Theion

theion is a deep-tech company redefining energy storage with our crystalline lithium–sulfur battery technology — built to make energy lighter, cleaner, and more powerful. Our mission is to unlock the next generation of high-energy batteries for electric mobility, aviation, space, and portable applications — using sustainable, earth-abundant materials like sulfur and lithium. 🧪 Our breakthrough: By transforming elemental sulfur into a crystalline structure, we are targeting: Up to 3× higher energy density than conventional lithium-ion batteries 1/3 of the CO₂ footprint No nickel, cobalt, or rare metals theion’s patented process dramatically improves cycle life, safety, and manufacturability, creating a new class of energy storage ready for global scale. Our name theion — derived from the ancient Greek word for sulfur — reflects our vision: to power the future with the most abundant crystal on Earth.