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Natron Energy — sodium-ion (Prussian blue analog) batteries for data center UPS and industrial backup; ceased operations Sept 2025.
About
Natron Energy was a Santa Clara, California sodium-ion battery company spun out of Stanford University in 2012 by Colin Wessells, building cells based on a Prussian blue analog (PBA) chemistry that promised long cycle life, fast charge and discharge, non-flammability, and a domestic supply chain free of lithium, cobalt, and nickel. Natron's…