Low temperature sodium battery comprising an electrochemically active molten inorganic catholyte
| DWPI Title: Sodium battery comprises anode current collector, sodium-based liquid metal anode, nonporous sodium ion conducting separator, electrochemically active inorganic molten salt catholyte having sodium iodide, aluminum chloride and gallium chloride |
| Abstract: A high-performance electrochemically active sodium molten salt catholyte enables a dramatic reduction in molten sodium battery operating temperature from near 300° C. to less than 120° C. As an example, stable electrochemical cycling was demonstrated in a high voltage (3.65 V) sodium battery comprising a sodium iodide-gallium chloride (NaI—GaCl3) molten salt catholyte for over 8 months at 110° C. The combination of high voltage, stable cycling behavior, and practical current densities supported by a molten catholyte enables a new generation of transformative high performance, low temperature molten sodium batteries. |
| Use: Sodium battery. |
| Advantage: The sodium battery can operate at greater than 120 °C with a uniformly inorganic, electrochemically active catholyte, enables lower material and processing costs, reduced operation costs, and simplified heat management, and improves lifetime, due to reduced material degradation, decreased reagent volatility, and fewer side reactions. |
| Novelty: Sodium battery comprises an anode current collector, a sodium-based liquid metal anode, a nonporous sodium ion (Na+ )-conducting separator, an electrochemically active inorganic molten salt catholyte comprising at least one sodium halide salt, at least one gallium halide salt, and at least one aluminum halide salt, and an inert cathode current collector, and where the inorganic molten salt catholyte comprises 35-55 mol % sodium iodide (NaI), (65-45)-x mol % aluminum chloride (AlCl3 ), and x mol % gallium chloride (GaCl3 ). |
| Filed: 10/19/2021 |
| Application Number: US17505413A |
| Tech ID: SD 14842.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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