GoKawiilUS start-ups race China in sodium-ion battery push, chromium safety questioned
American start-ups including Unigrid are developing sodium-ion batteries aiming for fully US-sourced supply chains, unlike lithium-ion batteries where China dominates materials and manufacturing. Unigrid's founder Tan says the company currently sources its sodium-ion cells from China but could shift to US suppliers later. Scientists have raised concerns that chromium-3 used in Unigrid's cathode could form toxic chromium-6 under certain conditions, though Tan and one outside researcher say the risk is manageable and the battery has passed safety certification.
GoKawiil's interpretation of the reporting above, not reported fact.
China's current lead in sodium-ion manufacturing means US start-ups face a steep climb to build a domestic alternative to lithium-ion supply chains, which could reduce reliance on Chinese materials if successful. The chromium safety debate highlights that even alternative battery chemistries touted as safer may carry their own risks, suggesting scrutiny will follow any new technology marketed as a safety improvement. Differing expert views point to genuine scientific uncertainty rather than a settled consensus.
- US sodium-ion start-ups aim for fully domestic-sourced batteries, unlike lithium-ion supply chains dominated by China.
- Unigrid currently sources its sodium-ion cells from China but could switch to US suppliers in future.
- Experts disagree on whether chromium-3 in Unigrid's battery poses a meaningful toxicity risk despite passed safety certifications.
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Published there as: “The start-ups hoping to return battery making to the US”
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