A commercial sodium‑ion battery already in use in China is entering performance territory once reserved for Tesla, adding fresh pressure on the cost edge of lithium‑ion technology. Researchers who evaluated Hina’s cells reported uniform output across a large sample, high power capability, and a design that mirrors key choices found in Tesla batteries. While the low‑cost sodium solution still needs work—particularly with charging in sub‑zero temperatures—it signals a cheaper route for electric vehicles, grid storage, and commercial vehicles that don’t require maximum driving range.
For automakers, the supply‑chain benefit could be as significant as the performance gain. Sodium is abundant and cheaper to source than lithium, which could help battery producers dodge some of the price volatility and supply bottlenecks that have plagued lithium‑ion production.
**How close is it to Tesla performance?**
The Hina cell stood out because the team didn’t stop after testing a single impressive sample. They measured 120 cells with impedance spectroscopy and found strong uniformity throughout the batch. That consistency is the signal that matters for real‑world manufacturing—high peak performance means little if factories cannot reproduce it reliably, especially in vehicles or grid packs that rely on predictable behavior.
The researchers also examined the cells at various currents and temperatures ranging from –20 °C to 45 °C, then used X‑ray imaging and a teardown to inspect the internal structure. The result was a commercial sodium cell that delivers unusually serious power performance for an early‑stage product in this class.
**Why does sodium shift the cost equation?**
The teardown revealed another cost lever inside the cell. Its cathode mix contains sodium, copper, nickel, iron and manganese, with copper employed in a way that could cut reliance on pricier metals such as nickel and cobalt. The cell also features a tabless double‑aluminum architecture. Because sodium does not react with aluminum the way lithium does, manufacturers can use aluminum foil on both sides of the cell instead of depending on copper for the anode current collector. This structural choice could lower more than just material costs by simplifying the current‑collector setup with cheaper aluminum. If sodium‑ion cells keep improving without leaning heavily on expensive metals, they could become a serious cost pressure point for lithium‑ion batteries in price‑sensitive markets.
**What still needs to improve?**
Cold‑weather charging remains the biggest weakness. Researchers found that low‑temperature charging is still problematic, meaning these cells would require careful thermal management before they can handle frequent charging below 0 °C. Energy density is another limitation; today’s sodium‑ion cells generally cannot match the top lithium‑ion batteries for long‑range EVs, so Tesla’s core advantage in maximum driving range stays intact.
Nonetheless, the opening is real. If Hina and other manufacturers enhance cold‑temperature charging, refine hard‑carbon anodes, and advance electrolyte chemistry, sodium‑ion batteries could claim a large role in grid storage, shorter‑range EVs, and commercial vehicles where lithium’s premium may not be justified.