Sodium-Ion Batteries: The Next-Gen Innovation Still Not Yet Adopted in Electric Scooters

Despite growing attention as a next-generation battery technology, sodium-ion batteries face challenges in becoming widely adopted for electric scooters. While lithium-ion batteries currently dominate the electric scooter battery market, sodium-ion batteries offer advantages in raw material availability and safety, with sodium being abundant and cheaper than lithium. However, their lower energy density—currently ranging from 140 to 180 Wh/kg—limits their application in electric scooters, which require higher energy density to maintain lightweight and compact designs. Even with projected improvements to near 200 Wh/kg, this falls short of high-end lithium-ion cells used in scooters (200-280 Wh/kg). As a result, sodium-ion battery packs would be heavier and bulkier for the same capacity, posing challenges for electric scooters where weight and size are critical. This could lead to a return to larger battery housings or external battery racks, complicating frame designs that are already optimized for lithium-ion systems. Conversely, sodium-ion batteries are seen as more suitable for electric bikes and high-performance scooters, offering potential cost savings and safety improvements, particularly for commercial delivery scooters and fleet vehicles. Sodium-ion technology is actively developing in China, with companies like CATL advancing production capabilities and energy density improvements.