Story perspectives
Unigrid’s sodium-ion battery gains European safety certification
By Drooid · · How we work
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Story summary
- Unigrid CEO Tan announced the sodium-ion battery earned European safety certification.
- Its cathode contains chromium-3, which could become toxic chromium-6, warned Prof Dame Clare Grey.
- Ivana Hasa said voltage control mitigates chromium-6 risk.
- Tan reported third-party tests found no detectable chromium-6 after extreme over-charging.
- Sodium-ion batteries are larger and heavier than lithium-ion, limiting them to grid storage.