What's Sodium-ion?
A sodium-ion battery is a rechargeable battery that uses sodium ions (Na⁺) as charge carriers. It works in a similar way to lithium-ion batteries, storing and releasing energy through the movement of sodium ions between the cathode and anode. Thanks to the abundant availability of sodium, sodium-ion batteries are seen as a promising alternative for cost-sensitive and safety-focused applications.

Why Sodium-ion?
Sodium-ion batteries offer low cost, high safety, strong low-temperature performance, and enhanced environmental friendliness. Sodium is abundant and easier to source with lower environmental impact, reducing dependence on scarce or high-impact materials such as lithium and cobalt. With high thermal stability and low risk of thermal runaway, sodium-ion batteries maintain stable performance in cold conditions, making them well suited for commercial vehicles, heavy-duty trucks, RVs, marine vessels, motorcycles, as well as energy storage and backup power applications.

The core materials of sodium-ion batteries include cathode materials, anode materials, electrolyte, and separator. Common cathodes are layered oxides and polyanionic compounds, while hard carbon is widely used as the anode. Sodium-based electrolytes are typically applied. This material system avoids reliance on scarce elements like lithium and cobalt, ensuring stable supply and sustainability.

Compared with lithium-ion batteries, sodium-ion batteries have advantages in cost, safety, and low-temperature performance, but their energy density is relatively lower, resulting in slightly larger size and weight. Lithium-ion batteries remain superior in energy density and technological maturity. Overall, sodium-ion batteries serve as a complementary solution, offering unique value in specific applications.