CATL Unveils Sodium‑Ion Battery Claiming 20‑Year Life

At a MIIT-backed industry event in China, CATL presented a sodium-ion battery and a pack architecture called One Shell, Two Cells. The company claimed the sodium cells can endure about 15,000 full charge cycles-roughly 20 years under typical use-and retain usable capacity in extreme cold. CATL said pack configurations could enable vehicle ranges up to 600 kilometers depending on the mix of cells.

The One Shell, Two Cells design lets automakers and storage vendors place sodium-ion and lithium-ion cells in the same enclosure without redesigning the entire pack. CATL outlined a phased commercial rollout beginning later in 2026 and described the architecture as a way to speed integration for vehicle and storage platforms.

CATL presented technical claims that its sodium-ion chemistry can achieve roughly 15,000 full cycles under typical conditions and maintain performance at low temperatures where lithium-ion batteries often lose range. The company identified target applications that include passenger electric vehicles, utility-scale storage and commercial fleets operating in colder climates.

For anodes, CATL is using synthetic hard carbon derived from domestically sourced coal rather than biomass feedstocks. The company named Wanhua Chemical among its suppliers and described the material choice as a way to reduce exposure to volatile organic feedstock markets and ease cost pressure tied to imported anode materials. Sodium-based cells rely on abundant sodium raw materials rather than lithium salts.

CATL noted it will use third-party testing to verify cold-weather capability and lifecycle durability. No U.S. launch date or qualification timeline under local procurement rules was provided. Broader market adoption will depend on cost, certification and integration with automaker platforms.

Event materials listed initial commercial deployments for later in 2026, with wider rollout contingent on external validation and adoption by vehicle makers and storage buyers.