SMRTR Science & EngineeringApr 7, 2026Interesting Engineering

China’s new sodium battery forms internal firewall to stop fires, survives 572°F test

SMRTR summary

Chinese researchers developed a sodium battery with a revolutionary self-protecting electrolyte that forms an internal firewall when temperatures exceed 302°F, completely preventing dangerous thermal runaway that causes fires and explosions. The breakthrough battery survived extreme testing at 572°F and maintains competitive performance while operating safely from -40°F to 140°F.

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