Technology readiness level
The technology is currently at TRL 3, with successful laboratory demonstrations of key components and ongoing efforts to integrate and test the complete system under real-world conditions.
About University of Tennessee, Knoxville
The University of Tennessee, Knoxville is a comprehensive public land‑grant research university—the flagship of the UT System—classified as R1 and serving more than 40,000 students. Industry engagement is anchored by the UT Research Park at Cherokee Farm, where corporate R&D and joint university–national lab facilities sit just across the river from campus, including assets such as the Volkswagen Innovation Hub and an AT&T 5G testbed. UT’s long‑standing partnership with Oak Ridge National Laboratory—via UT‑Battelle and the UT–Oak Ridge Innovation Institute—gives companies streamlined access to national lab capabilities, talent, and joint programs. A statewide Extension network and established co‑op programs connect companies to faculty expertise and student talent across Tennessee and into federal labs. Research is supported by competitive federal sponsors such as the National Science Foundation and the U.S. Department of Energy. Commercialization is managed by the University of Tennessee Research Foundation, which handles IP, licensing, and startup formation.
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