Sodium-ion batteries enter U.S. energy storage market

Sodium-ion batteries are transitioning from a promising alternative to a commercial reality within the United States energy storage market. Because these cells can be manufactured using much of the same equipment and processes as lithium-ion cells, production has scaled more rapidly than other alternative chemistries like nickel-hydrogen or flow batteries.

However, developers in the U.S. must navigate evolving regulatory and safety landscapes. Key challenges include meeting domestic content thresholds, complying with foreign-entity-of-concern (FEOC) sourcing rules, and adhering to stringent UL 9540A safety testing. These requirements necessitate complex procurement documentation to trace the origin of cells, cathode and anode materials, and corporate ownership throughout the supply chain.

Sodium-ion technology offers structural advantages in this regulatory environment by sidestepping the concentrated mineral supply chains required for lithium, nickel, cobalt, and manganese. Sodium is plentiful and can be sourced from North American suppliers, making the onshoring of sodium cell production more feasible than other battery chemistries.