Low-Cost, High Areal Capacity, Anode-Free Sodium-Metal Batteries Enabled by Solid Electrolytes
Project Innovation + Advantages:
24M Technologies will develop low-cost and fast-charging sodium metal EV batteries with good low-temperature performance. 24M’s cell design will incorporate (1) its ultra-thick SemiSolid cathode made up of cobalt-free and nickel-free sodium-based active materials, (2) a wide-temperature, fast-charging electrolyte developed using machine learning and automated high-throughput screening technology, and (3) a solid-state electrolyte-based separator to enable a high-energy density, anode-free configuration. The SemiSolid electrode architecture has been commercially demonstrated with exceptionally high energy density using lithium-ion chemistry. Applying it to sodium-ion chemistry with relatively higher conductivities and high mechanical strength NASICON solid-state film will pave the way for improved low-temperature performance retentions, fast-charging, high-energy density, and reduced cost.