Sodium-ion battery technology advances toward 2026 mass production

Sodium-ion battery technology is advancing toward mass commercialization, with significant developments in both material stability and industrial scaling. Researchers at Sun Yat-sen University have identified a critical degradation mechanism in sodium manganese hexacyanoferrate (Mn-HCF) cathodes. They discovered that manganese dissolution triggers a self-propagating chain reaction involving water oxidation and ligand decomposition, which destroys the cathode structure. The team has introduced an in situ surface repair strategy to mitigate this process.

On the industrial front, mass production of sodium-ion batteries is expected by 2026. Companies like CATL in China are scaling the technology as a safer, lower-cost alternative to lithium-ion, targeting grid storage and entry-level electric vehicles. CATL has secured a 60 GWh deal for energy storage, while BYD and HiNa Battery Technology remain key competitors. In the United States, Peak Energy is establishing a 4 GWh annual capacity factory in Sacramento, California, with production and shipments targeted for early 2027.